kdbus: test suite changed to common format

This commit adapts the kdbus test suite to use with
dbus-integration-tests.

Change-Id: Ifee21253f4e3c732b27517a0c566d4b9a569d5af
Signed-off-by: Adrian Szyndela <adrian.s@samsung.com>

31 files changed, 3075 insertions, 3762 deletions

diff --git a/packaging/odroid-linux-kernel.spec b/packaging/odroid-linux-kernel.spec
index 938028befd78..bc5dc74d0021 100644
--- a/packaging/odroid-linux-kernel.spec
+++ b/packaging/odroid-linux-kernel.spec
@@ -56,6 +56,15 @@ Provides: %{variant}-kernel-devel-uname-r = %{fullVersion}
 %description -n %{variant}-linux-kernel-devel
 This package provides kernel map and etc information for odroid kernel.
 
+%package -n kdbus-tests
+License:       Apache-2.0
+Summary:       Kdbus tests
+Group:         Base/IPC
+BuildRequires: libcap-devel rsync
+
+%description -n kdbus-tests
+A single binary that tests kdbus operation.
+
 %prep
 %setup -q -n linux-kernel-%{version}
 
@@ -77,6 +86,9 @@ make dtbs %{?_smp_mflags}
 # 3. Build modules
 make modules %{?_smp_mflags}
 
+# Additionally, build kdbus tests
+make -C tools/testing/selftests/kdbus
+
 %install
 QA_SKIP_BUILD_ROOT="DO_NOT_WANT"; export QA_SKIP_BUILD_ROOT
 
@@ -105,6 +117,12 @@ find %{buildroot}/lib/modules/ -name "*.ko" -type f -print0 | xargs -0 chmod 755
 rm -f %{buildroot}/lib/modules/%{fullVersion}/build
 rm -f %{buildroot}/lib/modules/%{fullVersion}/source
 
+# install kdbus tests
+%define _test_runner_dir /usr/lib/dbus-tests/runner
+mkdir -p %{buildroot}%{_test_runner_dir}
+make -C tools/testing/selftests/kdbus INSTALL_PATH=%{buildroot}%{_test_runner_dir} TEST_PROGS=kdbus-test install
+make -C tools/testing/selftests/kdbus clean
+
 # 9-1. remove unnecessary files to prepare for devel package
 rm -f tools/mkimage*
 find %{_builddir}/linux-kernel-%{version} -name "*\.HEX" -type f -delete
@@ -141,3 +159,7 @@ rm -rf %{buildroot}
 /boot/*.dtb
 /boot/System.map*
 /boot/config*
+
+%files -n kdbus-tests
+%defattr(-,root,root)
+%{_test_runner_dir}/kdbus-test
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index c6e4cb96a2be..244534d2a816 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -13,7 +13,7 @@ TARGETS += gpio
 TARGETS += intel_pstate
 TARGETS += ipc
 TARGETS += kcmp
-#TARGETS += kdbus
+TARGETS += kdbus
 TARGETS += lib
 TARGETS += membarrier
 TARGETS += memfd
diff --git a/tools/testing/selftests/kdbus/Makefile b/tools/testing/selftests/kdbus/Makefile
index 0a5afe3f7b6d..6cad2bae2304 100644
--- a/tools/testing/selftests/kdbus/Makefile
+++ b/tools/testing/selftests/kdbus/Makefile
@@ -1,7 +1,7 @@
-CFLAGS += -I../../../../usr/include/
 CFLAGS += -I../../../../samples/kdbus/
-CFLAGS += -I../../../../include/uapi/
-CFLAGS += -std=gnu99
+#CFLAGS += -I../../../../include/uapi/
+CFLAGS += -I../../../../usr/include/
+CFLAGS += -std=c11 -Wall -Wextra -Wno-maybe-uninitialized -Wno-missing-field-initializers
 CFLAGS += -DKBUILD_MODNAME=\"kdbus\" -D_GNU_SOURCE
 LDLIBS = -pthread -lcap -lm
 
@@ -11,7 +11,6 @@ OBJS= \
 	kdbus-test.o		\
 	kdbus-test.o		\
 	test-activator.o	\
-	test-attach-flags.o	\
 	test-benchmark.o	\
 	test-bus.o		\
 	test-chat.o		\
@@ -28,7 +27,6 @@ OBJS= \
 	test-policy.o		\
 	test-policy-ns.o	\
 	test-policy-priv.o	\
-	test-send.o		\
 	test-sync.o		\
 	test-timeout.o
 
@@ -36,7 +34,7 @@ all: kdbus-test
 
 include ../lib.mk
 
-%.o: %.c
+%.o: %.c $(wildcard *.h)
 	$(CC) $(CFLAGS) -c $< -o $@
 
 kdbus-test: $(OBJS)
diff --git a/tools/testing/selftests/kdbus/kdbus-api.h b/tools/testing/selftests/kdbus/kdbus-api.h
new file mode 100644
index 000000000000..4189a6a1b1db
--- /dev/null
+++ b/tools/testing/selftests/kdbus/kdbus-api.h
@@ -0,0 +1,114 @@
+#ifndef KDBUS_API_H
+#define KDBUS_API_H
+
+#include <sys/ioctl.h>
+#include "kdbus-util.h"
+
+#define KDBUS_ALIGN8(l) (((l) + 7) & ~7)
+#define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data)
+#define KDBUS_ITEM_SIZE(s) KDBUS_ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
+#define KDBUS_ITEM_NEXT(item) \
+	(typeof(item))((uint8_t *)(item) + KDBUS_ALIGN8((item)->size))
+#define KDBUS_FOREACH(iter, first, _size)				\
+	for ((iter) = (first);						\
+	     ((uint8_t *)(iter) < (uint8_t *)(first) + (_size)) &&	\
+	       ((uint8_t *)(iter) >= (uint8_t *)(first));		\
+	     (iter) = (void *)((uint8_t *)(iter) + KDBUS_ALIGN8((iter)->size)))
+
+static inline wur int kdbus_cmd_bus_make(int control_fd, struct kdbus_cmd *cmd)
+{
+	int ret = ioctl(control_fd, KDBUS_CMD_BUS_MAKE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_endpoint_make(int bus_fd, struct kdbus_cmd *cmd)
+{
+	int ret = ioctl(bus_fd, KDBUS_CMD_ENDPOINT_MAKE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_endpoint_update(int ep_fd, struct kdbus_cmd *cmd)
+{
+	int ret = ioctl(ep_fd, KDBUS_CMD_ENDPOINT_UPDATE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_hello(int bus_fd, struct kdbus_cmd_hello *cmd)
+{
+	int ret = ioctl(bus_fd, KDBUS_CMD_HELLO, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_update(int fd, struct kdbus_cmd *cmd)
+{
+	int ret = ioctl(fd, KDBUS_CMD_UPDATE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_byebye(int conn_fd, struct kdbus_cmd *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_BYEBYE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_free(int conn_fd, struct kdbus_cmd_free *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_FREE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_conn_info(int conn_fd, struct kdbus_cmd_info *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_CONN_INFO, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_bus_creator_info(int conn_fd, struct kdbus_cmd_info *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_BUS_CREATOR_INFO, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_list(int fd, struct kdbus_cmd_list *cmd)
+{
+	int ret = ioctl(fd, KDBUS_CMD_LIST, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_send(int conn_fd, struct kdbus_cmd_send *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_SEND, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_recv(int conn_fd, struct kdbus_cmd_recv *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_RECV, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_name_acquire(int conn_fd, struct kdbus_cmd *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_NAME_ACQUIRE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_name_release(int conn_fd, struct kdbus_cmd *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_NAME_RELEASE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_match_add(int conn_fd, struct kdbus_cmd_match *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_MATCH_ADD, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+static inline wur int kdbus_cmd_match_remove(int conn_fd, struct kdbus_cmd_match *cmd)
+{
+	int ret = ioctl(conn_fd, KDBUS_CMD_MATCH_REMOVE, cmd);
+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
+}
+
+#endif /* KDBUS_API_H */
diff --git a/tools/testing/selftests/kdbus/kdbus-enum.c b/tools/testing/selftests/kdbus/kdbus-enum.c
index 4f1e5797895f..4b642c64c0b0 100644
--- a/tools/testing/selftests/kdbus/kdbus-enum.c
+++ b/tools/testing/selftests/kdbus/kdbus-enum.c
@@ -11,7 +11,6 @@
 #include <string.h>
 #include <fcntl.h>
 #include <stdlib.h>
-#include <stddef.h>
 #include <unistd.h>
 #include <stdint.h>
 #include <errno.h>
diff --git a/tools/testing/selftests/kdbus/kdbus-enum.h b/tools/testing/selftests/kdbus/kdbus-enum.h
index a67cec3512a7..ed28cca26906 100644
--- a/tools/testing/selftests/kdbus/kdbus-enum.h
+++ b/tools/testing/selftests/kdbus/kdbus-enum.h
@@ -6,6 +6,7 @@
  * Free Software Foundation; either version 2.1 of the License, or (at
  * your option) any later version.
  */
+
 #pragma once
 
 const char *enum_CMD(long long id);
diff --git a/tools/testing/selftests/kdbus/kdbus-test.c b/tools/testing/selftests/kdbus/kdbus-test.c
index 356a1c7fdf72..cf2a6b1a8826 100644
--- a/tools/testing/selftests/kdbus/kdbus-test.c
+++ b/tools/testing/selftests/kdbus/kdbus-test.c
@@ -25,7 +25,6 @@
 enum {
 	TEST_CREATE_BUS		= 1 << 0,
 	TEST_CREATE_CONN	= 1 << 1,
-	TEST_CREATE_CAN_FAIL	= 1 << 2,
 };
 
 struct kdbus_test {
@@ -33,266 +32,336 @@ struct kdbus_test {
 	const char *desc;
 	int (*func)(struct kdbus_test_env *env);
 	unsigned int flags;
+	unsigned timeout;
 };
 
 struct kdbus_test_args {
 	bool mntns;
 	bool pidns;
 	bool userns;
+	bool no_timeout;
 	char *uid_map;
 	char *gid_map;
 	int loop;
 	int wait;
 	int fork;
 	int tap_output;
+	unsigned nTests;
+	char const * const *tests;
 	char *module;
 	char *root;
-	char *test;
 	char *busname;
-	char *mask_param_path;
 };
 
+pthread_mutex_t global_print_lock = PTHREAD_MUTEX_INITIALIZER;
+
 static const struct kdbus_test tests[] = {
 	{
 		.name	= "bus-make",
 		.desc	= "bus make functions",
 		.func	= kdbus_test_bus_make,
 		.flags	= 0,
+		.timeout = 10,
 	},
 	{
 		.name	= "hello",
 		.desc	= "the HELLO command",
 		.func	= kdbus_test_hello,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "byebye",
 		.desc	= "the BYEBYE command",
 		.func	= kdbus_test_byebye,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "chat",
 		.desc	= "a chat pattern",
 		.func	= kdbus_test_chat,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "daemon",
 		.desc	= "a simple daemon",
 		.func	= kdbus_test_daemon,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "fd-passing",
 		.desc	= "file descriptor passing",
 		.func	= kdbus_test_fd_passing,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "endpoint",
 		.desc	= "custom endpoint",
 		.func	= kdbus_test_custom_endpoint,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "monitor",
 		.desc	= "monitor functionality",
 		.func	= kdbus_test_monitor,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "name-basics",
 		.desc	= "basic name registry functions",
 		.func	= kdbus_test_name_basic,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "name-conflict",
 		.desc	= "name registry conflict details",
 		.func	= kdbus_test_name_conflict,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "name-queue",
 		.desc	= "queuing of names",
 		.func	= kdbus_test_name_queue,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
+	},
+	{
+		.name	= "name-takeover",
+		.desc	= "takeover of names",
+		.func	= kdbus_test_name_takeover,
+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "message-basic",
 		.desc	= "basic message handling",
 		.func	= kdbus_test_message_basic,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "message-prio",
 		.desc	= "handling of messages with priority",
 		.func	= kdbus_test_message_prio,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
+	},
+	{
+		.name	= "activator-quota",
+		.desc	= "activator message quotas are enforced",
+		.func	= kdbus_test_activator_quota,
+		.flags	= TEST_CREATE_BUS,
+		.timeout = 20,
 	},
 	{
 		.name	= "message-quota",
 		.desc	= "message quotas are enforced",
 		.func	= kdbus_test_message_quota,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 20,
 	},
 	{
 		.name	= "memory-access",
 		.desc	= "memory access",
 		.func	= kdbus_test_memory_access,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "timeout",
 		.desc	= "timeout",
 		.func	= kdbus_test_timeout,
 		.flags	= TEST_CREATE_BUS,
-	},
-	{
-		.name	= "send",
-		.desc	= "send",
-		.func	= kdbus_test_send,
-		.flags	= TEST_CREATE_CONN | TEST_CREATE_CAN_FAIL,
+		.timeout = 10,
 	},
 	{
 		.name	= "sync-byebye",
 		.desc	= "synchronous replies vs. BYEBYE",
 		.func	= kdbus_test_sync_byebye,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "sync-reply",
 		.desc	= "synchronous replies",
 		.func	= kdbus_test_sync_reply,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
+	},
+	{
+		.name	= "big-meta",
+		.desc	= "big metadata",
+		.func	= kdbus_test_big_metadata,
+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "message-free",
 		.desc	= "freeing of memory",
 		.func	= kdbus_test_free,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "connection-info",
 		.desc	= "retrieving connection information",
 		.func	= kdbus_test_conn_info,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "connection-update",
 		.desc	= "updating connection information",
 		.func	= kdbus_test_conn_update,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "writable-pool",
 		.desc	= "verifying pools are never writable",
 		.func	= kdbus_test_writable_pool,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "policy",
 		.desc	= "policy",
 		.func	= kdbus_test_policy,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "policy-priv",
 		.desc	= "unprivileged bus access",
 		.func	= kdbus_test_policy_priv,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "policy-ns",
 		.desc	= "policy in user namespaces",
 		.func	= kdbus_test_policy_ns,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
+	},
+	{
+		.name	= "metadata",
+		.desc	= "metadata",
+		.func	= kdbus_test_metadata,
+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
+	},
+	{
+		.name	= "metadata-conn-info",
+		.desc	= "metadata in connection-info",
+		.func	= kdbus_test_metadata_conn_info,
+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "metadata-ns",
 		.desc	= "metadata in different namespaces",
 		.func	= kdbus_test_metadata_ns,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "match-id-add",
 		.desc	= "adding of matches by id",
 		.func	= kdbus_test_match_id_add,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "match-id-remove",
 		.desc	= "removing of matches by id",
 		.func	= kdbus_test_match_id_remove,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "match-replace",
 		.desc	= "replace of matches with the same cookie",
 		.func	= kdbus_test_match_replace,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "match-name-add",
 		.desc	= "adding of matches by name",
 		.func	= kdbus_test_match_name_add,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "match-name-remove",
 		.desc	= "removing of matches by name",
 		.func	= kdbus_test_match_name_remove,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "match-name-change",
 		.desc	= "matching for name changes",
 		.func	= kdbus_test_match_name_change,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "match-bloom",
 		.desc	= "matching with bloom filters",
 		.func	= kdbus_test_match_bloom,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
+	},
+	{
+		.name	= "match-all",
+		.desc	= "itemless catch-all matching",
+		.func	= kdbus_test_match_itemless,
+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "activator",
 		.desc	= "activator connections",
 		.func	= kdbus_test_activator,
 		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
+		.timeout = 10,
 	},
 	{
 		.name	= "benchmark",
 		.desc	= "benchmark",
 		.func	= kdbus_test_benchmark,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "benchmark-nomemfds",
 		.desc	= "benchmark without using memfds",
 		.func	= kdbus_test_benchmark_nomemfds,
 		.flags	= TEST_CREATE_BUS,
+		.timeout = 10,
 	},
 	{
 		.name	= "benchmark-uds",
 		.desc	= "benchmark comparison to UDS",
 		.func	= kdbus_test_benchmark_uds,
 		.flags	= TEST_CREATE_BUS,
-	},
-	{
-		/* Last test */
-		.name	= "attach-flags",
-		.desc	= "attach flags mask",
-		.func	= kdbus_test_attach_flags,
-		.flags	= 0,
+		.timeout = 10,
 	},
 };
 
 #define N_TESTS ((int) (sizeof(tests) / sizeof(tests[0])))
 
-static int test_prepare_env(const struct kdbus_test *t,
+static wur int test_prepare_env(const struct kdbus_test *t,
 			    const struct kdbus_test_args *args,
 			    struct kdbus_test_env *env)
 {
@@ -301,62 +370,37 @@ static int test_prepare_env(const struct kdbus_test *t,
 		char *n = NULL;
 		int ret;
 
-		asprintf(&s, "%s/control", args->root);
+		if (0 >= asprintf(&s, "%s/control", args->root))
+			fail("asprintf");
 
 		env->control_fd = open(s, O_RDWR);
 		free(s);
-		ASSERT_RETURN(env->control_fd >= 0);
+		ASSERT_RETURN(env->control_fd,>=,0);
 
-		if (!args->busname) {
-			n = unique_name("test-bus");
-			ASSERT_RETURN(n);
-		}
+		if (!args->busname)
+			ASSERT_NONZERO(n = unique_name("test-bus"));
 
 		ret = kdbus_create_bus(env->control_fd,
 				       args->busname ?: n,
-				       _KDBUS_ATTACH_ALL,
 				       _KDBUS_ATTACH_ALL, &s);
 		free(n);
-		ASSERT_RETURN((ret == 0) || (t->flags & TEST_CREATE_CAN_FAIL));
+		ASSERT_ZERO(ret);
 
-		asprintf(&env->buspath, "%s/%s/bus", args->root, s);
+		if (0 >= asprintf(&env->buspath, "%s/%s/bus", args->root, s))
+			fail("asprintf");
 		free(s);
 	}
 
-	if (t->flags & TEST_CREATE_CONN) {
-		if (!env->buspath) {
-			char *s = NULL;
-			char *n = NULL;
-			int ret;
-
-			if (!args->busname) {
-				n = unique_name("test-bus");
-				ASSERT_RETURN(n);
-			}
-
-			ret = kdbus_create_bus(-1,
-					       args->busname ?: n,
-					       0,
-					       0, &s);
-			free(n);
-			ASSERT_RETURN(ret == 0);
-
-			asprintf(&env->buspath, "%s/%s/bus", args->root, s);
-			free(s);
-		}
-		ASSERT_RETURN(env->buspath);
-		env->conn = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_RETURN(env->conn || (t->flags & TEST_CREATE_CAN_FAIL));
-	}
+	if (t->flags & TEST_CREATE_CONN)
+		ASSERT_NONZERO(env->conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	env->root = args->root;
 	env->module = args->module;
-	env->mask_param_path = args->mask_param_path;
 
 	return 0;
 }
 
-void test_unprepare_env(const struct kdbus_test *t, struct kdbus_test_env *env)
+static void test_unprepare_env(struct kdbus_test_env *env)
 {
 	if (env->conn) {
 		kdbus_conn_free(env->conn);
@@ -364,7 +408,7 @@ void test_unprepare_env(const struct kdbus_test *t, struct kdbus_test_env *env)
 	}
 
 	if (env->control_fd >= 0) {
-		close(env->control_fd);
+		CLOSE(env->control_fd);
 		env->control_fd = -1;
 	}
 
@@ -374,7 +418,7 @@ void test_unprepare_env(const struct kdbus_test *t, struct kdbus_test_env *env)
 	}
 }
 
-static int test_run(const struct kdbus_test *t,
+static wur int test_run(const struct kdbus_test *t,
 		    const struct kdbus_test_args *kdbus_args,
 		    int wait)
 {
@@ -386,55 +430,76 @@ static int test_run(const struct kdbus_test *t,
 		return ret;
 
 	if (wait > 0) {
-		printf("Sleeping %d seconds before running test ...\n", wait);
+		print("Sleeping %d seconds before running test ...\n", wait);
 		sleep(wait);
 	}
 
 	ret = t->func(&env);
-	test_unprepare_env(t, &env);
+	test_unprepare_env(&env);
 	return ret;
 }
 
-static int test_run_forked(const struct kdbus_test *t,
+static wur int test_run_forked(const struct kdbus_test *t,
 			   const struct kdbus_test_args *kdbus_args,
-			   int wait)
+			   int _wait)
 {
-	int ret;
-	pid_t pid;
+	int ret, result;
+	pid_t pid, timer_pid;
 
 	pid = fork();
 	if (pid < 0) {
 		return TEST_ERR;
 	} else if (pid == 0) {
-		ret = test_run(t, kdbus_args, wait);
-		_exit(ret);
+		ret = test_run(t, kdbus_args, _wait);
+		exit(ret);
 	}
 
-	pid = waitpid(pid, &ret, 0);
-	if (pid <= 0)
-		return TEST_ERR;
-	else if (!WIFEXITED(ret))
-		return TEST_ERR;
-	else
-		return WEXITSTATUS(ret);
+	if (!kdbus_args->no_timeout) {
+		timer_pid = fork();
+		if (timer_pid < 0) {
+			return TEST_ERR;
+		} else if (timer_pid == 0) {
+			sleep(t->timeout);
+			exit(1);
+		}
+	}
+
+	result = -1;
+	for (;;) {
+		pid_t wpid = wait(&ret);
+		if (wpid <= 0)
+			return TEST_ERR;
+		if (result >= 0)
+			break;
+		result = !WIFEXITED(ret) || WEXITSTATUS(ret) ? TEST_ERR + (timer_pid==wpid) : TEST_OK;
+		if (kdbus_args->no_timeout)
+			break;
+		kill(wpid ^ pid ^ timer_pid, SIGKILL);
+	}
+
+	return result;
 }
 
 static void print_test_result(int ret)
 {
 	switch (ret) {
 	case TEST_OK:
-		printf("OK");
+		print("OK");
 		break;
 	case TEST_SKIP:
-		printf("SKIPPED");
+		print("SKIPPED");
 		break;
 	case TEST_ERR:
-		printf("ERROR");
+		print("ERROR");
 		break;
 	}
 }
 
-static int start_all_tests(struct kdbus_test_args *kdbus_args)
+static void print_res(struct kdbus_test const *t, int ret) {
+	printf("%s;%s\n", t->name, !ret ? "PASS" : TEST_TIME==ret ? "FAIL;TIMEOUT" : "FAIL");
+}
+
+static wur int start_all_tests(struct kdbus_test_args const *kdbus_args)
 {
 	int ret;
 	unsigned int fail_cnt = 0;
@@ -443,7 +508,7 @@ static int start_all_tests(struct kdbus_test_args *kdbus_args)
 	unsigned int i;
 
 	if (kdbus_args->tap_output) {
-		printf("1..%d\n", N_TESTS);
+		print("1..%d\n", N_TESTS);
 		fflush(stdout);
 	}
 
@@ -455,10 +520,10 @@ static int start_all_tests(struct kdbus_test_args *kdbus_args)
 		if (!kdbus_args->tap_output) {
 			unsigned int n;
 
-			printf("Testing %s (%s) ", t->desc, t->name);
+			print("Testing %s (%s) ", t->desc, t->name);
 			for (n = 0; n < 60 - strlen(t->desc) - strlen(t->name); n++)
-				printf(".");
-			printf(" ");
+				print(".");
+			print(" ");
 		}
 
 		ret = test_run_forked(t, kdbus_args, 0);
@@ -470,83 +535,87 @@ static int start_all_tests(struct kdbus_test_args *kdbus_args)
 			skip_cnt++;
 			break;
 		case TEST_ERR:
+		case TEST_TIME:
 			fail_cnt++;
 			break;
 		}
 
 		if (kdbus_args->tap_output) {
-			printf("%sok %d - %s%s (%s)\n",
-			       (ret == TEST_ERR) ? "not " : "", i + 1,
+			print("%sok %d - %s%s (%s)\n",
+			       (ret >= TEST_ERR) ? "not " : "", i + 1,
 			       (ret == TEST_SKIP) ? "# SKIP " : "",
 			       t->desc, t->name);
 			fflush(stdout);
 		} else {
 			print_test_result(ret);
-			printf("\n");
+			print_res(t, ret);
+			print("\n");
 		}
 	}
 
 	if (kdbus_args->tap_output)
-		printf("Failed %d/%d tests, %.2f%% okay\n", fail_cnt, N_TESTS,
+		print("Failed %d/%d tests, %.2f%% okay\n", fail_cnt, N_TESTS,
 		       100.0 - (fail_cnt * 100.0) / ((float) N_TESTS));
 	else
-		printf("\nSUMMARY: %u tests passed, %u skipped, %u failed\n",
+		print("\nSUMMARY: %u tests passed, %u skipped, %u failed\n",
 		       ok_cnt, skip_cnt, fail_cnt);
 
 	return fail_cnt > 0 ? TEST_ERR : TEST_OK;
 }
 
-static int start_one_test(struct kdbus_test_args *kdbus_args)
+static wur int start_some_tests(struct kdbus_test_args const *kdbus_args)
 {
 	int i, ret;
 	bool test_found = false;
+	unsigned j=0, nTests = kdbus_args->nTests;
+
+	do {
+		char const *tName = kdbus_args->tests[j];
+		for (i = 0; i < N_TESTS; i++) {
+			const struct kdbus_test *t = tests + i;
+
+			if (strcmp(t->name, tName))
+				continue;
+
+			do {
+				test_found = true;
+				if (kdbus_args->fork)
+					ret = test_run_forked(t, kdbus_args,
+								  kdbus_args->wait);
+				else
+					ret = test_run(t, kdbus_args,
+							   kdbus_args->wait);
+
+				print("Testing %s: ", t->desc);
+				print_test_result(ret);
+				print_res(t, ret);
+				print("\n");
+
+				if (ret != TEST_OK)
+					break;
+			} while (kdbus_args->loop);
+		}
 
-	for (i = 0; i < N_TESTS; i++) {
-		const struct kdbus_test *t = tests + i;
-
-		if (strcmp(t->name, kdbus_args->test))
-			continue;
-
-		do {
-			test_found = true;
-			if (kdbus_args->fork)
-				ret = test_run_forked(t, kdbus_args,
-						      kdbus_args->wait);
-			else
-				ret = test_run(t, kdbus_args,
-					       kdbus_args->wait);
-
-			printf("Testing %s: ", t->desc);
-			print_test_result(ret);
-			printf("\n");
-
-			if (ret != TEST_OK)
-				break;
-		} while (kdbus_args->loop);
-
-		return ret;
-	}
-
-	if (!test_found) {
-		printf("Unknown test-id '%s'\n", kdbus_args->test);
-		return TEST_ERR;
-	}
+		if (!test_found) {
+			print("%s;UNKNOWN\n", tName);
+		}
+	} while (++j < nTests);
 
-	return TEST_OK;
+	return ret;
 }
 
 static void usage(const char *argv0)
 {
 	unsigned int i, j;
 
-	printf("Usage: %s [options]\n"
+	print("Usage: %s [options]\n"
 	       "Options:\n"
 	       "\t-a, --tap		Output test results in TAP format\n"
 	       "\t-m, --module <module>	Kdbus module name\n"
 	       "\t-x, --loop		Run in a loop\n"
 	       "\t-f, --fork		Fork before running a test\n"
 	       "\t-h, --help		Print this help\n"
-	       "\t-r, --root <root>	Toplevel of the kdbus hierarchy\n"
+	       "\t-R, --root <root>	Toplevel of the kdbus hierarchy\n"
 	       "\t-t, --test <test-id>	Run one specific test only, in verbose mode\n"
 	       "\t-b, --bus <busname>	Instead of generating a random bus name, take <busname>.\n"
 	       "\t-w, --wait <secs>	Wait <secs> before actually starting test\n"
@@ -557,37 +626,37 @@ static void usage(const char *argv0)
 	       "\t    --gidmap gid_map	GID map for user namespace\n"
 	       "\n", argv0);
 
-	printf("By default, all test are run once, and a summary is printed.\n"
+	print("By default, all test are run once, and a summary is printed.\n"
 	       "Available tests for --test:\n\n");
 
 	for (i = 0; i < N_TESTS; i++) {
 		const struct kdbus_test *t = tests + i;
 
-		printf("\t%s", t->name);
+		print("\t%s", t->name);
 
 		for (j = 0; j < 24 - strlen(t->name); j++)
-			printf(" ");
+			print(" ");
 
-		printf("Test %s\n", t->desc);
+		print("Test %s\n", t->desc);
 	}
 
-	printf("\n");
-	printf("Note that some tests may, if run specifically by --test, "
+	print("\n");
+	print("Note that some tests may, if run specifically by --test, "
 	       "behave differently, and not terminate by themselves.\n");
 
 	exit(EXIT_FAILURE);
 }
 
-void print_kdbus_test_args(struct kdbus_test_args *args)
+void print_kdbus_test_args(struct kdbus_test_args const *args)
 {
 	if (args->userns || args->pidns || args->mntns)
-		printf("# Starting tests in new %s%s%s namespaces%s\n",
+		print("# Starting tests in new %s%s%s namespaces%s\n",
 			args->mntns ? "MOUNT " : "",
 			args->pidns ? "PID " : "",
 			args->userns ? "USER " : "",
 			args->mntns ? ", kdbusfs will be remounted" : "");
 	else
-		printf("# Starting tests in the same namespaces\n");
+		print("# Starting tests in the same namespaces\n");
 }
 
 void print_metadata_support(void)
@@ -603,15 +672,15 @@ void print_metadata_support(void)
 	no_meta_seclabel = !config_security_is_enabled();
 
 	if (no_meta_audit | no_meta_cgroups | no_meta_seclabel)
-		printf("# Starting tests without %s%s%s metadata support\n",
+		print("# Starting tests without %s%s%s metadata support\n",
 		       no_meta_audit ? "AUDIT " : "",
 		       no_meta_cgroups ? "CGROUP " : "",
 		       no_meta_seclabel ? "SECLABEL " : "");
 	else
-		printf("# Starting tests with full metadata support\n");
+		print("# Starting tests with full metadata support\n");
 }
 
-int run_tests(struct kdbus_test_args *kdbus_args)
+wur int run_tests(struct kdbus_test_args const *kdbus_args)
 {
 	int ret;
 	static char control[4096];
@@ -619,13 +688,13 @@ int run_tests(struct kdbus_test_args *kdbus_args)
 	snprintf(control, sizeof(control), "%s/control", kdbus_args->root);
 
 	if (access(control, W_OK) < 0) {
-		printf("Unable to locate control node at '%s'.\n",
+		print("Unable to locate control node at '%s'.\n",
 			control);
 		return TEST_ERR;
 	}
 
-	if (kdbus_args->test) {
-		ret = start_one_test(kdbus_args);
+	if (kdbus_args->nTests) {
+		ret = start_some_tests(kdbus_args);
 	} else {
 		do {
 			ret = start_all_tests(kdbus_args);
@@ -637,9 +706,9 @@ int run_tests(struct kdbus_test_args *kdbus_args)
 	return ret;
 }
 
-static void nop_handler(int sig) {}
+static void nop_handler(int sig) { UNUSED(sig); }
 
-static int test_prepare_mounts(struct kdbus_test_args *kdbus_args)
+static wur int test_prepare_mounts(struct kdbus_test_args const *kdbus_args)
 {
 	int ret;
 	char kdbusfs[64] = {'\0'};
@@ -650,7 +719,7 @@ static int test_prepare_mounts(struct kdbus_test_args *kdbus_args)
 	ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL);
 	if (ret < 0) {
 		ret = -errno;
-		printf("error mount() root: %d (%m)\n", ret);
+		print("error mount() root: %d (%m)\n", ret);
 		return ret;
 	}
 
@@ -660,7 +729,7 @@ static int test_prepare_mounts(struct kdbus_test_args *kdbus_args)
 			    MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
 		if (ret < 0) {
 			ret = -errno;
-			printf("error mount() /proc : %d (%m)\n", ret);
+			print("error mount() /proc : %d (%m)\n", ret);
 			return ret;
 		}
 	}
@@ -670,14 +739,14 @@ static int test_prepare_mounts(struct kdbus_test_args *kdbus_args)
 		    MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
 	if (ret < 0) {
 		ret = -errno;
-		printf("error mount() %s :%d (%m)\n", kdbusfs, ret);
+		print("error mount() %s :%d (%m)\n", kdbusfs, ret);
 		return ret;
 	}
 
 	return 0;
 }
 
-int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
+wur int run_tests_in_namespaces(struct kdbus_test_args const *kdbus_args)
 {
 	int ret;
 	int efd = -1;
@@ -692,14 +761,14 @@ int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
 	efd = eventfd(0, EFD_CLOEXEC);
 	if (efd < 0) {
 		ret = -errno;
-		printf("eventfd() failed: %d (%m)\n", ret);
+		print("eventfd() failed: %d (%m)\n", ret);
 		return TEST_ERR;
 	}
 
 	ret = sigaction(SIGCHLD, &sa, &oldsa);
 	if (ret < 0) {
 		ret = -errno;
-		printf("sigaction() failed: %d (%m)\n", ret);
+		print("sigaction() failed: %d (%m)\n", ret);
 		return TEST_ERR;
 	}
 
@@ -709,7 +778,7 @@ int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
 		      (kdbus_args->mntns ? CLONE_NEWNS : 0) |
 		      (kdbus_args->pidns ? CLONE_NEWPID : 0), NULL);
 	if (pid < 0) {
-		printf("clone() failed: %d (%m)\n", -errno);
+		print("clone() failed: %d (%m)\n", -errno);
 		return TEST_ERR;
 	}
 
@@ -719,34 +788,34 @@ int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
 		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
 		if (ret < 0) {
 			ret = -errno;
-			printf("error prctl(): %d (%m)\n", ret);
-			_exit(TEST_ERR);
+			print("error prctl(): %d (%m)\n", ret);
+			exit(TEST_ERR);
 		}
 
 		/* reset sighandlers of childs */
 		ret = sigaction(SIGCHLD, &oldsa, NULL);
 		if (ret < 0) {
 			ret = -errno;
-			printf("sigaction() failed: %d (%m)\n", ret);
-			_exit(TEST_ERR);
+			print("sigaction() failed: %d (%m)\n", ret);
+			exit(TEST_ERR);
 		}
 
 		ret = eventfd_read(efd, &event_status);
 		if (ret < 0 || event_status != 1) {
-			printf("error eventfd_read()\n");
-			_exit(TEST_ERR);
+			print("error eventfd_read()\n");
+			exit(TEST_ERR);
 		}
 
 		if (kdbus_args->mntns) {
 			ret = test_prepare_mounts(kdbus_args);
 			if (ret < 0) {
-				printf("error preparing mounts\n");
-				_exit(TEST_ERR);
+				print("error preparing mounts\n");
+				exit(TEST_ERR);
 			}
 		}
 
 		ret = run_tests(kdbus_args);
-		_exit(ret);
+		exit(ret);
 	}
 
 	/* Setup userns mapping */
@@ -754,7 +823,7 @@ int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
 		ret = userns_map_uid_gid(pid, kdbus_args->uid_map,
 					 kdbus_args->gid_map);
 		if (ret < 0) {
-			printf("error mapping uid and gid in userns\n");
+			print("error mapping uid and gid in userns\n");
 			eventfd_write(efd, 2);
 			return TEST_ERR;
 		}
@@ -763,14 +832,14 @@ int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
 	ret = eventfd_write(efd, 1);
 	if (ret < 0) {
 		ret = -errno;
-		printf("error eventfd_write(): %d (%m)\n", ret);
+		print("error eventfd_write(): %d (%m)\n", ret);
 		return TEST_ERR;
 	}
 
 	rpid = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(rpid == pid, TEST_ERR);
+	ASSERT_RETURN_VAL(rpid,==,pid, TEST_ERR);
 
-	close(efd);
+	CLOSE(efd);
 
 	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
 		return TEST_ERR;
@@ -778,30 +847,28 @@ int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
 	return TEST_OK;
 }
 
-int start_tests(struct kdbus_test_args *kdbus_args)
+wur int start_tests(struct kdbus_test_args const *kdbus_args)
 {
 	int ret;
 	bool namespaces;
-	uint64_t kdbus_param_mask;
-	static char fspath[4096], parampath[4096];
 
 	namespaces = (kdbus_args->mntns || kdbus_args->pidns ||
 		      kdbus_args->userns);
 
 	/* for pidns we need mntns set */
 	if (kdbus_args->pidns && !kdbus_args->mntns) {
-		printf("Failed: please set both pid and mnt namesapces\n");
+		print("Failed: please set both pid and mnt namesapces\n");
 		return TEST_ERR;
 	}
 
 	if (kdbus_args->userns) {
 		if (!config_user_ns_is_enabled()) {
-			printf("User namespace not supported\n");
+			print("User namespace not supported\n");
 			return TEST_ERR;
 		}
 
 		if (!kdbus_args->uid_map || !kdbus_args->gid_map) {
-			printf("Failed: please specify uid or gid mapping\n");
+			print("Failed: please specify uid or gid mapping\n");
 			return TEST_ERR;
 		}
 	}
@@ -809,29 +876,6 @@ int start_tests(struct kdbus_test_args *kdbus_args)
 	print_kdbus_test_args(kdbus_args);
 	print_metadata_support();
 
-	/* setup kdbus paths */
-	if (!kdbus_args->module)
-		kdbus_args->module = "kdbus";
-
-	if (!kdbus_args->root) {
-		snprintf(fspath, sizeof(fspath), "/sys/fs/%s",
-			 kdbus_args->module);
-		kdbus_args->root = fspath;
-	}
-
-	snprintf(parampath, sizeof(parampath),
-		 "/sys/module/%s/parameters/attach_flags_mask",
-		 kdbus_args->module);
-	kdbus_args->mask_param_path = parampath;
-
-	ret = kdbus_sysfs_get_parameter_mask(kdbus_args->mask_param_path,
-					     &kdbus_param_mask);
-	if (ret < 0)
-		return TEST_ERR;
-
-	printf("# Starting tests with an attach_flags_mask=0x%llx\n",
-		(unsigned long long)kdbus_param_mask);
-
 	/* Start tests */
 	if (namespaces)
 		ret = run_tests_in_namespaces(kdbus_args);
@@ -841,10 +885,11 @@ int start_tests(struct kdbus_test_args *kdbus_args)
 	return ret;
 }
 
-int main(int argc, char *argv[])
+wur int main(int argc, char *argv[])
 {
 	int t, ret = 0;
-	struct kdbus_test_args *kdbus_args;
+	struct kdbus_test_args kdbus_args;
+	static char fspath[4096];
 	enum {
 		ARG_MNTNS = 0x100,
 		ARG_PIDNS,
@@ -852,26 +897,22 @@ int main(int argc, char *argv[])
 		ARG_UIDMAP,
 		ARG_GIDMAP,
 	};
-	char *exec = basename(argv[0]);
 
-	kdbus_args = malloc(sizeof(*kdbus_args));
-	if (!kdbus_args) {
-		printf("unable to malloc() kdbus_args\n");
-		return EXIT_FAILURE;
-	}
-
-	memset(kdbus_args, 0, sizeof(*kdbus_args));
+	memset(&kdbus_args, 0, sizeof(kdbus_args));
+	kdbus_args.module = "kdbus";
 
 	static const struct option options[] = {
 		{ "loop",	no_argument,		NULL, 'x' },
 		{ "help",	no_argument,		NULL, 'h' },
-		{ "root",	required_argument,	NULL, 'r' },
-		{ "test",	required_argument,	NULL, 't' },
+		{ "root",	required_argument,	NULL, 'R' },
+		{ "test",	no_argument,		NULL, 't' },
 		{ "bus",	required_argument,	NULL, 'b' },
 		{ "wait",	required_argument,	NULL, 'w' },
 		{ "fork",	no_argument,		NULL, 'f' },
+		{ "list",	no_argument,		NULL, 'l' },
 		{ "module",	required_argument,	NULL, 'm' },
 		{ "tap",	no_argument,		NULL, 'a' },
+		{ "notimeout",	no_argument,	NULL, 'n' },
 		{ "mntns",	no_argument,		NULL, ARG_MNTNS },
 		{ "pidns",	no_argument,		NULL, ARG_PIDNS },
 		{ "userns",	no_argument,		NULL, ARG_USERNS },
@@ -882,75 +923,98 @@ int main(int argc, char *argv[])
 
 	srand(time(NULL));
 
-	if (strcmp(exec, "kdbus-test") != 0) {
-		kdbus_args->test = exec;
-	}
+	bool gotT = 0;
 
-	while ((t = getopt_long(argc, argv, "hxfm:r:t:b:w:a", options, NULL)) >= 0) {
+	while ((t = getopt_long(argc, argv, "xhtflnm:R:b:w:a:", options, NULL)) >= 0) {
 		switch (t) {
 		case 'x':
-			kdbus_args->loop = 1;
+			kdbus_args.loop = 1;
 			break;
 
 		case 'm':
-			kdbus_args->module = optarg;
+			kdbus_args.module = optarg;
 			break;
 
-		case 'r':
-			kdbus_args->root = optarg;
+		case 'R':
+			kdbus_args.root = optarg;
 			break;
 
 		case 't':
-			kdbus_args->test = optarg;
+			gotT = 1;
 			break;
 
 		case 'b':
-			kdbus_args->busname = optarg;
+			kdbus_args.busname = optarg;
 			break;
 
 		case 'w':
-			kdbus_args->wait = strtol(optarg, NULL, 10);
+			kdbus_args.wait = strtol(optarg, NULL, 10);
 			break;
 
 		case 'f':
-			kdbus_args->fork = 1;
+			kdbus_args.fork = 1;
 			break;
 
 		case 'a':
-			kdbus_args->tap_output = 1;
+			kdbus_args.tap_output = 1;
 			break;
 
+		case 'n':
+			kdbus_args.no_timeout = 1;
+			break;
+
+		case 'l':
+			{
+				unsigned i = 0;
+				do {
+					const struct kdbus_test *t = &tests[i];
+					printf("%s;%s\n", t->name, t->desc);
+				} while (++i < TABSIZE(tests)-1);
+			}
+			return 0;
+
 		case ARG_MNTNS:
-			kdbus_args->mntns = true;
+			kdbus_args.mntns = true;
 			break;
 
 		case ARG_PIDNS:
-			kdbus_args->pidns = true;
+			kdbus_args.pidns = true;
 			break;
 
 		case ARG_USERNS:
-			kdbus_args->userns = true;
+			kdbus_args.userns = true;
 			break;
 
 		case ARG_UIDMAP:
-			kdbus_args->uid_map = optarg;
+			kdbus_args.uid_map = optarg;
 			break;
 
 		case ARG_GIDMAP:
-			kdbus_args->gid_map = optarg;
+			kdbus_args.gid_map = optarg;
 			break;
 
-		default:
 		case 'h':
 			usage(argv[0]);
+
+		default:;
 		}
 	}
 
-	ret = start_tests(kdbus_args);
+	if ((kdbus_args.nTests = argc-optind)) {
+		kdbus_args.tests = (char const * const *)&argv[optind];
+		if (1 < kdbus_args.nTests || !gotT)
+			kdbus_args.fork = 1;
+	}
+
+	if (!kdbus_args.root) {
+		snprintf(fspath, sizeof(fspath), "/sys/fs/%s",
+			 kdbus_args.module);
+		kdbus_args.root = fspath;
+	}
+
+	ret = start_tests(&kdbus_args);
 	if (ret == TEST_ERR)
 		return EXIT_FAILURE;
 
-	free(kdbus_args);
-
 	return 0;
 }
diff --git a/tools/testing/selftests/kdbus/kdbus-test.h b/tools/testing/selftests/kdbus/kdbus-test.h
index 826b9f45bfdd..e0a6abc65c1f 100644
--- a/tools/testing/selftests/kdbus/kdbus-test.h
+++ b/tools/testing/selftests/kdbus/kdbus-test.h
@@ -1,11 +1,14 @@
 #ifndef _TEST_KDBUS_H_
 #define _TEST_KDBUS_H_
 
+#include <pthread.h>
+#include <sys/syscall.h>
+#include "kdbus-util.h"
+
 struct kdbus_test_env {
 	char *buspath;
 	const char *root;
 	const char *module;
-	const char *mask_param_path;
 	int control_fd;
 	struct kdbus_conn *conn;
 };
@@ -14,73 +17,97 @@ enum {
 	TEST_OK,
 	TEST_SKIP,
 	TEST_ERR,
+	TEST_TIME,
 };
 
-#define ASSERT_RETURN_VAL(cond, val)		\
-	if (!(cond)) {			\
-		fprintf(stderr,	"Assertion '%s' failed in %s(), %s:%d\n", \
-			#cond, __func__, __FILE__, __LINE__);	\
-		return val;	\
-	}
+#if 0
+	#define print_assert_success print
+#else
+	#define print_assert_success(...) do {} while (0)
+#endif
+
+#define PRINTF_FMT(...) _Generic((__VA_ARGS__),\
+	bool: "%d",\
+	int: "%d",\
+	long: "%ld",\
+	long long: "%lld",\
+	unsigned: "%u",\
+	unsigned long: "%lu",\
+	unsigned long long: "%llu",\
+	default: "%p")
+#define PRINTF_ARG(...) (_Generic((__VA_ARGS__),\
+	default: (__VA_ARGS__)))
 
-#define ASSERT_EXIT_VAL(cond, val)		\
-	if (!(cond)) {			\
-		fprintf(stderr, "Assertion '%s' failed in %s(), %s:%d\n", \
-			#cond, __func__, __FILE__, __LINE__);	\
-		_exit(val);	\
-	}
+#define _ASSERT_REL_(val0, val0s, relop, val1, val1s, onfailure) do {\
+	__auto_type const _ASSERT_RETURN_VAL_val0_ = (val0);\
+	__auto_type const _ASSERT_RETURN_VAL_val1_ = (val1);\
+	if (!(_ASSERT_RETURN_VAL_val0_ relop _ASSERT_RETURN_VAL_val1_)) {			\
+		/* must assemble format string in runtime because _Generic does not play well with string constant concatenation */\
+		char _ASSERT_REL_fmt_[sizeof("[tid %u] Assertion '(")+3+sizeof("=%s) %s (")+3+sizeof("=%s)' failed in %s(), %s:%d\n")];\
+		strcpy(_ASSERT_REL_fmt_, "[tid %u] Assertion '(");\
+		strcat(_ASSERT_REL_fmt_, PRINTF_FMT(_ASSERT_RETURN_VAL_val0_));\
+		strcat(_ASSERT_REL_fmt_, "=%s) %s (");\
+		strcat(_ASSERT_REL_fmt_, PRINTF_FMT(_ASSERT_RETURN_VAL_val1_));\
+		strcat(_ASSERT_REL_fmt_, "=%s)' failed in %s(), %s:%d\n");\
+		print(_ASSERT_REL_fmt_, syscall(SYS_gettid), PRINTF_ARG(_ASSERT_RETURN_VAL_val0_), val0s, #relop, PRINTF_ARG(_ASSERT_RETURN_VAL_val1_), val1s, __func__, __FILE__, __LINE__);\
+		onfailure;\
+	}\
+		else print_assert_success("Assertion '%s' SUCCEEDED in %s(), %s:%d\n", val0s " " #relop " " val1s, __func__, __FILE__, __LINE__);\
+} while (0)
 
-#define ASSERT_BREAK(cond)		\
-	if (!(cond)) {			\
-		fprintf(stderr, "Assertion '%s' failed in %s(), %s:%d\n", \
-			#cond, __func__, __FILE__, __LINE__);	\
-		break; \
-	}
+#define ASSERT_RETURN_VAL(val0, relop, val1, retval) _ASSERT_REL_(val0, #val0, relop, val1, #val1, return retval)
+#define ASSERT_EXIT_VAL(val0, relop, val1, retval)   _ASSERT_REL_(val0, #val0, relop, val1, #val1, exit(retval))
 
-#define ASSERT_RETURN(cond)		\
-	ASSERT_RETURN_VAL(cond, TEST_ERR)
+#define ASSERT_RETURN(val0, relop, val1) _ASSERT_REL_(val0, #val0, relop, val1, #val1, return TEST_ERR)
+#define ASSERT_EXIT(val0, relop, val1)   _ASSERT_REL_(val0, #val0, relop, val1, #val1, exit(TEST_ERR))
 
-#define ASSERT_EXIT(cond)		\
-	ASSERT_EXIT_VAL(cond, EXIT_FAILURE)
+#define ASSERT_ZERO(...)         _ASSERT_REL_(((typeof((__VA_ARGS__)))0), "0", ==, (__VA_ARGS__), #__VA_ARGS__, return TEST_ERR)
+#define ASSERT_NONZERO(...)      _ASSERT_REL_(((typeof((__VA_ARGS__)))0), "0", !=, (__VA_ARGS__), #__VA_ARGS__, return TEST_ERR)
+#define ASSERT_EXIT_ZERO(...)    _ASSERT_REL_(((typeof((__VA_ARGS__)))0), "0", ==, (__VA_ARGS__), #__VA_ARGS__, exit(TEST_ERR))
+#define ASSERT_EXIT_NONZERO(...) _ASSERT_REL_(((typeof((__VA_ARGS__)))0), "0", !=, (__VA_ARGS__), #__VA_ARGS__, exit(TEST_ERR))
 
-int kdbus_test_activator(struct kdbus_test_env *env);
-int kdbus_test_attach_flags(struct kdbus_test_env *env);
-int kdbus_test_benchmark(struct kdbus_test_env *env);
-int kdbus_test_benchmark_nomemfds(struct kdbus_test_env *env);
-int kdbus_test_benchmark_uds(struct kdbus_test_env *env);
-int kdbus_test_bus_make(struct kdbus_test_env *env);
-int kdbus_test_byebye(struct kdbus_test_env *env);
-int kdbus_test_chat(struct kdbus_test_env *env);
-int kdbus_test_conn_info(struct kdbus_test_env *env);
-int kdbus_test_conn_update(struct kdbus_test_env *env);
-int kdbus_test_daemon(struct kdbus_test_env *env);
-int kdbus_test_custom_endpoint(struct kdbus_test_env *env);
-int kdbus_test_fd_passing(struct kdbus_test_env *env);
-int kdbus_test_free(struct kdbus_test_env *env);
-int kdbus_test_hello(struct kdbus_test_env *env);
-int kdbus_test_match_bloom(struct kdbus_test_env *env);
-int kdbus_test_match_id_add(struct kdbus_test_env *env);
-int kdbus_test_match_id_remove(struct kdbus_test_env *env);
-int kdbus_test_match_replace(struct kdbus_test_env *env);
-int kdbus_test_match_name_add(struct kdbus_test_env *env);
-int kdbus_test_match_name_change(struct kdbus_test_env *env);
-int kdbus_test_match_name_remove(struct kdbus_test_env *env);
-int kdbus_test_message_basic(struct kdbus_test_env *env);
-int kdbus_test_message_prio(struct kdbus_test_env *env);
-int kdbus_test_message_quota(struct kdbus_test_env *env);
-int kdbus_test_memory_access(struct kdbus_test_env *env);
-int kdbus_test_metadata_ns(struct kdbus_test_env *env);
-int kdbus_test_monitor(struct kdbus_test_env *env);
-int kdbus_test_name_basic(struct kdbus_test_env *env);
-int kdbus_test_name_conflict(struct kdbus_test_env *env);
-int kdbus_test_name_queue(struct kdbus_test_env *env);
-int kdbus_test_policy(struct kdbus_test_env *env);
-int kdbus_test_policy_ns(struct kdbus_test_env *env);
-int kdbus_test_policy_priv(struct kdbus_test_env *env);
-int kdbus_test_send(struct kdbus_test_env *env);
-int kdbus_test_sync_byebye(struct kdbus_test_env *env);
-int kdbus_test_sync_reply(struct kdbus_test_env *env);
-int kdbus_test_timeout(struct kdbus_test_env *env);
-int kdbus_test_writable_pool(struct kdbus_test_env *env);
+wur int kdbus_test_activator(struct kdbus_test_env *env);
+wur int kdbus_test_benchmark(struct kdbus_test_env *env);
+wur int kdbus_test_benchmark_nomemfds(struct kdbus_test_env *env);
+wur int kdbus_test_benchmark_uds(struct kdbus_test_env *env);
+wur int kdbus_test_bus_make(struct kdbus_test_env *env);
+wur int kdbus_test_byebye(struct kdbus_test_env *env);
+wur int kdbus_test_chat(struct kdbus_test_env *env);
+wur int kdbus_test_conn_info(struct kdbus_test_env *env);
+wur int kdbus_test_conn_update(struct kdbus_test_env *env);
+wur int kdbus_test_daemon(struct kdbus_test_env *env);
+wur int kdbus_test_custom_endpoint(struct kdbus_test_env *env);
+wur int kdbus_test_fd_passing(struct kdbus_test_env *env);
+wur int kdbus_test_free(struct kdbus_test_env *env);
+wur int kdbus_test_hello(struct kdbus_test_env *env);
+wur int kdbus_test_match_bloom(struct kdbus_test_env *env);
+wur int kdbus_test_match_itemless(struct kdbus_test_env *env);
+wur int kdbus_test_match_id_add(struct kdbus_test_env *env);
+wur int kdbus_test_match_id_remove(struct kdbus_test_env *env);
+wur int kdbus_test_match_replace(struct kdbus_test_env *env);
+wur int kdbus_test_match_name_add(struct kdbus_test_env *env);
+wur int kdbus_test_match_name_change(struct kdbus_test_env *env);
+wur int kdbus_test_match_name_remove(struct kdbus_test_env *env);
+wur int kdbus_test_message_basic(struct kdbus_test_env *env);
+wur int kdbus_test_message_prio(struct kdbus_test_env *env);
+wur int kdbus_test_activator_quota(struct kdbus_test_env *env);
+wur int kdbus_test_message_quota(struct kdbus_test_env *env);
+wur int kdbus_test_memory_access(struct kdbus_test_env *env);
+wur int kdbus_test_metadata(struct kdbus_test_env *env);
+wur int kdbus_test_metadata_conn_info(struct kdbus_test_env *env);
+wur int kdbus_test_metadata_ns(struct kdbus_test_env *env);
+wur int kdbus_test_monitor(struct kdbus_test_env *env);
+wur int kdbus_test_name_basic(struct kdbus_test_env *env);
+wur int kdbus_test_name_conflict(struct kdbus_test_env *env);
+wur int kdbus_test_name_queue(struct kdbus_test_env *env);
+wur int kdbus_test_name_takeover(struct kdbus_test_env *env);
+wur int kdbus_test_policy(struct kdbus_test_env *env);
+wur int kdbus_test_policy_ns(struct kdbus_test_env *env);
+wur int kdbus_test_policy_priv(struct kdbus_test_env *env);
+wur int kdbus_test_sync_byebye(struct kdbus_test_env *env);
+wur int kdbus_test_sync_reply(struct kdbus_test_env *env);
+wur int kdbus_test_big_metadata(struct kdbus_test_env *env);
+wur int kdbus_test_timeout(struct kdbus_test_env *env);
+wur int kdbus_test_writable_pool(struct kdbus_test_env *env);
 
 #endif /* _TEST_KDBUS_H_ */
diff --git a/tools/testing/selftests/kdbus/kdbus-util.c b/tools/testing/selftests/kdbus/kdbus-util.c
index 6677dadd1109..49aa4b733963 100644
--- a/tools/testing/selftests/kdbus/kdbus-util.c
+++ b/tools/testing/selftests/kdbus/kdbus-util.c
@@ -29,7 +29,6 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <linux/unistd.h>
-#include <linux/memfd.h>
 
 #ifndef __NR_memfd_create
   #ifdef __x86_64__
@@ -44,6 +43,7 @@
 #include "kdbus-api.h"
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
+#include "kdbus-test.h"
 
 #ifndef F_ADD_SEALS
 #define F_LINUX_SPECIFIC_BASE	1024
@@ -56,9 +56,12 @@
 #define F_SEAL_WRITE    0x0008  /* prevent writes */
 #endif
 
+/* maximum number of well-known names per connection */
+#define KDBUS_CONN_MAX_NAMES			256
+
 int kdbus_util_verbose = true;
 
-int kdbus_sysfs_get_parameter_mask(const char *path, uint64_t *mask)
+wur int kdbus_sysfs_get_parameter_mask(const char *path, uint64_t *mask)
 {
 	int ret;
 	FILE *file;
@@ -90,7 +93,7 @@ int kdbus_sysfs_get_parameter_mask(const char *path, uint64_t *mask)
 	return 0;
 }
 
-int kdbus_sysfs_set_parameter_mask(const char *path, uint64_t mask)
+wur int kdbus_sysfs_set_parameter_mask(const char *path, uint64_t mask)
 {
 	int ret;
 	FILE *file;
@@ -113,9 +116,8 @@ int kdbus_sysfs_set_parameter_mask(const char *path, uint64_t mask)
 	return ret > 0 ? 0 : ret;
 }
 
-int kdbus_create_bus(int control_fd, const char *name,
-		     uint64_t req_meta, uint64_t owner_meta,
-		     char **path)
+wur int kdbus_create_bus(int control_fd, const char *name,
+		     uint64_t owner_meta, char **path)
 {
 	struct {
 		struct kdbus_cmd cmd;
@@ -127,12 +129,12 @@ int kdbus_create_bus(int control_fd, const char *name,
 			struct kdbus_bloom_parameter bloom;
 		} bp;
 
-		/* required and owner metadata items */
+		/* owner metadata items */
 		struct {
 			uint64_t size;
 			uint64_t type;
 			uint64_t flags;
-		} attach[2];
+		} attach;
 
 		/* name item */
 		struct {
@@ -141,7 +143,7 @@ int kdbus_create_bus(int control_fd, const char *name,
 			char str[64];
 		} name;
 	} bus_make;
-	int ret = 0;
+	int ret;
 
 	memset(&bus_make, 0, sizeof(bus_make));
 	bus_make.bp.size = sizeof(bus_make.bp);
@@ -152,13 +154,9 @@ int kdbus_create_bus(int control_fd, const char *name,
 	snprintf(bus_make.name.str, sizeof(bus_make.name.str),
 		 "%u-%s", getuid(), name);
 
-	bus_make.attach[0].type = KDBUS_ITEM_ATTACH_FLAGS_RECV;
-	bus_make.attach[0].size = sizeof(bus_make.attach[0]);
-	bus_make.attach[0].flags = req_meta;
-
-	bus_make.attach[1].type = KDBUS_ITEM_ATTACH_FLAGS_SEND;
-	bus_make.attach[1].size = sizeof(bus_make.attach[0]);
-	bus_make.attach[1].flags = owner_meta;
+	bus_make.attach.type = KDBUS_ITEM_ATTACH_FLAGS_SEND;
+	bus_make.attach.size = sizeof(bus_make.attach);
+	bus_make.attach.flags = owner_meta;
 
 	bus_make.name.type = KDBUS_ITEM_MAKE_NAME;
 	bus_make.name.size = KDBUS_ITEM_HEADER_SIZE +
@@ -167,21 +165,16 @@ int kdbus_create_bus(int control_fd, const char *name,
 	bus_make.cmd.flags = KDBUS_MAKE_ACCESS_WORLD;
 	bus_make.cmd.size = sizeof(bus_make.cmd) +
 			     bus_make.bp.size +
-			     bus_make.attach[0].size +
-			     bus_make.attach[1].size +
+			     bus_make.attach.size +
 			     bus_make.name.size;
 
-	if (control_fd != -1) {
-		kdbus_printf(
-			"Creating bus with name >%s< on control fd %d ...\n",
-			name, control_fd);
+	kdbus_printf("Creating bus with name >%s< on control fd %d ...\n",
+		     name, control_fd);
 
-		ret = kdbus_cmd_bus_make(control_fd, &bus_make.cmd);
-		if (ret < 0) {
-			kdbus_printf("--- error when making bus: %d (%m)\n",
-				     ret);
-			return ret;
-		}
+	ret = kdbus_cmd_bus_make(control_fd, &bus_make.cmd);
+	if (ret < 0) {
+		kdbus_printf("--- error when making bus: %d (%m)\n", ret);
+		return ret;
 	}
 
 	if (ret == 0 && path)
@@ -190,7 +183,7 @@ int kdbus_create_bus(int control_fd, const char *name,
 	return ret;
 }
 
-struct kdbus_conn *
+wur struct kdbus_conn *
 kdbus_hello(const char *path, uint64_t flags,
 	    const struct kdbus_item *item, size_t item_size)
 {
@@ -247,28 +240,34 @@ kdbus_hello(const char *path, uint64_t flags,
 
 	cmd_free.size = sizeof(cmd_free);
 	cmd_free.offset = h.hello.offset;
-	kdbus_cmd_free(fd, &cmd_free);
+	ret = kdbus_cmd_free(fd, &cmd_free);
+	if (ret < 0 && !(flags & KDBUS_HELLO_POLICY_HOLDER && -EOPNOTSUPP == ret)) { /* free not supported for policy holders */
+		print("hello: KDBUS_CMD_FREE err(%d)\n", ret);
+		return NULL;
+	}
 
-	conn = malloc(sizeof(*conn));
+	conn = alloc(sizeof(*conn));
 	if (!conn) {
-		kdbus_printf("unable to malloc()!?\n");
+		kdbus_printf("unable to alloc()!?\n");
 		return NULL;
 	}
 
 	conn->buf = mmap(NULL, POOL_SIZE, PROT_READ, MAP_SHARED, fd, 0);
 	if (conn->buf == MAP_FAILED) {
 		free(conn);
-		close(fd);
+		CLOSE(fd);
 		kdbus_printf("--- error mmap (%m)\n");
 		return NULL;
 	}
 
 	conn->fd = fd;
 	conn->id = h.hello.id;
+	_Static_assert((typeof(conn->attach_flags_recv))_KDBUS_ATTACH_ALL == _KDBUS_ATTACH_ALL, "kdbus_conn::attach_flags_recv too narrow for _KDBUS_ATTACH_ALL");
+	conn->attach_flags_recv = _KDBUS_ATTACH_ALL;
 	return conn;
 }
 
-struct kdbus_conn *
+wur struct kdbus_conn *
 kdbus_hello_registrar(const char *path, const char *name,
 		      const struct kdbus_policy_access *access,
 		      size_t num_access, uint64_t flags)
@@ -302,7 +301,7 @@ kdbus_hello_registrar(const char *path, const char *name,
 	return kdbus_hello(path, flags, items, size);
 }
 
-struct kdbus_conn *kdbus_hello_activator(const char *path, const char *name,
+wur struct kdbus_conn *kdbus_hello_activator(const char *path, const char *name,
 				   const struct kdbus_policy_access *access,
 				   size_t num_access)
 {
@@ -310,7 +309,7 @@ struct kdbus_conn *kdbus_hello_activator(const char *path, const char *name,
 				     KDBUS_HELLO_ACTIVATOR);
 }
 
-bool kdbus_item_in_message(struct kdbus_msg *msg, uint64_t type)
+wur bool kdbus_item_in_message(struct kdbus_msg *msg, uint64_t type)
 {
 	const struct kdbus_item *item;
 
@@ -321,7 +320,7 @@ bool kdbus_item_in_message(struct kdbus_msg *msg, uint64_t type)
 	return false;
 }
 
-int kdbus_bus_creator_info(struct kdbus_conn *conn,
+wur int kdbus_bus_creator_info(struct kdbus_conn *conn,
 			   uint64_t flags,
 			   uint64_t *offset)
 {
@@ -343,55 +342,85 @@ int kdbus_bus_creator_info(struct kdbus_conn *conn,
 	if (offset)
 		*offset = cmd->offset;
 	else
-		kdbus_free(conn, cmd->offset);
+		ret = kdbus_free(conn, cmd->offset);
 
-	return 0;
+	return ret;
 }
 
-int kdbus_conn_info(struct kdbus_conn *conn, uint64_t id,
+wur static int kdbus_info_verify(struct kdbus_info *info, unsigned attach_flags);
+
+wur int kdbus_conn_info(struct kdbus_conn *conn, uint64_t id,
 		    const char *name, uint64_t flags,
 		    uint64_t *offset)
 {
 	struct kdbus_cmd_info *cmd;
 	size_t size = sizeof(*cmd);
+	size_t full_size;
 	struct kdbus_info *info;
 	int ret;
 
+	/*print("call prepared 0\n");*/
+
 	if (name)
 		size += KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
 
-	cmd = alloca(size);
-	memset(cmd, 0, size);
+	/*print("call prepared 1\n");*/
+
+	full_size = KDBUS_ALIGN8(size) + 1000;
+
+	/*print("call prepared 2\n");*/
+
+	cmd = malloc(full_size);
+	if (!cmd)
+		return -ENOMEM;
+	/*print("call prepared 3\n");*/
+	memset(cmd, 0, full_size);
+	/*print("call prepared 4\n");*/
 	cmd->size = size;
+	/*print("call prepared 5\n");*/
 	cmd->attach_flags = flags;
+	/*print("call prepared 6\n");*/
 
 	if (name) {
+		/*print("call prepared 7\n");*/
 		cmd->items[0].size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
+		/*print("call prepared 8\n");*/
 		cmd->items[0].type = KDBUS_ITEM_NAME;
-		strcpy(cmd->items[0].str, name);
+		/*print("call prepared 9 cmd(%p) cmd->items[0].str(%p) full_size(%u) len(%u) name(%s)\n", cmd, cmd->items[0].str, (unsigned)full_size, (unsigned)strlen(name), name);*/
+
+		/* tizen 3.0 strcpy reports buffer overflow for no apparent reason - memcpy doesn't */
+		memcpy(cmd->items[0].str, name, strlen(name));
+		/*strcpy(cmd->items[0].str, name);*/
 	} else {
+		/*print("call prepared 10\n");*/
 		cmd->id = id;
 	}
 
+	/*print("call prepared 11\n");*/
+
 	ret = kdbus_cmd_conn_info(conn->fd, cmd);
 	if (ret < 0) {
 		kdbus_printf("--- error when requesting info: %d (%m)\n", ret);
+		free(cmd);
 		return ret;
 	}
 
 	info = (struct kdbus_info *) (conn->buf + cmd->offset);
-	if (info->size != cmd->info_size) {
+	if (KDBUS_ALIGN8(info->size) != cmd->info_size) {
 		kdbus_printf("%s(): size mismatch: %d != %d\n", __func__,
 				(int) info->size, (int) cmd->info_size);
+		free(cmd);
 		return -EIO;
 	}
 
-	if (offset)
+	if (offset) {
 		*offset = cmd->offset;
-	else
-		kdbus_free(conn, cmd->offset);
+		ASSERT_ZERO(kdbus_info_verify(info, flags));
+	} else
+		ret = kdbus_free(conn, cmd->offset);
 
-	return 0;
+	free(cmd);
+	return ret;
 }
 
 void kdbus_conn_free(struct kdbus_conn *conn)
@@ -399,41 +428,39 @@ void kdbus_conn_free(struct kdbus_conn *conn)
 	if (!conn)
 		return;
 
-	if (conn->buf)
-		munmap(conn->buf, POOL_SIZE);
+	if (conn->buf && munmap(conn->buf, POOL_SIZE))
+		fail("munmap(%p) err(%d)", conn->buf, errno);
 
-	if (conn->fd >= 0)
-		close(conn->fd);
+	if (conn->fd >= 0 && close(conn->fd))
+		fail("close(%d) err(%d)", conn->fd, errno);
 
 	free(conn);
 }
 
-int sys_memfd_create(const char *name, __u64 size)
+wur int sys_memfd_create(const char *name, __u64 size)
 {
 	int ret, fd;
 
-	ret = syscall(__NR_memfd_create, name, MFD_ALLOW_SEALING);
-	if (ret < 0)
-		return ret;
-
-	fd = ret;
+	fd = syscall(__NR_memfd_create, name, 2/*MFD_ALLOW_SEALING*/);
+	if (fd < 0)
+		return fd;
 
 	ret = ftruncate(fd, size);
 	if (ret < 0) {
-		close(fd);
+		CLOSE(fd);
 		return ret;
 	}
 
 	return fd;
 }
 
-int sys_memfd_seal_set(int fd)
+wur int sys_memfd_seal_set(int fd)
 {
 	return fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK |
 			 F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL);
 }
 
-off_t sys_memfd_get_size(int fd, off_t *size)
+wur off_t sys_memfd_get_size(int fd, off_t *size)
 {
 	struct stat stat;
 	int ret;
@@ -448,7 +475,7 @@ off_t sys_memfd_get_size(int fd, off_t *size)
 	return 0;
 }
 
-static int __kdbus_msg_send(const struct kdbus_conn *conn,
+static wur int __kdbus_msg_send(const struct kdbus_conn *conn,
 			    const char *name,
 			    uint64_t cookie,
 			    uint64_t flags,
@@ -456,12 +483,10 @@ static int __kdbus_msg_send(const struct kdbus_conn *conn,
 			    int64_t priority,
 			    uint64_t dst_id,
 			    uint64_t cmd_flags,
-			    int cancel_fd,
-			    int fds_count,
-			    int fds[])
+			    int cancel_fd)
 {
-	struct kdbus_cmd_send *cmd;
-	struct kdbus_msg *msg;
+	struct kdbus_cmd_send *cmd = NULL;
+	struct kdbus_msg *msg = NULL;
 	const char ref1[1024 * 128 + 3] = "0123456789_0";
 	const char ref2[] = "0123456789_1";
 	struct kdbus_item *item;
@@ -470,11 +495,7 @@ static int __kdbus_msg_send(const struct kdbus_conn *conn,
 	int memfd = -1;
 	int ret;
 
-	size = sizeof(*msg);
-	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-	size += fds_count > 0 ? KDBUS_ITEM_SIZE(sizeof(int) * fds_count) : 0;
+	size = sizeof(*msg) + 3 * KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
 
 	if (dst_id == KDBUS_DST_ID_BROADCAST)
 		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
@@ -488,14 +509,14 @@ static int __kdbus_msg_send(const struct kdbus_conn *conn,
 		if (write(memfd, "kdbus memfd 1234567", 19) != 19) {
 			ret = -errno;
 			kdbus_printf("writing to memfd failed: %m\n");
-			return ret;
+			goto out;
 		}
 
 		ret = sys_memfd_seal_set(memfd);
 		if (ret < 0) {
 			ret = -errno;
 			kdbus_printf("memfd sealing failed: %m\n");
-			return ret;
+			goto out;
 		}
 
 		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
@@ -504,11 +525,11 @@ static int __kdbus_msg_send(const struct kdbus_conn *conn,
 	if (name)
 		size += KDBUS_ITEM_SIZE(strlen(name) + 1);
 
-	msg = malloc(size);
+	msg = alloc(size);
 	if (!msg) {
 		ret = -errno;
-		kdbus_printf("unable to malloc()!?\n");
-		return ret;
+		kdbus_printf("unable to alloc()!?\n");
+		goto out;
 	}
 
 	if (dst_id == KDBUS_DST_ID_BROADCAST)
@@ -526,7 +547,7 @@ static int __kdbus_msg_send(const struct kdbus_conn *conn,
 	if (timeout) {
 		ret = clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
 		if (ret < 0)
-			return ret;
+			goto out;
 
 		msg->timeout_ns = now.tv_sec * 1000000000ULL +
 				  now.tv_nsec + timeout;
@@ -572,23 +593,17 @@ static int __kdbus_msg_send(const struct kdbus_conn *conn,
 	}
 	item = KDBUS_ITEM_NEXT(item);
 
-	if (fds_count > 0) {
-		item->type = KDBUS_ITEM_FDS;
-		item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(int) * fds_count;
-		memcpy(&item->fds, fds, sizeof(int) * fds_count);
-		item = KDBUS_ITEM_NEXT(item);
-	}
-
 	size = sizeof(*cmd);
 	if (cancel_fd != -1)
 		size += KDBUS_ITEM_SIZE(sizeof(cancel_fd));
 
-	cmd = malloc(size);
+	cmd = alloc(size);
 	if (!cmd) {
 		ret = -errno;
-		kdbus_printf("unable to malloc(%ld)!?\n", (long)size);
-		return ret;
+		kdbus_printf("unable to alloc()!?\n");
+		goto out;
 	}
+
 	cmd->size = size;
 	cmd->flags = cmd_flags;
 	cmd->msg_address = (uintptr_t)msg;
@@ -602,54 +617,54 @@ static int __kdbus_msg_send(const struct kdbus_conn *conn,
 		item = KDBUS_ITEM_NEXT(item);
 	}
 
-
 	ret = kdbus_cmd_send(conn->fd, cmd);
-	if (memfd >= 0)
-		close(memfd);
-
 	if (ret < 0) {
 		kdbus_printf("error sending message: %d (%m)\n", ret);
-		return ret;
+		goto out;
 	}
 
 	if (cmd_flags & KDBUS_SEND_SYNC_REPLY) {
 		struct kdbus_msg *reply;
+		int dumpret;
 
 		kdbus_printf("SYNC REPLY @offset %llu:\n", cmd->reply.offset);
 		reply = (struct kdbus_msg *)(conn->buf + cmd->reply.offset);
-		kdbus_msg_dump(conn, reply);
+		dumpret = kdbus_msg_dump(reply);
 
 		kdbus_msg_free(reply);
 
 		ret = kdbus_free(conn, cmd->reply.offset);
-		if (ret < 0)
-			return ret;
+		if (!ret)
+			ret = dumpret;
 	}
 
+out:
 	free(msg);
 	free(cmd);
 
-	return 0;
+	if (memfd >= 0)
+		CLOSE(memfd);
+
+	return ret < 0 ? ret : 0;
 }
 
-int kdbus_msg_send(const struct kdbus_conn *conn, const char *name,
+wur int kdbus_msg_send(const struct kdbus_conn *conn, const char *name,
 		   uint64_t cookie, uint64_t flags, uint64_t timeout,
-		   int64_t priority, uint64_t dst_id, int fds_count, int fds[])
+		   int64_t priority, uint64_t dst_id)
 {
 	return __kdbus_msg_send(conn, name, cookie, flags, timeout, priority,
-				dst_id, 0, -1, fds_count, fds);
+				dst_id, 0, -1);
 }
 
-int kdbus_msg_send_sync(const struct kdbus_conn *conn, const char *name,
+wur int kdbus_msg_send_sync(const struct kdbus_conn *conn, const char *name,
 			uint64_t cookie, uint64_t flags, uint64_t timeout,
 			int64_t priority, uint64_t dst_id, int cancel_fd)
 {
 	return __kdbus_msg_send(conn, name, cookie, flags, timeout, priority,
-				dst_id, KDBUS_SEND_SYNC_REPLY, cancel_fd,
-				0, NULL);
+				dst_id, KDBUS_SEND_SYNC_REPLY, cancel_fd);
 }
 
-int kdbus_msg_send_reply(const struct kdbus_conn *conn,
+wur int kdbus_msg_send_reply(const struct kdbus_conn *conn,
 			 uint64_t reply_cookie,
 			 uint64_t dst_id)
 {
@@ -663,9 +678,9 @@ int kdbus_msg_send_reply(const struct kdbus_conn *conn,
 	size = sizeof(struct kdbus_msg);
 	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
 
-	msg = malloc(size);
+	msg = alloc(size);
 	if (!msg) {
-		kdbus_printf("unable to malloc()!?\n");
+		kdbus_printf("unable to alloc()!?\n");
 		return -ENOMEM;
 	}
 
@@ -696,7 +711,7 @@ int kdbus_msg_send_reply(const struct kdbus_conn *conn,
 	return ret;
 }
 
-static char *msg_id(uint64_t id, char *buf)
+static wur char *msg_id(uint64_t id, char *buf)
 {
 	if (id == 0)
 		return "KERNEL";
@@ -706,8 +721,7 @@ static char *msg_id(uint64_t id, char *buf)
 	return buf;
 }
 
-int kdbus_msg_dump(const struct kdbus_conn *conn, const struct kdbus_msg *msg)
-{
+wur int kdbus_msg_dump(const struct kdbus_msg *msg) {
 	const struct kdbus_item *item = msg->items;
 	char buf_src[32];
 	char buf_dst[32];
@@ -720,8 +734,9 @@ int kdbus_msg_dump(const struct kdbus_conn *conn, const struct kdbus_msg *msg)
 	else
 		cookie_reply = msg->cookie_reply;
 
-	kdbus_printf("MESSAGE: %s (%llu bytes) flags=0x%08llx, %s → %s, "
+	kdbus_printf("MESSAGE(%p): %s (%llu bytes) flags=0x%08llx, %s → %s, "
 		     "cookie=%llu, timeout=%llu cookie_reply=%llu priority=%lli\n",
+		msg,
 		enum_PAYLOAD(msg->payload_type), (unsigned long long)msg->size,
 		(unsigned long long)msg->flags,
 		msg_id(msg->src_id, buf_src), msg_id(msg->dst_id, buf_dst),
@@ -732,8 +747,7 @@ int kdbus_msg_dump(const struct kdbus_conn *conn, const struct kdbus_msg *msg)
 		if (item->size < KDBUS_ITEM_HEADER_SIZE) {
 			kdbus_printf("  +%s (%llu bytes) invalid data record\n",
 				     enum_MSG(item->type), item->size);
-			ret = -EINVAL;
-			break;
+			return -EINVAL;
 		}
 
 		switch (item->type) {
@@ -783,10 +797,10 @@ int kdbus_msg_dump(const struct kdbus_conn *conn, const struct kdbus_msg *msg)
 				break;
 			}
 
-			kdbus_printf("  +%s (%llu bytes) fd=%i size=%llu filesize=%llu '%s'\n",
+			kdbus_printf("  +%s (%llu bytes) fd=%i size=%llu filesize=%llu '0x%llx'\n",
 			       enum_MSG(item->type), item->size, item->memfd.fd,
 			       (unsigned long long)item->memfd.size,
-			       (unsigned long long)size, buf);
+			       (unsigned long long)size, (unsigned long long)(size >= 8 ? *(unsigned long long *)buf : size >= 4 ? *(unsigned *)buf : *buf));
 			munmap(buf, item->memfd.size);
 			break;
 		}
@@ -966,21 +980,218 @@ void kdbus_msg_free(struct kdbus_msg *msg)
 		switch (item->type) {
 		/* close all memfds */
 		case KDBUS_ITEM_PAYLOAD_MEMFD:
-			close(item->memfd.fd);
+			if (-1 != item->memfd.fd)
+				CLOSE(item->memfd.fd);
 			break;
 		case KDBUS_ITEM_FDS:
 			nfds = (item->size - KDBUS_ITEM_HEADER_SIZE) /
 				sizeof(int);
 
 			for (i = 0; i < nfds; i++)
-				close(item->fds[i]);
+				if (-1 != item->fds[i])
+					CLOSE(item->fds[i]);
 
 			break;
 		}
 	}
 }
 
-int kdbus_msg_recv(struct kdbus_conn *conn,
+wur static int verify_padding(char const *b, unsigned off)
+{
+	while (off%8) {
+		ASSERT_ZERO((unsigned)b[off]);
+		++off;
+	}
+	return 0;
+}
+
+wur static int verify_string(unsigned size, char const *s)
+{
+	unsigned len;
+	ASSERT_NONZERO(size);
+	len = strlen(s)+1;
+	ASSERT_RETURN(len,==,size);
+	ASSERT_ZERO(verify_padding(s, len));
+	return 0;
+}
+wur static int verify_string_array(unsigned size, char const *s)
+{
+	unsigned off=0;
+	ASSERT_NONZERO(size);
+	while (size) {
+		unsigned len = strlen(s+off);
+		if (!len)
+			break;
+		++len;
+		ASSERT_RETURN(len,<=,size);
+		size -= len;
+		off += len;
+	}
+	ASSERT_ZERO(verify_padding(s, off));
+	return 0;
+}
+
+#define VERIFY_DECL\
+	const struct kdbus_item *item;\
+	unsigned item_count[14];\
+	unsigned i;\
+	memset(item_count, 0, sizeof(item_count));
+#define VERIFY_DECL_INLOOP\
+	unsigned idx;\
+	unsigned size;\
+	ASSERT_RETURN(item->size,>=,2*sizeof(uint64_t));\
+	ASSERT_RETURN((unsigned)item->size,==,item->size);\
+	size = item->size - 2*sizeof(uint64_t);
+#define VERIFY_META_CASES\
+	/* metadata */\
+	case KDBUS_ITEM_CREDS:\
+		ASSERT_RETURN(size,==,sizeof(struct kdbus_creds));\
+		break;\
+	case KDBUS_ITEM_PIDS:\
+		ASSERT_RETURN(size,==,sizeof(struct kdbus_pids));\
+		break;\
+	case KDBUS_ITEM_AUDIT:\
+		ASSERT_RETURN(size,==,sizeof(struct kdbus_audit));\
+		break;\
+	case KDBUS_ITEM_AUXGROUPS:\
+	case KDBUS_ITEM_CAPS:\
+		ASSERT_ZERO(size%sizeof(uint32_t));\
+		break;\
+	case KDBUS_ITEM_OWNED_NAME:\
+		ASSERT_ZERO(verify_string(size-offsetof(typeof(item->name), name), item->name.name));\
+		break;\
+	case KDBUS_ITEM_TID_COMM:\
+	case KDBUS_ITEM_PID_COMM:\
+	case KDBUS_ITEM_EXE:\
+	case KDBUS_ITEM_CGROUP:\
+	case KDBUS_ITEM_SECLABEL:\
+	case KDBUS_ITEM_CONN_DESCRIPTION:\
+		ASSERT_ZERO(verify_string(size, item->str));\
+		break;\
+	case KDBUS_ITEM_CMDLINE:\
+		ASSERT_ZERO(verify_string_array(size, item->str));\
+		break;
+#define VERIFY_META do {\
+	ASSERT_RETURN(item->type,>=,(uint64_t)_KDBUS_ITEM_ATTACH_BASE);\
+	idx = item->type - _KDBUS_ITEM_ATTACH_BASE;\
+	ASSERT_RETURN(idx,<,sizeof(item_count)/sizeof(*item_count));\
+	ASSERT_NONZERO(attach_flags & 1<<idx);\
+	if (KDBUS_ITEM_OWNED_NAME != item->type)\
+		ASSERT_ZERO(item_count[idx]);\
+	else\
+		ASSERT_RETURN(item_count[idx],<,(uint64_t)KDBUS_CONN_MAX_NAMES);\
+	++item_count[idx];\
+} while (0)
+#define VERIFY_FINAL_ASSERT do {\
+	for (i=0; i<TABSIZE(item_count); ++i) {\
+		if (attach_flags & 1<<i &&\
+			KDBUS_ITEM_TIMESTAMP-_KDBUS_ITEM_ATTACH_BASE != i && /* nameless connections happen */\
+			KDBUS_ITEM_OWNED_NAME-_KDBUS_ITEM_ATTACH_BASE != i && /* nameless connections happen */\
+			KDBUS_ITEM_CONN_DESCRIPTION-_KDBUS_ITEM_ATTACH_BASE != i && /* defining a connection description is optional */\
+			KDBUS_ITEM_AUDIT-_KDBUS_ITEM_ATTACH_BASE != i) /* missing if CONFIG_AUDITSYSCALL not defined */\
+			if (!item_count[i]) ASSERT_ZERO(i+1); /*hack to make i visible*/\
+	}\
+} while (0)
+
+wur static int kdbus_info_verify(struct kdbus_info *info, unsigned attach_flags)
+{
+	VERIFY_DECL;
+
+	KDBUS_ITEM_FOREACH(item, info, items) {
+		VERIFY_DECL_INLOOP;
+		switch(item->type) {
+			VERIFY_META_CASES;
+			default: ASSERT_ZERO(item->type ?: (uint64_t)-1);
+		}
+		VERIFY_META;
+	}
+
+	VERIFY_FINAL_ASSERT;
+
+	return 0;
+}
+
+wur static int kdbus_msg_verify(struct kdbus_msg *msg, unsigned attach_flags)
+{
+	bool user = false;
+
+	VERIFY_DECL;
+
+	if (msg->payload_type != KDBUS_PAYLOAD_KERNEL) {
+		ASSERT_RETURN(msg->payload_type,==,KDBUS_PAYLOAD_DBUS);
+		user = true;
+	}
+
+	KDBUS_ITEM_FOREACH(item, msg, items) {
+		VERIFY_DECL_INLOOP;
+
+		switch(item->type) {
+			case KDBUS_ITEM_TIMESTAMP:
+				ASSERT_RETURN(size,==,sizeof(struct kdbus_timestamp));
+				break;
+			VERIFY_META_CASES;
+
+			/* user items */
+			case KDBUS_ITEM_PAYLOAD_OFF:
+				ASSERT_NONZERO(user);
+				ASSERT_RETURN(size,==,sizeof(struct kdbus_vec));
+				continue;
+			case KDBUS_ITEM_PAYLOAD_MEMFD:
+				ASSERT_NONZERO(user);
+				ASSERT_RETURN(size,==,sizeof(struct kdbus_memfd));
+				continue;
+			case KDBUS_ITEM_FDS:
+				ASSERT_NONZERO(user);
+				ASSERT_ZERO(size%sizeof(int));
+				continue;
+			case KDBUS_ITEM_DST_NAME:
+				ASSERT_NONZERO(user);
+				ASSERT_ZERO(verify_string(size, item->str));
+				continue;
+
+			/* kernel items */
+			case KDBUS_ITEM_NAME_ADD:
+			case KDBUS_ITEM_NAME_REMOVE:
+			case KDBUS_ITEM_NAME_CHANGE:
+				ASSERT_ZERO(user);
+				ASSERT_RETURN(size,>=,sizeof(struct kdbus_notify_name_change));
+				ASSERT_ZERO(verify_string(size-sizeof(struct kdbus_notify_name_change), item->name_change.name));
+				continue;
+			case KDBUS_ITEM_ID_ADD:
+			case KDBUS_ITEM_ID_REMOVE:
+				ASSERT_ZERO(user);
+				ASSERT_RETURN(size,==,sizeof(struct kdbus_notify_id_change));
+				continue;
+			case KDBUS_ITEM_REPLY_TIMEOUT:
+			case KDBUS_ITEM_REPLY_DEAD:
+				ASSERT_ZERO(user);
+				ASSERT_ZERO(size);
+				continue;
+
+			case KDBUS_ITEM_BLOOM_FILTER:
+				kdbus_printf("WARNING! KDBUS_ITEM_BLOOM_FILTER passed from the kernel\n");
+				continue;
+
+			default:
+				ASSERT_ZERO(item->type ?: (uint64_t)-1);
+		}
+		if (KDBUS_ITEM_TIMESTAMP != item->type)
+			ASSERT_NONZERO(user);
+		VERIFY_META;
+	}
+
+	/* we're requesting all metadata and that's what we mandate */
+	if (user) {
+		VERIFY_FINAL_ASSERT;
+		if (attach_flags & 1 << (KDBUS_ITEM_TIMESTAMP-_KDBUS_ITEM_ATTACH_BASE))
+			ASSERT_NONZERO(item_count[KDBUS_ITEM_TIMESTAMP-_KDBUS_ITEM_ATTACH_BASE]);
+	} else if (attach_flags & 1 << (KDBUS_ITEM_TIMESTAMP-_KDBUS_ITEM_ATTACH_BASE))
+		ASSERT_NONZERO(item_count[KDBUS_ITEM_TIMESTAMP-_KDBUS_ITEM_ATTACH_BASE]);
+
+	return 0;
+}
+
+wur int kdbus_msg_recv(struct kdbus_conn *conn,
 		   struct kdbus_msg **msg_out,
 		   uint64_t *offset)
 {
@@ -993,7 +1204,8 @@ int kdbus_msg_recv(struct kdbus_conn *conn,
 		return ret;
 
 	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
-	ret = kdbus_msg_dump(conn, msg);
+	ret = kdbus_msg_dump(msg);
+	ASSERT_ZERO(kdbus_msg_verify(msg, conn->attach_flags_recv));
 	if (ret < 0) {
 		kdbus_msg_free(msg);
 		return ret;
@@ -1021,7 +1233,7 @@ int kdbus_msg_recv(struct kdbus_conn *conn,
  * We must return -ETIMEDOUT, -ECONNREST, -EAGAIN and other errors.
  * We must return the result of kdbus_msg_recv()
  */
-int kdbus_msg_recv_poll(struct kdbus_conn *conn,
+wur int kdbus_msg_recv_poll(struct kdbus_conn *conn,
 			int timeout_ms,
 			struct kdbus_msg **msg_out,
 			uint64_t *offset)
@@ -1064,7 +1276,7 @@ int kdbus_msg_recv_poll(struct kdbus_conn *conn,
 	return ret;
 }
 
-int kdbus_free(const struct kdbus_conn *conn, uint64_t offset)
+wur int kdbus_free(const struct kdbus_conn *conn, uint64_t offset)
 {
 	struct kdbus_cmd_free cmd_free = {};
 	int ret;
@@ -1082,7 +1294,12 @@ int kdbus_free(const struct kdbus_conn *conn, uint64_t offset)
 	return 0;
 }
 
-int kdbus_name_acquire(struct kdbus_conn *conn,
+wur int kdbus_free_msg(struct kdbus_conn const *conn, struct kdbus_msg *msg)
+{
+	return kdbus_free(conn, (uintptr_t)msg - (uintptr_t)conn->buf);
+}
+
+wur int kdbus_name_acquire(struct kdbus_conn *conn,
 		       const char *name, uint64_t *flags)
 {
 	struct kdbus_cmd *cmd_name;
@@ -1106,7 +1323,7 @@ int kdbus_name_acquire(struct kdbus_conn *conn,
 
 	ret = kdbus_cmd_name_acquire(conn->fd, cmd_name);
 	if (ret < 0) {
-		kdbus_printf("error aquiring name: %s\n", strerror(-ret));
+		kdbus_printf("error acquiring name: %s\n", strerror(-ret));
 		return ret;
 	}
 
@@ -1119,7 +1336,7 @@ int kdbus_name_acquire(struct kdbus_conn *conn,
 	return 0;
 }
 
-int kdbus_name_release(struct kdbus_conn *conn, const char *name)
+wur int kdbus_name_release(struct kdbus_conn *conn, const char *name)
 {
 	struct kdbus_cmd *cmd_name;
 	size_t name_len = strlen(name) + 1;
@@ -1150,7 +1367,7 @@ int kdbus_name_release(struct kdbus_conn *conn, const char *name)
 	return 0;
 }
 
-int kdbus_list(struct kdbus_conn *conn, uint64_t flags)
+wur int kdbus_list(struct kdbus_conn *conn, uint64_t flags)
 {
 	struct kdbus_cmd_list cmd_list = {};
 	struct kdbus_info *list, *name;
@@ -1180,11 +1397,12 @@ int kdbus_list(struct kdbus_conn *conn, uint64_t flags)
 			if (item->type == KDBUS_ITEM_OWNED_NAME) {
 				n = item->name.name;
 				flags = item->name.flags;
-			}
 
-		kdbus_printf("%8llu flags=0x%08llx conn=0x%08llx '%s'\n",
-			     name->id, (unsigned long long) flags,
-			     name->flags, n);
+				kdbus_printf("%8llu flags=0x%08llx conn=0x%08llx '%s'\n",
+					     name->id,
+					     (unsigned long long) flags,
+					     name->flags, n);
+			}
 	}
 	kdbus_printf("\n");
 
@@ -1193,7 +1411,7 @@ int kdbus_list(struct kdbus_conn *conn, uint64_t flags)
 	return ret;
 }
 
-int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
+wur int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
 				   uint64_t attach_flags_send,
 				   uint64_t attach_flags_recv)
 {
@@ -1205,9 +1423,9 @@ int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
 	size = sizeof(struct kdbus_cmd);
 	size += KDBUS_ITEM_SIZE(sizeof(uint64_t)) * 2;
 
-	update = malloc(size);
+	update = alloc(size);
 	if (!update) {
-		kdbus_printf("error malloc: %m\n");
+		kdbus_printf("error alloc: %m\n");
 		return -ENOMEM;
 	}
 
@@ -1231,11 +1449,12 @@ int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
 		kdbus_printf("error conn update: %d (%m)\n", ret);
 
 	free(update);
+	conn->attach_flags_recv = attach_flags_recv;
 
 	return ret;
 }
 
-int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
+wur int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
 			     const struct kdbus_policy_access *access,
 			     size_t num_access)
 {
@@ -1248,9 +1467,9 @@ int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
 	size += KDBUS_ITEM_SIZE(strlen(name) + 1);
 	size += num_access * KDBUS_ITEM_SIZE(sizeof(struct kdbus_policy_access));
 
-	update = malloc(size);
+	update = alloc(size);
 	if (!update) {
-		kdbus_printf("error malloc: %m\n");
+		kdbus_printf("error alloc: %m\n");
 		return -ENOMEM;
 	}
 
@@ -1285,7 +1504,7 @@ int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
 	return ret;
 }
 
-int kdbus_add_match_id(struct kdbus_conn *conn, uint64_t cookie,
+wur int kdbus_add_match_id(struct kdbus_conn *conn, uint64_t cookie,
 		       uint64_t type, uint64_t id)
 {
 	struct {
@@ -1313,7 +1532,7 @@ int kdbus_add_match_id(struct kdbus_conn *conn, uint64_t cookie,
 	return ret;
 }
 
-int kdbus_add_match_empty(struct kdbus_conn *conn)
+wur int kdbus_add_match_empty(struct kdbus_conn *conn)
 {
 	struct {
 		struct kdbus_cmd_match cmd;
@@ -1336,7 +1555,7 @@ int kdbus_add_match_empty(struct kdbus_conn *conn)
 	return ret;
 }
 
-static int all_ids_are_mapped(const char *path)
+static wur int all_ids_are_mapped(const char *path)
 {
 	int ret;
 	FILE *file;
@@ -1374,7 +1593,7 @@ static int all_ids_are_mapped(const char *path)
 	return 0;
 }
 
-int all_uids_gids_are_mapped()
+wur int all_uids_gids_are_mapped(void)
 {
 	int ret;
 
@@ -1393,7 +1612,7 @@ int all_uids_gids_are_mapped()
 	return 1;
 }
 
-int drop_privileges(uid_t uid, gid_t gid)
+wur int drop_privileges(uid_t uid, gid_t gid)
 {
 	int ret;
 
@@ -1421,7 +1640,7 @@ int drop_privileges(uid_t uid, gid_t gid)
 	return ret;
 }
 
-uint64_t now(clockid_t clock)
+wur uint64_t now(clockid_t clock)
 {
 	struct timespec spec;
 
@@ -1429,7 +1648,7 @@ uint64_t now(clockid_t clock)
 	return spec.tv_sec * 1000ULL * 1000ULL * 1000ULL + spec.tv_nsec;
 }
 
-char *unique_name(const char *prefix)
+wur char *unique_name(const char *prefix)
 {
 	unsigned int i;
 	uint64_t u_now;
@@ -1464,8 +1683,7 @@ char *unique_name(const char *prefix)
 	return str;
 }
 
-static int do_userns_map_id(pid_t pid,
-			    const char *map_file,
+static wur int do_userns_map_id(const char *map_file,
 			    const char *map_id)
 {
 	int ret;
@@ -1504,11 +1722,11 @@ static int do_userns_map_id(pid_t pid,
 	ret = 0;
 
 out:
-	close(fd);
+	CLOSE(fd);
 	return ret;
 }
 
-int userns_map_uid_gid(pid_t pid,
+wur int userns_map_uid_gid(pid_t pid,
 		       const char *map_uid,
 		       const char *map_gid)
 {
@@ -1518,7 +1736,7 @@ int userns_map_uid_gid(pid_t pid,
 	snprintf(file_id, sizeof(file_id), "/proc/%ld/uid_map",
 		 (long) pid);
 
-	ret = do_userns_map_id(pid, file_id, map_uid);
+	ret = do_userns_map_id(file_id, map_uid);
 	if (ret < 0)
 		return ret;
 
@@ -1527,17 +1745,19 @@ int userns_map_uid_gid(pid_t pid,
 
 	fd = open(file_id, O_WRONLY);
 	if (fd >= 0) {
-		write(fd, "deny\n", 5);
-		close(fd);
+		ret = write(fd, "deny\n", 5);
+		CLOSE(fd);
+		if (ret != 5)
+			return ret<0 ? ret : -EIO;
 	}
 
 	snprintf(file_id, sizeof(file_id), "/proc/%ld/gid_map",
 		 (long) pid);
 
-	return do_userns_map_id(pid, file_id, map_gid);
+	return do_userns_map_id(file_id, map_gid);
 }
 
-static int do_cap_get_flag(cap_t caps, cap_value_t cap)
+static wur int do_cap_get_flag(cap_t caps, cap_value_t cap)
 {
 	int ret;
 	cap_flag_value_t flag_set;
@@ -1561,14 +1781,14 @@ static int do_cap_get_flag(cap_t caps, cap_value_t cap)
  *
  *  Terminate args with a negative value.
  */
-int test_is_capable(int cap, ...)
+wur int test_is_capable(int cap, ...)
 {
 	int ret;
 	va_list ap;
 	cap_t caps;
 
 	caps = cap_get_proc();
-	if (!cap) {
+	if (!caps) {
 		ret = -errno;
 		kdbus_printf("error cap_get_proc(): %d (%m)\n", ret);
 		return ret;
@@ -1591,22 +1811,22 @@ out:
 	return ret;
 }
 
-int config_user_ns_is_enabled(void)
+wur int config_user_ns_is_enabled(void)
 {
 	return (access("/proc/self/uid_map", F_OK) == 0);
 }
 
-int config_auditsyscall_is_enabled(void)
+wur int config_auditsyscall_is_enabled(void)
 {
 	return (access("/proc/self/loginuid", F_OK) == 0);
 }
 
-int config_cgroups_is_enabled(void)
+wur int config_cgroups_is_enabled(void)
 {
 	return (access("/proc/self/cgroup", F_OK) == 0);
 }
 
-int config_security_is_enabled(void)
+wur int config_security_is_enabled(void)
 {
 	int fd;
 	int ret;
@@ -1630,7 +1850,7 @@ int config_security_is_enabled(void)
 	else
 		ret = 1;
 
-	close(fd);
+	CLOSE(fd);
 
 	return ret;
 }
diff --git a/tools/testing/selftests/kdbus/kdbus-util.h b/tools/testing/selftests/kdbus/kdbus-util.h
index 652d957eac95..654adc6f607e 100644
--- a/tools/testing/selftests/kdbus/kdbus-util.h
+++ b/tools/testing/selftests/kdbus/kdbus-util.h
@@ -7,6 +7,7 @@
  * Free Software Foundation; either version 2.1 of the License, or (at
  * your option) any later version.
  */
+
 #pragma once
 
 #define BIT(X) (1 << (X))
@@ -14,11 +15,52 @@
 #include <time.h>
 #include <stdbool.h>
 #include <linux/kdbus.h>
+#include <sys/wait.h>
+
+/* backwards-incompatible tizen customizations */
+#define TIZEN
+#ifdef TIZEN
+	#define ONTIZEN(TIZEN,NONTIZEN) TIZEN
+#else
+	#define ONTIZEN(TIZEN,NONTIZEN) NONTIZEN
+#endif
+
+/* c99 compat */
+#define typeof __typeof__
+
+#define wur __attribute__((warn_unused_result))
+
+#define print(...) fprintf(stderr, ##__VA_ARGS__)
+
+#define UNUSED(VAL) do { __auto_type _UNUSED_val_ = (VAL); (void)_UNUSED_val_; } while (0)
+
+#define TABSIZE(T) (sizeof(T)/sizeof(T[0]))
+
+static inline wur void *alloc(size_t size) {
+	void *p;
+	int ret = posix_memalign(&p, 8, size);
+	return ret ? NULL : p;
+}
+
+#define MAX(A,B) ({\
+	typeof(A) __MAX__A__ = (A);\
+	typeof(B) __MAX__B__ = (B);\
+	__MAX__A__<__MAX__B__ ? __MAX__B__ : __MAX__A__;\
+})
+#define MIN(A,B) ({\
+	typeof(A) __MIN__A__ = (A);\
+	typeof(B) __MIN__B__ = (B);\
+	__MIN__A__>__MIN__B__ ? __MIN__B__ : __MIN__A__;\
+})
+
+#define KDBUS_TIMEOUT_INFINITE 0x3fffffffffffffffULL
 
 #define _STRINGIFY(x) #x
 #define STRINGIFY(x) _STRINGIFY(x)
 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
 
+#define fail(FMT,...) do { print("[" __FILE__ ":" STRINGIFY(__LINE__) "] fail " FMT "\n", ##__VA_ARGS__); exit(2); } while (0)
+
 #define KDBUS_PTR(addr) ((void *)(uintptr_t)(addr))
 
 #define KDBUS_ALIGN8(l) (((l) + 7) & ~7)
@@ -26,28 +68,26 @@
 #define KDBUS_ITEM_SIZE(s) KDBUS_ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
 
 #define KDBUS_ITEM_NEXT(item) \
-	(typeof(item))(((uint8_t *)item) + KDBUS_ALIGN8((item)->size))
+	(typeof(item))((uint8_t *)(item) + KDBUS_ALIGN8((item)->size))
 #define KDBUS_ITEM_FOREACH(item, head, first)				\
-	for (item = (head)->first;					\
+	for ((item) = (head)->first;					\
 	     ((uint8_t *)(item) < (uint8_t *)(head) + (head)->size) &&	\
-	       ((uint8_t *)(item) >= (uint8_t *)(head));	\
-	     item = KDBUS_ITEM_NEXT(item))
+	       ((uint8_t *)(item) >= (uint8_t *)(head));		\
+	     (item) = KDBUS_ITEM_NEXT(item))
 #define KDBUS_FOREACH(iter, first, _size)				\
-	for (iter = (first);						\
+	for ((iter) = (first);						\
 	     ((uint8_t *)(iter) < (uint8_t *)(first) + (_size)) &&	\
 	       ((uint8_t *)(iter) >= (uint8_t *)(first));		\
-	     iter = (void*)(((uint8_t *)iter) + KDBUS_ALIGN8((iter)->size)))
-
+	     (iter) = (void *)((uint8_t *)(iter) + KDBUS_ALIGN8((iter)->size)))
 
-#define _KDBUS_ATTACH_BITS_SET_NR  (__builtin_popcountll(_KDBUS_ATTACH_ALL))
+#define _KDBUS_ATTACH_BITS_SET_NR (__builtin_popcountll(_KDBUS_ATTACH_ALL))
 
 /* Sum of KDBUS_ITEM_* that reflects _KDBUS_ATTACH_ALL */
-#define KDBUS_ATTACH_ITEMS_TYPE_SUM \
-	((((_KDBUS_ATTACH_BITS_SET_NR - 1) * \
-	((_KDBUS_ATTACH_BITS_SET_NR - 1) + 1)) / 2 ) + \
+#define KDBUS_ATTACH_ITEMS_TYPE_SUM					\
+	((((_KDBUS_ATTACH_BITS_SET_NR - 1) *				\
+	((_KDBUS_ATTACH_BITS_SET_NR - 1) + 1)) / 2) +			\
 	(_KDBUS_ITEM_ATTACH_BASE * _KDBUS_ATTACH_BITS_SET_NR))
 
-
 #define POOL_SIZE (16 * 1024LU * 1024LU)
 
 #define UNPRIV_UID 65534
@@ -60,41 +100,43 @@ extern int kdbus_util_verbose;
 
 #define kdbus_printf(X...) \
 	if (kdbus_util_verbose) \
-		printf(X)
+		print(X)
 
-#define RUN_UNPRIVILEGED(child_uid, child_gid, _child_, _parent_) ({	\
-		pid_t pid, rpid;					\
-		int ret;						\
-									\
-		pid = fork();						\
-		if (pid == 0) {						\
-			ret = drop_privileges(child_uid, child_gid);	\
-			ASSERT_EXIT_VAL(ret == 0, ret);			\
-									\
-			_child_;					\
-			_exit(0);					\
-		} else if (pid > 0) {					\
-			_parent_;					\
-			rpid = waitpid(pid, &ret, 0);			\
-			ASSERT_RETURN(rpid == pid);			\
-			ASSERT_RETURN(WIFEXITED(ret));			\
-			ASSERT_RETURN(WEXITSTATUS(ret) == 0);		\
-			ret = TEST_OK;					\
-		} else {						\
-			ret = pid;					\
-		}							\
-									\
-		ret;							\
-	})
+#define RUN_FORKED(_child_, _parent_) ASSERT_ZERO(({\
+		pid_t pid, rpid;\
+		int ret;\
+		\
+		pid = fork();\
+		if (pid == 0) {\
+			_child_;\
+			exit(0);\
+		} else if (pid > 0) {\
+			_parent_;\
+			rpid = waitpid(pid, &ret, 0);\
+			ASSERT_RETURN(rpid,==,pid);\
+			ASSERT_NONZERO(WIFEXITED(ret));\
+			ASSERT_ZERO(WEXITSTATUS(ret));\
+			ret = TEST_OK;\
+		} else {\
+			ret = pid;\
+		}\
+		\
+		ret;\
+	}))
+
+#define RUN_UNPRIVILEGED(child_uid, child_gid, _child_, _parent_) RUN_FORKED(({\
+		ret = drop_privileges(child_uid, child_gid);\
+		ASSERT_EXIT_VAL(ret,==,0, ret);\
+		_child_;\
+	}), _parent_)
 
 #define RUN_UNPRIVILEGED_CONN(_var_, _bus_, _code_)			\
 	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({			\
 		struct kdbus_conn *_var_;				\
-		_var_ = kdbus_hello(_bus_, 0, NULL, 0);			\
-		ASSERT_EXIT(_var_);					\
+		ASSERT_EXIT_NONZERO(_var_ = kdbus_hello(_bus_, 0, NULL, 0));			\
 		_code_;							\
 		kdbus_conn_free(_var_);					\
-	}), ({ 0; }))
+	}), ({}))
 
 #define RUN_CLONE_CHILD(clone_ret, flags, _setup_, _child_body_,	\
 			_parent_setup_, _parent_body_) ({		\
@@ -104,38 +146,45 @@ extern int kdbus_util_verbose;
 									\
 	_setup_;							\
 	efd = eventfd(0, EFD_CLOEXEC);					\
-	ASSERT_RETURN(efd >= 0);					\
-	*clone_ret = 0;							\
+	ASSERT_RETURN(efd,>=,0);					\
+	*(clone_ret) = 0;						\
 	pid = syscall(__NR_clone, flags, NULL);				\
 	if (pid == 0) {							\
 		eventfd_t event_status = 0;				\
-		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);			\
-		ASSERT_EXIT(ret == 0);					\
+		ASSERT_EXIT_ZERO(prctl(PR_SET_PDEATHSIG, SIGKILL));			\
 		ret = eventfd_read(efd, &event_status);			\
 		if (ret < 0 || event_status != 1) {			\
 			kdbus_printf("error eventfd_read()\n");		\
-			_exit(EXIT_FAILURE);				\
+			exit(EXIT_FAILURE);				\
 		}							\
 		_child_body_;						\
-		_exit(0);						\
+		exit(0);						\
 	} else if (pid > 0) {						\
 		_parent_setup_;						\
-		ret = eventfd_write(efd, 1);				\
-		ASSERT_RETURN(ret >= 0);				\
+		ASSERT_RETURN(eventfd_write(efd, 1),>=,0);				\
 		_parent_body_;						\
 		rpid = waitpid(pid, &ret, 0);				\
-		ASSERT_RETURN(rpid == pid);				\
-		ASSERT_RETURN(WIFEXITED(ret));				\
-		ASSERT_RETURN(WEXITSTATUS(ret) == 0);			\
+		ASSERT_RETURN(rpid,==,pid);				\
+		ASSERT_NONZERO(WIFEXITED(ret));				\
+		ASSERT_ZERO(WEXITSTATUS(ret));			\
 		ret = TEST_OK;						\
 	} else {							\
 		ret = -errno;						\
-		*clone_ret = -errno;					\
+		*(clone_ret) = -errno;					\
 	}								\
-	close(efd);							\
+	CLOSE(efd);							\
 	ret;								\
 })
 
+#define ASSERT_NO_PENDING(CONN) do {\
+	struct kdbus_cmd_recv _ASSERT_NO_PENDING_recv_ = { .size = sizeof(_ASSERT_NO_PENDING_recv_) };\
+	int _ASSERT_NO_PENDING_fd_ = (CONN)->fd;\
+	int _ASSERT_NO_PENDING_ret_ = kdbus_cmd_recv(_ASSERT_NO_PENDING_fd_, &_ASSERT_NO_PENDING_recv_);\
+	ASSERT_RETURN(-EAGAIN,==,_ASSERT_NO_PENDING_ret_);\
+} while (0)
+
+#define CLOSE(...) do { __auto_type _CLOSE_fd_ = (__VA_ARGS__); if (close(_CLOSE_fd_)) fail("close(%d) err(%d)", _CLOSE_fd_, errno); } while (0)
+
 /* Enums for parent if it should drop privs or not */
 enum kdbus_drop_parent {
 	DO_NOT_DROP,
@@ -146,77 +195,76 @@ enum kdbus_drop_parent {
 struct kdbus_conn {
 	int fd;
 	uint64_t id;
+	unsigned attach_flags_recv;
 	unsigned char *buf;
 };
 
-int kdbus_sysfs_get_parameter_mask(const char *path, uint64_t *mask);
-int kdbus_sysfs_set_parameter_mask(const char *path, uint64_t mask);
+wur int kdbus_sysfs_get_parameter_mask(const char *path, uint64_t *mask);
+wur int kdbus_sysfs_set_parameter_mask(const char *path, uint64_t mask);
 
-int sys_memfd_create(const char *name, __u64 size);
-int sys_memfd_seal_set(int fd);
-off_t sys_memfd_get_size(int fd, off_t *size);
+wur int sys_memfd_create(const char *name, __u64 size);
+wur int sys_memfd_seal_set(int fd);
+wur off_t sys_memfd_get_size(int fd, off_t *size);
 
-int kdbus_list(struct kdbus_conn *conn, uint64_t flags);
-int kdbus_name_release(struct kdbus_conn *conn, const char *name);
-int kdbus_name_acquire(struct kdbus_conn *conn, const char *name,
+wur int kdbus_list(struct kdbus_conn *conn, uint64_t flags);
+wur int kdbus_name_release(struct kdbus_conn *conn, const char *name);
+wur int kdbus_name_acquire(struct kdbus_conn *conn, const char *name,
 		       uint64_t *flags);
 void kdbus_msg_free(struct kdbus_msg *msg);
-int kdbus_msg_recv(struct kdbus_conn *conn,
+wur int kdbus_msg_recv(struct kdbus_conn *conn,
 		   struct kdbus_msg **msg, uint64_t *offset);
-int kdbus_msg_recv_poll(struct kdbus_conn *conn, int timeout_ms,
+wur int kdbus_msg_recv_poll(struct kdbus_conn *conn, int timeout_ms,
 			struct kdbus_msg **msg_out, uint64_t *offset);
-int kdbus_free(const struct kdbus_conn *conn, uint64_t offset);
-int kdbus_msg_dump(const struct kdbus_conn *conn,
-		   const struct kdbus_msg *msg);
-int kdbus_create_bus(int control_fd, const char *name,
-		     uint64_t req_meta, uint64_t owner_meta,
-		     char **path);
-int kdbus_msg_send(const struct kdbus_conn *conn, const char *name,
+wur int kdbus_free(const struct kdbus_conn *conn, uint64_t offset);
+wur int kdbus_free_msg(struct kdbus_conn const *conn, struct kdbus_msg *msg);
+wur int kdbus_msg_dump(const struct kdbus_msg *msg);
+wur int kdbus_create_bus(int control_fd, const char *name,
+		     uint64_t owner_meta, char **path);
+wur int kdbus_msg_send(const struct kdbus_conn *conn, const char *name,
 		   uint64_t cookie, uint64_t flags, uint64_t timeout,
-		   int64_t priority, uint64_t dst_id, int fds_count, int fds[]);
-int kdbus_msg_send_sync(const struct kdbus_conn *conn, const char *name,
+		   int64_t priority, uint64_t dst_id);
+wur int kdbus_msg_send_sync(const struct kdbus_conn *conn, const char *name,
 			uint64_t cookie, uint64_t flags, uint64_t timeout,
 			int64_t priority, uint64_t dst_id, int cancel_fd);
-int kdbus_msg_send_reply(const struct kdbus_conn *conn,
+wur int kdbus_msg_send_reply(const struct kdbus_conn *conn,
 			 uint64_t reply_cookie,
 			 uint64_t dst_id);
-struct kdbus_conn *kdbus_hello(const char *path, uint64_t hello_flags,
+wur struct kdbus_conn *kdbus_hello(const char *path, uint64_t hello_flags,
 			       const struct kdbus_item *item,
 			       size_t item_size);
-struct kdbus_conn *kdbus_hello_registrar(const char *path, const char *name,
+wur int timeout_msg_recv(struct kdbus_conn *conn, uint64_t type, uint64_t *cookie_reply, uint64_t *seqnum, uint64_t *monotonic_ns, uint64_t *realtime_ns);
+wur struct kdbus_conn *kdbus_hello_registrar(const char *path, const char *name,
 					 const struct kdbus_policy_access *access,
 					 size_t num_access, uint64_t flags);
-struct kdbus_conn *kdbus_hello_activator(const char *path, const char *name,
+wur struct kdbus_conn *kdbus_hello_activator(const char *path, const char *name,
 					 const struct kdbus_policy_access *access,
 					 size_t num_access);
-bool kdbus_item_in_message(struct kdbus_msg *msg, uint64_t type);
-int kdbus_bus_creator_info(struct kdbus_conn *conn,
+wur bool kdbus_item_in_message(struct kdbus_msg *msg, uint64_t type);
+wur int kdbus_bus_creator_info(struct kdbus_conn *conn,
 			   uint64_t flags,
 			   uint64_t *offset);
-int kdbus_conn_info(struct kdbus_conn *conn, uint64_t id,
+wur int kdbus_conn_info(struct kdbus_conn *conn, uint64_t id,
 		    const char *name, uint64_t flags, uint64_t *offset);
 void kdbus_conn_free(struct kdbus_conn *conn);
-int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
+wur int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
 				   uint64_t attach_flags_send,
 				   uint64_t attach_flags_recv);
-int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
+wur int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
 			     const struct kdbus_policy_access *access,
 			     size_t num_access);
 
-int kdbus_add_match_id(struct kdbus_conn *conn, uint64_t cookie,
+wur int kdbus_add_match_id(struct kdbus_conn *conn, uint64_t cookie,
 		       uint64_t type, uint64_t id);
-int kdbus_add_match_empty(struct kdbus_conn *conn);
-
-int all_uids_gids_are_mapped();
-int drop_privileges(uid_t uid, gid_t gid);
-uint64_t now(clockid_t clock);
-char *unique_name(const char *prefix);
-
-int userns_map_uid_gid(pid_t pid,
-		       const char *map_uid,
-		       const char *map_gid);
-int test_is_capable(int cap, ...);
-int config_user_ns_is_enabled(void);
-int config_auditsyscall_is_enabled(void);
-int config_cgroups_is_enabled(void);
-int config_security_is_enabled(void);
+wur int kdbus_add_match_empty(struct kdbus_conn *conn);
+
+wur int all_uids_gids_are_mapped(void);
+wur int drop_privileges(uid_t uid, gid_t gid);
+wur uint64_t now(clockid_t clock);
+wur char *unique_name(const char *prefix);
+
+wur int userns_map_uid_gid(pid_t pid, const char *map_uid, const char *map_gid);
+wur int test_is_capable(int cap, ...);
+wur int config_user_ns_is_enabled(void);
+wur int config_auditsyscall_is_enabled(void);
+wur int config_cgroups_is_enabled(void);
+wur int config_security_is_enabled(void);
\ No newline at end of file
diff --git a/tools/testing/selftests/kdbus/test-activator.c b/tools/testing/selftests/kdbus/test-activator.c
index c70fafe83759..f2a401c4ac24 100644
--- a/tools/testing/selftests/kdbus/test-activator.c
+++ b/tools/testing/selftests/kdbus/test-activator.c
@@ -18,7 +18,7 @@
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
 
-static int kdbus_starter_poll(struct kdbus_conn *conn)
+static wur int kdbus_starter_poll(struct kdbus_conn *conn)
 {
 	int ret;
 	struct pollfd fd;
@@ -42,12 +42,11 @@ static int kdbus_starter_poll(struct kdbus_conn *conn)
 }
 
 /* Ensure that kdbus activator logic is safe */
-static int kdbus_priv_activator(struct kdbus_test_env *env)
+static wur int kdbus_priv_activator(struct kdbus_test_env *env)
 {
-	int ret;
 	struct kdbus_msg *msg = NULL;
 	uint64_t cookie = 0xdeadbeef;
-	uint64_t flags = KDBUS_NAME_REPLACE_EXISTING;
+	uint64_t flags;
 	struct kdbus_conn *activator;
 	struct kdbus_conn *service;
 	struct kdbus_conn *client;
@@ -69,39 +68,37 @@ static int kdbus_priv_activator(struct kdbus_test_env *env)
 
 	activator = kdbus_hello_activator(env->buspath, "foo.priv.activator",
 					  access, 2);
-	ASSERT_RETURN(activator);
+	ASSERT_NONZERO(activator);
 
 	service = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(service);
+	ASSERT_NONZERO(service);
 
 	client = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(client);
+	ASSERT_NONZERO(client);
 
 	/*
 	 * Make sure that other users can't TALK to the activator
 	 */
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
 		/* Try to talk using the ID */
 		ret = kdbus_msg_send(unpriv, NULL, 0xdeadbeef, 0, 0,
-				     0, activator->id, 0, NULL);
-		ASSERT_EXIT(ret == -ENXIO);
+				     0, activator->id);
+		ASSERT_EXIT(ret,==,-ENXIO);
 
 		/* Try to talk to the name */
 		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
 				     0xdeadbeef, 0, 0, 0,
-				     KDBUS_DST_ID_NAME, 0, NULL);
-		ASSERT_EXIT(ret == -EPERM);
+				     KDBUS_DST_ID_NAME);
+		ASSERT_EXIT(ret,==,ONTIZEN(0,-EPERM));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure that we did not receive anything, so the
 	 * service will not be started automatically
 	 */
 
-	ret = kdbus_starter_poll(activator);
-	ASSERT_RETURN(ret == -ETIMEDOUT);
+	ASSERT_RETURN(ONTIZEN(0,-ETIMEDOUT),==,kdbus_starter_poll(activator));
 
 	/*
 	 * Now try to emulate the starter/service logic and
@@ -109,56 +106,53 @@ static int kdbus_priv_activator(struct kdbus_test_env *env)
 	 */
 
 	cookie++;
-	ret = kdbus_msg_send(service, "foo.priv.activator", cookie,
-			     0, 0, 0, KDBUS_DST_ID_NAME, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(service, "foo.priv.activator", cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
 
-	ret = kdbus_starter_poll(activator);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_starter_poll(activator));
 
 	/* Policies are still checked, access denied */
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "foo.priv.activator",
-					 &flags);
-		ASSERT_RETURN(ret == -EPERM);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		flags = KDBUS_NAME_REPLACE_EXISTING;
+		ASSERT_RETURN(ONTIZEN(0,-EPERM),==,kdbus_name_acquire(unpriv, "foo.priv.activator", &flags));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_name_acquire(service, "foo.priv.activator",
-				 &flags);
-	ASSERT_RETURN(ret == 0);
+	flags = KDBUS_NAME_REPLACE_EXISTING;
+	ASSERT_ZERO(kdbus_name_acquire(service, "foo.priv.activator", &flags));
 
-	/* We read our previous starter message */
+#ifdef TIZEN
+	ASSERT_ZERO(kdbus_msg_recv_poll(service, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie-1);
+	kdbus_msg_free(msg);
+#endif
 
-	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(service, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
+	kdbus_msg_free(msg);
 
 	/* Try to talk, we still fail */
 
 	cookie++;
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
 		/* Try to talk to the name */
-		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
-				     cookie, 0, 0, 0,
-				     KDBUS_DST_ID_NAME, 0, NULL);
-		ASSERT_EXIT(ret == -EPERM);
+		ASSERT_EXIT(ONTIZEN(0,-EPERM),==,kdbus_msg_send(unpriv, "foo.priv.activator", cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
 	}));
-	ASSERT_RETURN(ret >= 0);
+#ifdef TIZEN
+	ASSERT_ZERO(kdbus_msg_recv_poll(service, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
+	kdbus_msg_free(msg);
+#endif
 
 	/* Still nothing to read */
 
-	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-	ASSERT_RETURN(ret == -ETIMEDOUT);
+	ASSERT_RETURN(-ETIMEDOUT,==,kdbus_msg_recv_poll(service, 100, NULL, NULL));
 
 	/* We receive every thing now */
 
 	cookie++;
-	ret = kdbus_msg_send(client, "foo.priv.activator", cookie,
-			     0, 0, 0, KDBUS_DST_ID_NAME, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_recv_poll(service, 100, &msg, NULL);
-	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_send(client, "foo.priv.activator", cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
+	ASSERT_ZERO(kdbus_msg_recv_poll(service, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
 
@@ -166,26 +160,22 @@ static int kdbus_priv_activator(struct kdbus_test_env *env)
 	kdbus_conn_free(activator);
 
 	cookie++;
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
 		/* Try to talk to the name */
-		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
-				     cookie, 0, 0, 0,
-				     KDBUS_DST_ID_NAME,
-				     0, NULL);
-		ASSERT_EXIT(ret == -EPERM);
+		ASSERT_EXIT(ONTIZEN(0,-EPERM),==,kdbus_msg_send(unpriv, "foo.priv.activator", cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-	ASSERT_RETURN(ret == -ETIMEDOUT);
+	ASSERT_RETURN(ONTIZEN(0,-ETIMEDOUT),==,kdbus_msg_recv_poll(service, 100, &msg, NULL));
+#ifdef TIZEN
+	ASSERT_RETURN(msg->cookie,==,cookie);
+	kdbus_msg_free(msg);
+#endif
 
 	/* Same user is able to TALK */
 	cookie++;
-	ret = kdbus_msg_send(client, "foo.priv.activator", cookie,
-			     0, 0, 0, KDBUS_DST_ID_NAME, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_recv_poll(service, 100, &msg, NULL);
-	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_send(client, "foo.priv.activator", cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
+	ASSERT_ZERO(kdbus_msg_recv_poll(service, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
 
@@ -199,30 +189,22 @@ static int kdbus_priv_activator(struct kdbus_test_env *env)
 
 	holder = kdbus_hello_registrar(env->buspath, "foo.priv.activator",
 				       access, 1, KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(holder);
+	ASSERT_NONZERO(holder);
 
 	/* Now we are able to TALK to the name */
 
 	cookie++;
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
 		/* Try to talk to the name */
-		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
-				     cookie, 0, 0, 0,
-				     KDBUS_DST_ID_NAME,
-				     0, NULL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, "foo.priv.activator", cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(service, 100, NULL, NULL));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "foo.priv.activator",
-					 &flags);
-		ASSERT_RETURN(ret == -EPERM);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		flags = KDBUS_NAME_REPLACE_EXISTING;
+		ASSERT_EXIT(ONTIZEN(-EEXIST,-EPERM),==,kdbus_name_acquire(unpriv, "foo.priv.activator", &flags));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	kdbus_conn_free(service);
 	kdbus_conn_free(client);
@@ -231,7 +213,7 @@ static int kdbus_priv_activator(struct kdbus_test_env *env)
 	return 0;
 }
 
-int kdbus_test_activator(struct kdbus_test_env *env)
+wur int kdbus_test_activator(struct kdbus_test_env *env)
 {
 	int ret;
 	struct kdbus_conn *activator;
@@ -248,20 +230,13 @@ int kdbus_test_activator(struct kdbus_test_env *env)
 
 	activator = kdbus_hello_activator(env->buspath, "foo.test.activator",
 					  access, 2);
-	ASSERT_RETURN(activator);
+	ASSERT_NONZERO(activator);
 
-	ret = kdbus_add_match_empty(env->conn);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(env->conn));
 
-	ret = kdbus_list(env->conn, KDBUS_LIST_NAMES |
-				    KDBUS_LIST_UNIQUE |
-				    KDBUS_LIST_ACTIVATORS |
-				    KDBUS_LIST_QUEUED);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_list(env->conn, KDBUS_LIST_NAMES | KDBUS_LIST_UNIQUE | KDBUS_LIST_ACTIVATORS | KDBUS_LIST_QUEUED));
 
-	ret = kdbus_msg_send(env->conn, "foo.test.activator", 0xdeafbeef,
-			     0, 0, 0, KDBUS_DST_ID_NAME, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, "foo.test.activator", 0xdeafbeef, 0, 0, 0, KDBUS_DST_ID_NAME));
 
 	fds[0].fd = activator->fd;
 	fds[1].fd = env->conn->fd;
@@ -277,25 +252,22 @@ int kdbus_test_activator(struct kdbus_test_env *env)
 		}
 
 		ret = poll(fds, nfds, 3000);
-		ASSERT_RETURN(ret >= 0);
+		ASSERT_RETURN(ret,>=,0);
 
-		ret = kdbus_list(env->conn, KDBUS_LIST_NAMES);
-		ASSERT_RETURN(ret == 0);
+		ASSERT_ZERO(kdbus_list(env->conn, KDBUS_LIST_NAMES));
 
 		if ((fds[0].revents & POLLIN) && !activator_done) {
 			uint64_t flags = KDBUS_NAME_REPLACE_EXISTING;
 
 			kdbus_printf("Starter was called back!\n");
 
-			ret = kdbus_name_acquire(env->conn,
-						 "foo.test.activator", &flags);
-			ASSERT_RETURN(ret == 0);
+			ASSERT_ZERO(kdbus_name_acquire(env->conn, "foo.test.activator", &flags));
 
 			activator_done = true;
 		}
 
 		if (fds[1].revents & POLLIN) {
-			kdbus_msg_recv(env->conn, NULL, NULL);
+			ASSERT_ZERO(kdbus_msg_recv(env->conn, NULL, NULL));
 			break;
 		}
 	}
@@ -306,13 +278,12 @@ int kdbus_test_activator(struct kdbus_test_env *env)
 
 	/* Check now capabilities, so we run the previous tests */
 	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>=,0);
 
 	if (!ret)
 		return TEST_SKIP;
 
-	ret = kdbus_priv_activator(env);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_priv_activator(env));
 
 	kdbus_conn_free(activator);
 
diff --git a/tools/testing/selftests/kdbus/test-attach-flags.c b/tools/testing/selftests/kdbus/test-attach-flags.c
deleted file mode 100644
index deee7c332f25..000000000000
--- a/tools/testing/selftests/kdbus/test-attach-flags.c
+++ /dev/null
@@ -1,750 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <errno.h>
-#include <assert.h>
-#include <sys/capability.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <linux/unistd.h>
-
-#include "kdbus-api.h"
-#include "kdbus-test.h"
-#include "kdbus-util.h"
-#include "kdbus-enum.h"
-
-/*
- * Should be the sum of the currently supported and compiled-in
- * KDBUS_ITEMS_* that reflect KDBUS_ATTACH_* flags.
- */
-static unsigned int KDBUS_TEST_ITEMS_SUM = KDBUS_ATTACH_ITEMS_TYPE_SUM;
-
-static struct kdbus_conn *__kdbus_hello(const char *path, uint64_t flags,
-					uint64_t attach_flags_send,
-					uint64_t attach_flags_recv)
-{
-	struct kdbus_cmd_free cmd_free = {};
-	int ret, fd;
-	struct kdbus_conn *conn;
-	struct {
-		struct kdbus_cmd_hello hello;
-
-		struct {
-			uint64_t size;
-			uint64_t type;
-			char str[16];
-		} conn_name;
-
-		uint8_t extra_items[0];
-	} h;
-
-	memset(&h, 0, sizeof(h));
-
-	kdbus_printf("-- opening bus connection %s\n", path);
-	fd = open(path, O_RDWR|O_CLOEXEC);
-	if (fd < 0) {
-		kdbus_printf("--- error %d (%m)\n", fd);
-		return NULL;
-	}
-
-	h.hello.flags = flags | KDBUS_HELLO_ACCEPT_FD;
-	h.hello.attach_flags_send = attach_flags_send;
-	h.hello.attach_flags_recv = attach_flags_recv;
-	h.conn_name.type = KDBUS_ITEM_CONN_DESCRIPTION;
-	strcpy(h.conn_name.str, "this-is-my-name");
-	h.conn_name.size = KDBUS_ITEM_HEADER_SIZE + strlen(h.conn_name.str) + 1;
-
-	h.hello.size = sizeof(h);
-	h.hello.pool_size = POOL_SIZE;
-
-	ret = kdbus_cmd_hello(fd, (struct kdbus_cmd_hello *) &h.hello);
-	if (ret < 0) {
-		kdbus_printf("--- error when saying hello: %d (%m)\n", ret);
-		return NULL;
-	}
-
-	kdbus_printf("-- New connection ID : %llu\n",
-		     (unsigned long long)h.hello.id);
-
-	cmd_free.size = sizeof(cmd_free);
-	cmd_free.offset = h.hello.offset;
-	ret = kdbus_cmd_free(fd, &cmd_free);
-	if (ret < 0)
-		return NULL;
-
-	conn = malloc(sizeof(*conn));
-	if (!conn) {
-		kdbus_printf("unable to malloc()!?\n");
-		return NULL;
-	}
-
-	conn->buf = mmap(NULL, POOL_SIZE, PROT_READ, MAP_SHARED, fd, 0);
-	if (conn->buf == MAP_FAILED) {
-		ret = -errno;
-		free(conn);
-		close(fd);
-		kdbus_printf("--- error mmap: %d (%m)\n", ret);
-		return NULL;
-	}
-
-	conn->fd = fd;
-	conn->id = h.hello.id;
-	return conn;
-}
-
-static int kdbus_test_peers_creation(struct kdbus_test_env *env)
-{
-	int ret;
-	int control_fd;
-	char *path;
-	char *busname;
-	char buspath[2048];
-	char control_path[2048];
-	uint64_t attach_flags_mask;
-	struct kdbus_conn *conn;
-
-	snprintf(control_path, sizeof(control_path),
-		 "%s/control", env->root);
-
-	/*
-	 * Set kdbus system-wide mask to 0, this has nothing
-	 * to do with the following tests, bus and connection
-	 * creation nor connection update, but we do it so we are
-	 * sure that everything work as expected
-	 */
-
-	attach_flags_mask = 0;
-	ret = kdbus_sysfs_set_parameter_mask(env->mask_param_path,
-					     attach_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-
-	/*
-	 * Create bus with a full set of ATTACH flags
-	 */
-
-	control_fd = open(control_path, O_RDWR);
-	ASSERT_RETURN(control_fd >= 0);
-
-	busname = unique_name("test-peers-creation-bus");
-	ASSERT_RETURN(busname);
-
-	ret = kdbus_create_bus(control_fd, busname, _KDBUS_ATTACH_ALL,
-			       0, &path);
-	ASSERT_RETURN(ret == 0);
-
-	snprintf(buspath, sizeof(buspath), "%s/%s/bus", env->root, path);
-
-	/*
-	 * Create a connection with an empty send attach flags, or
-	 * with just KDBUS_ATTACH_CREDS, this should fail
-	 */
-	conn = __kdbus_hello(buspath, 0, 0, 0);
-	ASSERT_RETURN(conn == NULL);
-	ASSERT_RETURN(errno == ECONNREFUSED);
-
-	conn = __kdbus_hello(buspath, 0, KDBUS_ATTACH_CREDS,
-			     _KDBUS_ATTACH_ALL);
-	ASSERT_RETURN(conn == NULL);
-	ASSERT_RETURN(errno == ECONNREFUSED);
-
-	conn = __kdbus_hello(buspath, 0, _KDBUS_ATTACH_ALL, 0);
-	ASSERT_RETURN(conn);
-
-	/* Try to cut back some send attach flags */
-	ret = kdbus_conn_update_attach_flags(conn,
-					     KDBUS_ATTACH_CREDS|
-					     KDBUS_ATTACH_PIDS,
-					     _KDBUS_ATTACH_ALL);
-	ASSERT_RETURN(ret == -EINVAL);
-
-	ret = kdbus_conn_update_attach_flags(conn,
-					     _KDBUS_ATTACH_ALL, 0);
-	ASSERT_RETURN(ret == 0);
-
-	kdbus_conn_free(conn);
-	free(path);
-	free(busname);
-	close(control_fd);
-
-
-	/* Test a new bus with KDBUS_ATTACH_PIDS */
-
-	control_fd = open(control_path, O_RDWR);
-	ASSERT_RETURN(control_fd >= 0);
-
-	busname = unique_name("test-peer-flags-bus");
-	ASSERT_RETURN(busname);
-
-	ret = kdbus_create_bus(control_fd, busname, KDBUS_ATTACH_PIDS,
-			       0, &path);
-	ASSERT_RETURN(ret == 0);
-
-	snprintf(buspath, sizeof(buspath), "%s/%s/bus", env->root, path);
-
-	/*
-	 * Create a connection with an empty send attach flags, or
-	 * all flags except KDBUS_ATTACH_PIDS
-	 */
-	conn = __kdbus_hello(buspath, 0, 0, 0);
-	ASSERT_RETURN(conn == NULL);
-	ASSERT_RETURN(errno == ECONNREFUSED);
-
-	conn = __kdbus_hello(buspath, 0,
-			     _KDBUS_ATTACH_ALL & ~KDBUS_ATTACH_PIDS,
-			     _KDBUS_ATTACH_ALL);
-	ASSERT_RETURN(conn == NULL);
-	ASSERT_RETURN(errno == ECONNREFUSED);
-
-	/* The following should succeed */
-	conn = __kdbus_hello(buspath, 0, KDBUS_ATTACH_PIDS, 0);
-	ASSERT_RETURN(conn);
-	kdbus_conn_free(conn);
-
-	conn = __kdbus_hello(buspath, 0, _KDBUS_ATTACH_ALL, 0);
-	ASSERT_RETURN(conn);
-
-	ret = kdbus_conn_update_attach_flags(conn,
-					     _KDBUS_ATTACH_ALL &
-					     ~KDBUS_ATTACH_PIDS,
-					     _KDBUS_ATTACH_ALL);
-	ASSERT_RETURN(ret == -EINVAL);
-
-	ret = kdbus_conn_update_attach_flags(conn, 0,
-					     _KDBUS_ATTACH_ALL);
-	ASSERT_RETURN(ret == -EINVAL);
-
-	/* Now we want only KDBUS_ATTACH_PIDS */
-	ret = kdbus_conn_update_attach_flags(conn,
-					     KDBUS_ATTACH_PIDS, 0);
-	ASSERT_RETURN(ret == 0);
-
-	kdbus_conn_free(conn);
-	free(path);
-	free(busname);
-	close(control_fd);
-
-
-	/*
-	 * Create bus with 0 as ATTACH flags, the bus does not
-	 * require any attach flags
-	 */
-
-	control_fd = open(control_path, O_RDWR);
-	ASSERT_RETURN(control_fd >= 0);
-
-	busname = unique_name("test-peer-flags-bus");
-	ASSERT_RETURN(busname);
-
-	ret = kdbus_create_bus(control_fd, busname, 0, 0, &path);
-	ASSERT_RETURN(ret == 0);
-
-	snprintf(buspath, sizeof(buspath), "%s/%s/bus", env->root, path);
-
-	/* Bus is open it does not require any send attach flags */
-	conn = __kdbus_hello(buspath, 0, 0, 0);
-	ASSERT_RETURN(conn);
-	kdbus_conn_free(conn);
-
-	conn = __kdbus_hello(buspath, 0, _KDBUS_ATTACH_ALL, 0);
-	ASSERT_RETURN(conn);
-
-	ret = kdbus_conn_update_attach_flags(conn, 0, 0);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_conn_update_attach_flags(conn, KDBUS_ATTACH_CREDS, 0);
-	ASSERT_RETURN(ret == 0);
-
-	kdbus_conn_free(conn);
-	free(path);
-	free(busname);
-	close(control_fd);
-
-	return 0;
-}
-
-static int kdbus_test_peers_info(struct kdbus_test_env *env)
-{
-	int ret;
-	int control_fd;
-	char *path;
-	char *busname;
-	unsigned int i = 0;
-	uint64_t offset = 0;
-	char buspath[2048];
-	char control_path[2048];
-	uint64_t attach_flags_mask;
-	struct kdbus_item *item;
-	struct kdbus_info *info;
-	struct kdbus_conn *conn;
-	struct kdbus_conn *reader;
-	unsigned long long attach_count = 0;
-
-	snprintf(control_path, sizeof(control_path),
-		 "%s/control", env->root);
-
-	attach_flags_mask = 0;
-	ret = kdbus_sysfs_set_parameter_mask(env->mask_param_path,
-					     attach_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-	control_fd = open(control_path, O_RDWR);
-	ASSERT_RETURN(control_fd >= 0);
-
-	busname = unique_name("test-peers-info-bus");
-	ASSERT_RETURN(busname);
-
-	ret = kdbus_create_bus(control_fd, busname, _KDBUS_ATTACH_ALL,
-			       0, &path);
-	ASSERT_RETURN(ret == 0);
-
-	snprintf(buspath, sizeof(buspath), "%s/%s/bus", env->root, path);
-
-	/* Create connections with the appropriate flags */
-	conn = __kdbus_hello(buspath, 0, _KDBUS_ATTACH_ALL, 0);
-	ASSERT_RETURN(conn);
-
-	reader = __kdbus_hello(buspath, 0, _KDBUS_ATTACH_ALL, 0);
-	ASSERT_RETURN(reader);
-
-	ret = kdbus_conn_info(reader, conn->id, NULL,
-			      _KDBUS_ATTACH_ALL, &offset);
-	ASSERT_RETURN(ret == 0);
-
-	info = (struct kdbus_info *)(reader->buf + offset);
-	ASSERT_RETURN(info->id == conn->id);
-
-	/* all attach flags are masked, no metadata */
-	KDBUS_ITEM_FOREACH(item, info, items)
-		i++;
-
-	ASSERT_RETURN(i == 0);
-
-	kdbus_free(reader, offset);
-
-	/* Set the mask to _KDBUS_ATTACH_ANY */
-	attach_flags_mask = _KDBUS_ATTACH_ANY;
-	ret = kdbus_sysfs_set_parameter_mask(env->mask_param_path,
-					     attach_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_conn_info(reader, conn->id, NULL,
-			      _KDBUS_ATTACH_ALL, &offset);
-	ASSERT_RETURN(ret == 0);
-
-	info = (struct kdbus_info *)(reader->buf + offset);
-	ASSERT_RETURN(info->id == conn->id);
-
-	attach_count = 0;
-	KDBUS_ITEM_FOREACH(item, info, items)
-		    attach_count += item->type;
-
-	/*
-	 * All flags have been returned except for:
-	 * KDBUS_ITEM_TIMESTAMP and
-	 * KDBUS_ITEM_OWNED_NAME we do not own any name.
-	 */
-	ASSERT_RETURN(attach_count == (KDBUS_TEST_ITEMS_SUM -
-				       KDBUS_ITEM_OWNED_NAME -
-				       KDBUS_ITEM_TIMESTAMP));
-
-	kdbus_free(reader, offset);
-
-	/* Request only OWNED names */
-	ret = kdbus_conn_info(reader, conn->id, NULL,
-			      KDBUS_ATTACH_NAMES, &offset);
-	ASSERT_RETURN(ret == 0);
-
-	info = (struct kdbus_info *)(reader->buf + offset);
-	ASSERT_RETURN(info->id == conn->id);
-
-	attach_count = 0;
-	KDBUS_ITEM_FOREACH(item, info, items)
-		attach_count += item->type;
-
-	/* we should not get any metadata since we do not own names */
-	ASSERT_RETURN(attach_count == 0);
-
-	kdbus_free(reader, offset);
-
-	kdbus_conn_free(conn);
-	kdbus_conn_free(reader);
-
-	return 0;
-}
-
-/**
- * @kdbus_mask_param:	kdbus module mask parameter (system-wide)
- * @requested_meta:	The bus owner metadata that we want
- * @expected_items:	The returned KDBUS_ITEMS_* sum. Used to
- *			validate the returned metadata items
- */
-static int kdbus_cmp_bus_creator_metadata(struct kdbus_test_env *env,
-					  struct kdbus_conn *conn,
-					  uint64_t kdbus_mask_param,
-					  uint64_t requested_meta,
-					  unsigned long expected_items)
-{
-	int ret;
-	uint64_t offset = 0;
-	struct kdbus_info *info;
-	struct kdbus_item *item;
-	unsigned long attach_count = 0;
-
-	ret = kdbus_sysfs_set_parameter_mask(env->mask_param_path,
-					     kdbus_mask_param);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_bus_creator_info(conn, requested_meta, &offset);
-	ASSERT_RETURN(ret == 0);
-
-	info = (struct kdbus_info *)(conn->buf + offset);
-
-	KDBUS_ITEM_FOREACH(item, info, items)
-		attach_count += item->type;
-
-	ASSERT_RETURN(attach_count == expected_items);
-
-	ret = kdbus_free(conn, offset);
-	ASSERT_RETURN(ret == 0);
-
-	return 0;
-}
-
-static int kdbus_test_bus_creator_info(struct kdbus_test_env *env)
-{
-	int ret;
-	int control_fd;
-	char *path;
-	char *busname;
-	char buspath[2048];
-	char control_path[2048];
-	uint64_t attach_flags_mask;
-	struct kdbus_conn *conn;
-	unsigned long expected_items = 0;
-
-	snprintf(control_path, sizeof(control_path),
-		 "%s/control", env->root);
-
-	control_fd = open(control_path, O_RDWR);
-	ASSERT_RETURN(control_fd >= 0);
-
-	busname = unique_name("test-peers-info-bus");
-	ASSERT_RETURN(busname);
-
-	/*
-	 * Now the bus allows us to see all its KDBUS_ATTACH_*
-	 * items
-	 */
-	ret = kdbus_create_bus(control_fd, busname, 0,
-			       _KDBUS_ATTACH_ALL, &path);
-	ASSERT_RETURN(ret == 0);
-
-	snprintf(buspath, sizeof(buspath), "%s/%s/bus", env->root, path);
-
-	conn = __kdbus_hello(buspath, 0, 0, 0);
-	ASSERT_RETURN(conn);
-
-	/*
-	 * Start with a kdbus module mask set to _KDBUS_ATTACH_ANY
-	 */
-	attach_flags_mask = _KDBUS_ATTACH_ANY;
-
-	/*
-	 * All flags will be returned except for:
-	 * KDBUS_ITEM_TIMESTAMP
-	 * KDBUS_ITEM_OWNED_NAME
-	 * KDBUS_ITEM_CONN_DESCRIPTION
-	 *
-	 * An extra flags is always returned KDBUS_ITEM_MAKE_NAME
-	 * which contains the bus name
-	 */
-	expected_items = KDBUS_TEST_ITEMS_SUM + KDBUS_ITEM_MAKE_NAME;
-	expected_items -= KDBUS_ITEM_TIMESTAMP +
-			  KDBUS_ITEM_OWNED_NAME +
-			  KDBUS_ITEM_CONN_DESCRIPTION;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/*
-	 * We should have:
-	 * KDBUS_ITEM_PIDS + KDBUS_ITEM_CREDS + KDBUS_ITEM_MAKE_NAME
-	 */
-	expected_items = KDBUS_ITEM_PIDS + KDBUS_ITEM_CREDS +
-			 KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     KDBUS_ATTACH_PIDS |
-					     KDBUS_ATTACH_CREDS,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/* KDBUS_ITEM_MAKE_NAME is always returned */
-	expected_items = KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     0, expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/*
-	 * Restrict kdbus system-wide mask to KDBUS_ATTACH_PIDS
-	 */
-
-	attach_flags_mask = KDBUS_ATTACH_PIDS;
-
-	/*
-	 * We should have:
-	 * KDBUS_ITEM_PIDS + KDBUS_ITEM_MAKE_NAME
-	 */
-	expected_items = KDBUS_ITEM_PIDS + KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-
-	/* system-wide mask to 0 */
-	attach_flags_mask = 0;
-
-	/* we should only see: KDBUS_ITEM_MAKE_NAME */
-	expected_items = KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	kdbus_conn_free(conn);
-	free(path);
-	free(busname);
-	close(control_fd);
-
-
-	/*
-	 * A new bus that hides all its owner metadata
-	 */
-
-	control_fd = open(control_path, O_RDWR);
-	ASSERT_RETURN(control_fd >= 0);
-
-	busname = unique_name("test-peers-info-bus");
-	ASSERT_RETURN(busname);
-
-	ret = kdbus_create_bus(control_fd, busname, 0, 0, &path);
-	ASSERT_RETURN(ret == 0);
-
-	snprintf(buspath, sizeof(buspath), "%s/%s/bus", env->root, path);
-
-	conn = __kdbus_hello(buspath, 0, 0, 0);
-	ASSERT_RETURN(conn);
-
-	/*
-	 * Start with a kdbus module mask set to _KDBUS_ATTACH_ANY
-	 */
-	attach_flags_mask = _KDBUS_ATTACH_ANY;
-
-	/*
-	 * We only get the KDBUS_ITEM_MAKE_NAME
-	 */
-	expected_items = KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/*
-	 * We still get only kdbus_ITEM_MAKE_NAME
-	 */
-	attach_flags_mask = 0;
-	expected_items = KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	kdbus_conn_free(conn);
-	free(path);
-	free(busname);
-	close(control_fd);
-
-
-	/*
-	 * A new bus that shows only the PID and CREDS metadata
-	 * of the bus owner.
-	 */
-	control_fd = open(control_path, O_RDWR);
-	ASSERT_RETURN(control_fd >= 0);
-
-	busname = unique_name("test-peers-info-bus");
-	ASSERT_RETURN(busname);
-
-	ret = kdbus_create_bus(control_fd, busname, 0,
-			       KDBUS_ATTACH_PIDS|
-			       KDBUS_ATTACH_CREDS, &path);
-	ASSERT_RETURN(ret == 0);
-
-	snprintf(buspath, sizeof(buspath), "%s/%s/bus", env->root, path);
-
-	conn = __kdbus_hello(buspath, 0, 0, 0);
-	ASSERT_RETURN(conn);
-
-	/*
-	 * Start with a kdbus module mask set to _KDBUS_ATTACH_ANY
-	 */
-	attach_flags_mask = _KDBUS_ATTACH_ANY;
-
-	/*
-	 * We should have:
-	 * KDBUS_ITEM_PIDS + KDBUS_ITEM_CREDS + KDBUS_ITEM_MAKE_NAME
-	 */
-	expected_items = KDBUS_ITEM_PIDS + KDBUS_ITEM_CREDS +
-			 KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	expected_items = KDBUS_ITEM_CREDS + KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     KDBUS_ATTACH_CREDS,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/* KDBUS_ITEM_MAKE_NAME is always returned */
-	expected_items = KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     0, expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/*
-	 * Restrict kdbus system-wide mask to KDBUS_ATTACH_PIDS
-	 */
-
-	attach_flags_mask = KDBUS_ATTACH_PIDS;
-	/*
-	 * We should have:
-	 * KDBUS_ITEM_PIDS + KDBUS_ITEM_MAKE_NAME
-	 */
-	expected_items = KDBUS_ITEM_PIDS + KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/* No KDBUS_ATTACH_CREDS */
-	expected_items = KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     KDBUS_ATTACH_CREDS,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-	/* system-wide mask to 0 */
-	attach_flags_mask = 0;
-
-	/* we should only see: KDBUS_ITEM_MAKE_NAME */
-	expected_items = KDBUS_ITEM_MAKE_NAME;
-	ret = kdbus_cmp_bus_creator_metadata(env, conn,
-					     attach_flags_mask,
-					     _KDBUS_ATTACH_ALL,
-					     expected_items);
-	ASSERT_RETURN(ret == 0);
-
-
-	kdbus_conn_free(conn);
-	free(path);
-	free(busname);
-	close(control_fd);
-
-	return 0;
-}
-
-int kdbus_test_attach_flags(struct kdbus_test_env *env)
-{
-	int ret;
-	uint64_t flags_mask;
-	uint64_t old_kdbus_flags_mask;
-
-	/* We need CAP_DAC_OVERRIDE to overwrite the kdbus mask */
-	ret = test_is_capable(CAP_DAC_OVERRIDE, -1);
-	ASSERT_RETURN(ret >= 0);
-
-	/* no enough privileges, SKIP test */
-	if (!ret)
-		return TEST_SKIP;
-
-	/*
-	 * We need to be able to write to
-	 * "/sys/module/kdbus/parameters/attach_flags_mask"
-	 * perhaps we are unprvileged/privileged in its userns
-	 */
-	ret = access(env->mask_param_path, W_OK);
-	if (ret < 0) {
-		kdbus_printf("--- access() '%s' failed: %d (%m)\n",
-			     env->mask_param_path, -errno);
-		return TEST_SKIP;
-	}
-
-	ret = kdbus_sysfs_get_parameter_mask(env->mask_param_path,
-					     &old_kdbus_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-	/* setup the right KDBUS_TEST_ITEMS_SUM */
-	if (!config_auditsyscall_is_enabled())
-		KDBUS_TEST_ITEMS_SUM -= KDBUS_ITEM_AUDIT;
-
-	if (!config_cgroups_is_enabled())
-		KDBUS_TEST_ITEMS_SUM -= KDBUS_ITEM_CGROUP;
-
-	if (!config_security_is_enabled())
-		KDBUS_TEST_ITEMS_SUM -= KDBUS_ITEM_SECLABEL;
-
-	/*
-	 * Test the connection creation attach flags
-	 */
-	ret = kdbus_test_peers_creation(env);
-	/* Restore previous kdbus mask */
-	kdbus_sysfs_set_parameter_mask(env->mask_param_path,
-				       old_kdbus_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-	/*
-	 * Test the CONN_INFO attach flags
-	 */
-	ret = kdbus_test_peers_info(env);
-	/* Restore previous kdbus mask */
-	kdbus_sysfs_set_parameter_mask(env->mask_param_path,
-				       old_kdbus_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-	/*
-	 * Test the Bus creator info and its attach flags
-	 */
-	ret = kdbus_test_bus_creator_info(env);
-	/* Restore previous kdbus mask */
-	kdbus_sysfs_set_parameter_mask(env->mask_param_path,
-				       old_kdbus_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_sysfs_get_parameter_mask(env->mask_param_path,
-					     &flags_mask);
-	ASSERT_RETURN(ret == 0 && old_kdbus_flags_mask == flags_mask);
-
-	return TEST_OK;
-}
diff --git a/tools/testing/selftests/kdbus/test-benchmark.c b/tools/testing/selftests/kdbus/test-benchmark.c
index 8a9744b00508..e53ebb5cbcc0 100644
--- a/tools/testing/selftests/kdbus/test-benchmark.c
+++ b/tools/testing/selftests/kdbus/test-benchmark.c
@@ -92,7 +92,7 @@ static void add_stats(uint64_t prev)
 		stats.latency_high = diff;
 }
 
-static int setup_simple_kdbus_msg(struct kdbus_conn *conn,
+static wur int setup_simple_kdbus_msg(struct kdbus_conn *conn,
 				  uint64_t dst_id,
 				  struct kdbus_msg **msg_out)
 {
@@ -103,8 +103,8 @@ static int setup_simple_kdbus_msg(struct kdbus_conn *conn,
 	size = sizeof(struct kdbus_msg);
 	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
 
-	msg = malloc(size);
-	ASSERT_RETURN_VAL(msg, -ENOMEM);
+	msg = alloc(size);
+	ASSERT_RETURN_VAL(msg,!=,NULL, -ENOMEM);
 
 	memset(msg, 0, size);
 	msg->size = size;
@@ -125,7 +125,7 @@ static int setup_simple_kdbus_msg(struct kdbus_conn *conn,
 	return 0;
 }
 
-static int setup_memfd_kdbus_msg(struct kdbus_conn *conn,
+static wur int setup_memfd_kdbus_msg(struct kdbus_conn *conn,
 				 uint64_t dst_id,
 				 off_t *memfd_item_offset,
 				 struct kdbus_msg **msg_out)
@@ -138,8 +138,8 @@ static int setup_memfd_kdbus_msg(struct kdbus_conn *conn,
 	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
 	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
 
-	msg = malloc(size);
-	ASSERT_RETURN_VAL(msg, -ENOMEM);
+	msg = alloc(size);
+	ASSERT_RETURN_VAL(msg,!=,NULL, -ENOMEM);
 
 	memset(msg, 0, size);
 	msg->size = size;
@@ -165,9 +165,8 @@ static int setup_memfd_kdbus_msg(struct kdbus_conn *conn,
 	return 0;
 }
 
-static int
-send_echo_request(struct kdbus_conn *conn, uint64_t dst_id,
-		  void *kdbus_msg, off_t memfd_item_offset)
+static wur int
+send_echo_request(struct kdbus_conn *conn, void *kdbus_msg, off_t memfd_item_offset)
 {
 	struct kdbus_cmd_send cmd = {};
 	int memfd = -1;
@@ -177,13 +176,11 @@ send_echo_request(struct kdbus_conn *conn, uint64_t dst_id,
 		uint64_t now_ns = now(CLOCK_THREAD_CPUTIME_ID);
 		struct kdbus_item *item = memfd_item_offset + kdbus_msg;
 		memfd = sys_memfd_create("memfd-name", 0);
-		ASSERT_RETURN_VAL(memfd >= 0, memfd);
+		ASSERT_RETURN_VAL(memfd,>=,0, memfd);
 
-		ret = write(memfd, &now_ns, sizeof(now_ns));
-		ASSERT_RETURN_VAL(ret == sizeof(now_ns), -EAGAIN);
+		ASSERT_RETURN_VAL(write(memfd, &now_ns, sizeof(now_ns)),==,(typeof(write(memfd, &now_ns, sizeof(now_ns))))sizeof(now_ns), -EAGAIN);
 
-		ret = sys_memfd_seal_set(memfd);
-		ASSERT_RETURN_VAL(ret == 0, -errno);
+		ASSERT_RETURN_VAL(sys_memfd_seal_set(memfd),==,0, -errno);
 
 		item->memfd.fd = memfd;
 	}
@@ -192,14 +189,15 @@ send_echo_request(struct kdbus_conn *conn, uint64_t dst_id,
 	cmd.msg_address = (uintptr_t)kdbus_msg;
 
 	ret = kdbus_cmd_send(conn->fd, &cmd);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
-	close(memfd);
+	if (-1 != memfd)
+		CLOSE(memfd);
 
 	return 0;
 }
 
-static int
+static wur int
 handle_echo_reply(struct kdbus_conn *conn, uint64_t send_ns)
 {
 	int ret;
@@ -212,7 +210,7 @@ handle_echo_reply(struct kdbus_conn *conn, uint64_t send_ns)
 	if (ret == -EAGAIN)
 		return ret;
 
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	if (!use_memfd)
 		goto out;
@@ -226,13 +224,14 @@ handle_echo_reply(struct kdbus_conn *conn, uint64_t send_ns)
 
 			buf = mmap(NULL, item->memfd.size, PROT_READ,
 				   MAP_PRIVATE, item->memfd.fd, 0);
-			ASSERT_RETURN_VAL(buf != MAP_FAILED, -EINVAL);
-			ASSERT_RETURN_VAL(item->memfd.size == sizeof(uint64_t),
-					  -EINVAL);
+			if (MAP_FAILED == buf)
+				print("memfdfail_item->memfd.size(%llu)_item->memfd.fd(%d)", (unsigned long long)item->memfd.size, item->memfd.fd);
+			ASSERT_RETURN_VAL(buf,!=,MAP_FAILED, -EINVAL);
+			ASSERT_RETURN_VAL(item->memfd.size,==,sizeof(uint64_t), -EINVAL);
 
 			add_stats(*(uint64_t*)buf);
 			munmap(buf, item->memfd.size);
-			close(item->memfd.fd);
+			CLOSE(item->memfd.fd);
 			has_memfd = true;
 			break;
 		}
@@ -248,12 +247,12 @@ out:
 		add_stats(send_ns);
 
 	ret = kdbus_free(conn, recv.msg.offset);
-	ASSERT_RETURN_VAL(ret == 0, -errno);
+	ASSERT_RETURN_VAL(ret,==,0, -errno);
 
 	return 0;
 }
 
-static int benchmark(struct kdbus_test_env *env)
+static wur int benchmark(struct kdbus_test_env *env)
 {
 	static char buf[sizeof(stress_payload)];
 	struct kdbus_msg *kdbus_msg = NULL;
@@ -273,60 +272,45 @@ static int benchmark(struct kdbus_test_env *env)
 	/* setup kdbus pair */
 
 	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
+	ASSERT_NONZERO(conn_a);
 	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_a && conn_b);
+	ASSERT_NONZERO(conn_b);
 
-	ret = kdbus_add_match_empty(conn_a);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn_a));
 
-	ret = kdbus_add_match_empty(conn_b);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn_b));
 
-	ret = kdbus_name_acquire(conn_a, SERVICE_NAME, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn_a, SERVICE_NAME, NULL));
 
-	if (attach_none) {
-		ret = kdbus_conn_update_attach_flags(conn_a,
-						     _KDBUS_ATTACH_ALL,
-						     0);
-		ASSERT_RETURN(ret == 0);
-	}
+	if (attach_none)
+		ASSERT_ZERO(kdbus_conn_update_attach_flags(conn_a, _KDBUS_ATTACH_ALL, 0));
 
 	/* setup UDS pair */
 
-	ret = socketpair(AF_UNIX, SOCK_SEQPACKET | SOCK_NONBLOCK, 0, uds);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(socketpair(AF_UNIX, SOCK_SEQPACKET | SOCK_NONBLOCK, 0, uds));
 
 	/* setup a kdbus msg now */
-	if (use_memfd) {
-		ret = setup_memfd_kdbus_msg(conn_b, conn_a->id,
-					    &memfd_cached_offset,
-					    &kdbus_msg);
-		ASSERT_RETURN(ret == 0);
-	} else {
-		ret = setup_simple_kdbus_msg(conn_b, conn_a->id, &kdbus_msg);
-		ASSERT_RETURN(ret == 0);
-	}
+	if (use_memfd)
+		ASSERT_ZERO(setup_memfd_kdbus_msg(conn_b, conn_a->id, &memfd_cached_offset, &kdbus_msg));
+	else
+		ASSERT_ZERO(setup_simple_kdbus_msg(conn_b, conn_a->id, &kdbus_msg));
 
 	/* start benchmark */
 
 	kdbus_printf("-- entering poll loop ...\n");
 
+	ASSERT_NO_PENDING(conn_a);
+
 	do {
 		/* run kdbus benchmark */
 		fds[0].fd = conn_a->fd;
 		fds[1].fd = conn_b->fd;
 
-		/* cancel any pending message */
-		handle_echo_reply(conn_a, 0);
-
 		start = now(CLOCK_THREAD_CPUTIME_ID);
 		reset_stats();
 
 		send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-		ret = send_echo_request(conn_b, conn_a->id,
-					kdbus_msg, memfd_cached_offset);
-		ASSERT_RETURN(ret == 0);
+		ASSERT_ZERO(send_echo_request(conn_b, kdbus_msg, memfd_cached_offset));
 
 		while (1) {
 			unsigned int nfds = sizeof(fds) / sizeof(fds[0]);
@@ -342,14 +326,10 @@ static int benchmark(struct kdbus_test_env *env)
 				break;
 
 			if (fds[0].revents & POLLIN) {
-				ret = handle_echo_reply(conn_a, send_ns);
-				ASSERT_RETURN(ret == 0);
+				ASSERT_ZERO(handle_echo_reply(conn_a, send_ns));
 
 				send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-				ret = send_echo_request(conn_b, conn_a->id,
-							kdbus_msg,
-							memfd_cached_offset);
-				ASSERT_RETURN(ret == 0);
+				ASSERT_ZERO(send_echo_request(conn_b, kdbus_msg, memfd_cached_offset));
 			}
 
 			now_ns = now(CLOCK_THREAD_CPUTIME_ID);
@@ -358,6 +338,7 @@ static int benchmark(struct kdbus_test_env *env)
 				start = now_ns;
 
 				dump_stats(false);
+				ASSERT_ZERO(handle_echo_reply(conn_a, send_ns)); /* purge last message to prevent leaks */
 				break;
 			}
 		}
@@ -370,15 +351,14 @@ static int benchmark(struct kdbus_test_env *env)
 		fds[0].fd = uds[0];
 		fds[1].fd = uds[1];
 
-		/* cancel any pendign message */
-		read(uds[1], buf, sizeof(buf));
+		/* cancel any pending message */
+		UNUSED(read(uds[1], buf, sizeof(buf)));
 
 		start = now(CLOCK_THREAD_CPUTIME_ID);
 		reset_stats();
 
 		send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-		ret = write(uds[0], stress_payload, sizeof(stress_payload));
-		ASSERT_RETURN(ret == sizeof(stress_payload));
+		ASSERT_RETURN((typeof(write(uds[0], stress_payload, sizeof(stress_payload))))sizeof(stress_payload),==,write(uds[0], stress_payload, sizeof(stress_payload)));
 
 		while (1) {
 			unsigned int nfds = sizeof(fds) / sizeof(fds[0]);
@@ -394,14 +374,12 @@ static int benchmark(struct kdbus_test_env *env)
 				break;
 
 			if (fds[1].revents & POLLIN) {
-				ret = read(uds[1], buf, sizeof(buf));
-				ASSERT_RETURN(ret == sizeof(buf));
+				ASSERT_RETURN((typeof(read(uds[1], buf, sizeof(buf))))sizeof(buf),==,read(uds[1], buf, sizeof(buf)));
 
 				add_stats(send_ns);
 
 				send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-				ret = write(uds[0], buf, sizeof(buf));
-				ASSERT_RETURN(ret == sizeof(buf));
+				ASSERT_RETURN((typeof(write(uds[0], buf, sizeof(buf))))sizeof(buf),==,write(uds[0], buf, sizeof(buf)));
 			}
 
 			now_ns = now(CLOCK_THREAD_CPUTIME_ID);
@@ -426,7 +404,7 @@ static int benchmark(struct kdbus_test_env *env)
 	return (stats.count > 1) ? TEST_OK : TEST_ERR;
 }
 
-int kdbus_test_benchmark(struct kdbus_test_env *env)
+wur int kdbus_test_benchmark(struct kdbus_test_env *env)
 {
 	use_memfd = true;
 	attach_none = false;
@@ -434,7 +412,7 @@ int kdbus_test_benchmark(struct kdbus_test_env *env)
 	return benchmark(env);
 }
 
-int kdbus_test_benchmark_nomemfds(struct kdbus_test_env *env)
+wur int kdbus_test_benchmark_nomemfds(struct kdbus_test_env *env)
 {
 	use_memfd = false;
 	attach_none = false;
@@ -442,7 +420,7 @@ int kdbus_test_benchmark_nomemfds(struct kdbus_test_env *env)
 	return benchmark(env);
 }
 
-int kdbus_test_benchmark_uds(struct kdbus_test_env *env)
+wur int kdbus_test_benchmark_uds(struct kdbus_test_env *env)
 {
 	use_memfd = false;
 	attach_none = true;
diff --git a/tools/testing/selftests/kdbus/test-bus.c b/tools/testing/selftests/kdbus/test-bus.c
index 762fb30397d4..85fb2229fff0 100644
--- a/tools/testing/selftests/kdbus/test-bus.c
+++ b/tools/testing/selftests/kdbus/test-bus.c
@@ -16,7 +16,7 @@
 #include "kdbus-enum.h"
 #include "kdbus-test.h"
 
-static struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
+static wur struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
 					 uint64_t type)
 {
 	struct kdbus_item *item;
@@ -28,7 +28,7 @@ static struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
 	return NULL;
 }
 
-static int test_bus_creator_info(const char *bus_path)
+static wur int test_bus_creator_info(const char *bus_path)
 {
 	int ret;
 	uint64_t offset;
@@ -39,35 +39,34 @@ static int test_bus_creator_info(const char *bus_path)
 
 	/* extract the bus-name from @bus_path */
 	tmp = strdup(bus_path);
-	ASSERT_RETURN(tmp);
+	ASSERT_NONZERO(tmp);
 	busname = strrchr(tmp, '/');
-	ASSERT_RETURN(busname);
+	ASSERT_NONZERO(busname);
 	*busname = 0;
 	busname = strrchr(tmp, '/');
-	ASSERT_RETURN(busname);
+	ASSERT_NONZERO(busname);
 	++busname;
 
 	conn = kdbus_hello(bus_path, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn);
 
-	ret = kdbus_bus_creator_info(conn, _KDBUS_ATTACH_ALL, &offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_bus_creator_info(conn, _KDBUS_ATTACH_ALL, &offset));
 
 	info = (struct kdbus_info *)(conn->buf + offset);
 
 	item = kdbus_get_item(info, KDBUS_ITEM_MAKE_NAME);
-	ASSERT_RETURN(item);
-	ASSERT_RETURN(!strcmp(item->str, busname));
+	ASSERT_NONZERO(item);
+	ASSERT_ZERO(strcmp(item->str, busname));
 
 	ret = kdbus_free(conn, offset);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	free(tmp);
 	kdbus_conn_free(conn);
 	return 0;
 }
 
-int kdbus_test_bus_make(struct kdbus_test_env *env)
+wur int kdbus_test_bus_make(struct kdbus_test_env *env)
 {
 	struct {
 		struct kdbus_cmd cmd;
@@ -85,18 +84,18 @@ int kdbus_test_bus_make(struct kdbus_test_env *env)
 		char name[64];
 	} bus_make;
 	char s[PATH_MAX], *name;
-	int ret, control_fd2;
+	int control_fd2;
 	uid_t uid;
 
 	name = unique_name("");
-	ASSERT_RETURN(name);
+	ASSERT_NONZERO(name);
 
 	snprintf(s, sizeof(s), "%s/control", env->root);
 	env->control_fd = open(s, O_RDWR|O_CLOEXEC);
-	ASSERT_RETURN(env->control_fd >= 0);
+	ASSERT_RETURN(env->control_fd,>=,0);
 
 	control_fd2 = open(s, O_RDWR|O_CLOEXEC);
-	ASSERT_RETURN(control_fd2 >= 0);
+	ASSERT_RETURN(control_fd2,>=,0);
 
 	memset(&bus_make, 0, sizeof(bus_make));
 
@@ -114,41 +113,35 @@ int kdbus_test_bus_make(struct kdbus_test_env *env)
 	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
 	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
 			    sizeof(bus_make.bs) + bus_make.n_size;
-	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd));
 
 	/* non alphanumeric character */
 	snprintf(bus_make.name, sizeof(bus_make.name), "%u-blah@123", uid);
 	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
 	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
 			    sizeof(bus_make.bs) + bus_make.n_size;
-	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd));
 
 	/* '-' at the end */
 	snprintf(bus_make.name, sizeof(bus_make.name), "%u-blah-", uid);
 	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
 	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
 			    sizeof(bus_make.bs) + bus_make.n_size;
-	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd));
 
 	/* create a new bus */
 	snprintf(bus_make.name, sizeof(bus_make.name), "%u-%s-1", uid, name);
 	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
 	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
 			    sizeof(bus_make.bs) + bus_make.n_size;
-	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd));
 
-	ret = kdbus_cmd_bus_make(control_fd2, &bus_make.cmd);
-	ASSERT_RETURN(ret == -EEXIST);
+	ASSERT_RETURN(-EEXIST,==,kdbus_cmd_bus_make(control_fd2, &bus_make.cmd));
 
 	snprintf(s, sizeof(s), "%s/%u-%s-1/bus", env->root, uid, name);
-	ASSERT_RETURN(access(s, F_OK) == 0);
+	ASSERT_ZERO(access(s, F_OK));
 
-	ret = test_bus_creator_info(s);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_bus_creator_info(s));
 
 	/* can't use the same fd for bus make twice, even though a different
 	 * bus name is used
@@ -157,18 +150,16 @@ int kdbus_test_bus_make(struct kdbus_test_env *env)
 	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
 	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
 			    sizeof(bus_make.bs) + bus_make.n_size;
-	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-	ASSERT_RETURN(ret == -EBADFD);
+	ASSERT_RETURN(-EBADFD,==,kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd));
 
 	/* create a new bus, with different fd and different bus name */
 	snprintf(bus_make.name, sizeof(bus_make.name), "%u-%s-2", uid, name);
 	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
 	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
 			    sizeof(bus_make.bs) + bus_make.n_size;
-	ret = kdbus_cmd_bus_make(control_fd2, &bus_make.cmd);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_bus_make(control_fd2, &bus_make.cmd));
 
-	close(control_fd2);
+	CLOSE(control_fd2);
 	free(name);
 
 	return TEST_OK;
diff --git a/tools/testing/selftests/kdbus/test-chat.c b/tools/testing/selftests/kdbus/test-chat.c
index e19f595283cd..fe6eea79335e 100644
--- a/tools/testing/selftests/kdbus/test-chat.c
+++ b/tools/testing/selftests/kdbus/test-chat.c
@@ -15,7 +15,7 @@
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
 
-int kdbus_test_chat(struct kdbus_test_env *env)
+wur int kdbus_test_chat(struct kdbus_test_env *env)
 {
 	int ret, cookie;
 	struct kdbus_conn *conn_a, *conn_b;
@@ -24,48 +24,36 @@ int kdbus_test_chat(struct kdbus_test_env *env)
 	int count;
 
 	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
+	ASSERT_NONZERO(conn_a);
 	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_a && conn_b);
+	ASSERT_NONZERO(conn_b);
 
 	flags = KDBUS_NAME_ALLOW_REPLACEMENT;
-	ret = kdbus_name_acquire(conn_a, "foo.bar.test", &flags);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn_a, "foo.bar.test", &flags));
 
-	ret = kdbus_name_acquire(conn_a, "foo.bar.baz", NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn_a, "foo.bar.baz", NULL));
 
 	flags = KDBUS_NAME_QUEUE;
-	ret = kdbus_name_acquire(conn_b, "foo.bar.baz", &flags);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn_b, "foo.bar.baz", &flags));
 
-	ret = kdbus_name_acquire(conn_a, "foo.bar.double", NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn_a, "foo.bar.double", NULL));
 
-	ret = kdbus_name_acquire(conn_a, "foo.bar.double", NULL);
-	ASSERT_RETURN(ret == -EALREADY);
+	flags = 0;
+	ASSERT_ZERO(kdbus_name_acquire(conn_a, "foo.bar.double", &flags));
+	ASSERT_ZERO(flags & KDBUS_NAME_ACQUIRED);
 
-	ret = kdbus_name_release(conn_a, "foo.bar.double");
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_release(conn_a, "foo.bar.double"));
 
-	ret = kdbus_name_release(conn_a, "foo.bar.double");
-	ASSERT_RETURN(ret == -ESRCH);
+	ASSERT_RETURN(-ESRCH,==,kdbus_name_release(conn_a, "foo.bar.double"));
 
-	ret = kdbus_list(conn_b, KDBUS_LIST_UNIQUE |
-				 KDBUS_LIST_NAMES  |
-				 KDBUS_LIST_QUEUED |
-				 KDBUS_LIST_ACTIVATORS);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_list(conn_b, KDBUS_LIST_UNIQUE | KDBUS_LIST_NAMES  | KDBUS_LIST_QUEUED | KDBUS_LIST_ACTIVATORS));
 
-	ret = kdbus_add_match_empty(conn_a);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn_a));
 
-	ret = kdbus_add_match_empty(conn_b);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn_b));
 
 	cookie = 0;
-	ret = kdbus_msg_send(conn_b, NULL, 0xc0000000 | cookie, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn_b, NULL, 0xc0000000 | cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
 	fds[0].fd = conn_a->fd;
 	fds[1].fd = conn_b->fd;
@@ -81,34 +69,22 @@ int kdbus_test_chat(struct kdbus_test_env *env)
 		}
 
 		ret = poll(fds, nfds, 3000);
-		ASSERT_RETURN(ret >= 0);
+		ASSERT_RETURN(ret,>=,0);
 
 		if (fds[0].revents & POLLIN) {
-			if (count > 2)
-				kdbus_name_release(conn_a, "foo.bar.baz");
-
-			ret = kdbus_msg_recv(conn_a, NULL, NULL);
-			ASSERT_RETURN(ret == 0);
-			ret = kdbus_msg_send(conn_a, NULL,
-					     0xc0000000 | cookie++,
-					     0, 0, 0, conn_b->id, 0, NULL);
-			ASSERT_RETURN(ret == 0);
+			if (count == 3)
+				ASSERT_ZERO(kdbus_name_release(conn_a, "foo.bar.baz"));
+
+			ASSERT_ZERO(kdbus_msg_recv(conn_a, NULL, NULL));
+			ASSERT_ZERO(kdbus_msg_send(conn_a, NULL, 0xc0000000 | cookie++, 0, 0, 0, conn_b->id));
 		}
 
 		if (fds[1].revents & POLLIN) {
-			ret = kdbus_msg_recv(conn_b, NULL, NULL);
-			ASSERT_RETURN(ret == 0);
-			ret = kdbus_msg_send(conn_b, NULL,
-					     0xc0000000 | cookie++,
-					     0, 0, 0, conn_a->id, 0, NULL);
-			ASSERT_RETURN(ret == 0);
+			ASSERT_ZERO(kdbus_msg_recv(conn_b, NULL, NULL));
+			ASSERT_ZERO(kdbus_msg_send(conn_b, NULL, 0xc0000000 | cookie++, 0, 0, 0, conn_a->id));
 		}
 
-		ret = kdbus_list(conn_b, KDBUS_LIST_UNIQUE |
-					 KDBUS_LIST_NAMES  |
-					 KDBUS_LIST_QUEUED |
-					 KDBUS_LIST_ACTIVATORS);
-		ASSERT_RETURN(ret == 0);
+		ASSERT_ZERO(kdbus_list(conn_b, KDBUS_LIST_UNIQUE | KDBUS_LIST_NAMES  | KDBUS_LIST_QUEUED | KDBUS_LIST_ACTIVATORS));
 
 		if (count > 10)
 			break;
diff --git a/tools/testing/selftests/kdbus/test-connection.c b/tools/testing/selftests/kdbus/test-connection.c
index 7afb76fdf7da..73a309687c93 100644
--- a/tools/testing/selftests/kdbus/test-connection.c
+++ b/tools/testing/selftests/kdbus/test-connection.c
@@ -20,16 +20,16 @@
 #include "kdbus-enum.h"
 #include "kdbus-test.h"
 
-int kdbus_test_hello(struct kdbus_test_env *env)
+wur int kdbus_test_hello(struct kdbus_test_env *env)
 {
 	struct kdbus_cmd_free cmd_free = {};
 	struct kdbus_cmd_hello hello;
-	int fd, ret;
+	int fd;
 
 	memset(&hello, 0, sizeof(hello));
 
 	fd = open(env->buspath, O_RDWR|O_CLOEXEC);
-	ASSERT_RETURN(fd >= 0);
+	ASSERT_RETURN(fd,>=,0);
 
 	hello.flags = KDBUS_HELLO_ACCEPT_FD;
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
@@ -38,116 +38,89 @@ int kdbus_test_hello(struct kdbus_test_env *env)
 	hello.pool_size = POOL_SIZE;
 
 	/* an unaligned hello must result in -EFAULT */
-	ret = kdbus_cmd_hello(fd, (struct kdbus_cmd_hello *) ((char *) &hello + 1));
-	ASSERT_RETURN(ret == -EFAULT);
+	ASSERT_RETURN(-EFAULT,==,kdbus_cmd_hello(fd, (struct kdbus_cmd_hello *) ((char *) &hello + 1)));
 
 	/* a size of 0 must return EMSGSIZE */
 	hello.size = 1;
 	hello.flags = KDBUS_HELLO_ACCEPT_FD;
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_hello(fd, &hello));
 
 	hello.size = sizeof(struct kdbus_cmd_hello);
 
 	/* check faulty flags */
 	hello.flags = 1ULL << 32;
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_hello(fd, &hello));
 
 	/* check for faulty pool sizes */
 	hello.pool_size = 0;
 	hello.flags = KDBUS_HELLO_ACCEPT_FD;
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_hello(fd, &hello));
 
 	hello.pool_size = 4097;
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_hello(fd, &hello));
 
 	hello.pool_size = POOL_SIZE;
 
-	/*
-	 * The connection created by the core requires ALL meta flags
-	 * to be sent. An attempt to send less than that should result in
-	 * -ECONNREFUSED.
-	 */
-	hello.attach_flags_send = _KDBUS_ATTACH_ALL & ~KDBUS_ATTACH_TIMESTAMP;
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == -ECONNREFUSED);
-
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
 	hello.offset = (__u64)-1;
 
 	/* success test */
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_hello(fd, &hello));
 
 	/* The kernel should have returned some items */
-	ASSERT_RETURN(hello.offset != (__u64)-1);
+	ASSERT_RETURN(hello.offset,!=,(__u64)-1);
 	cmd_free.size = sizeof(cmd_free);
 	cmd_free.offset = hello.offset;
-	ret = kdbus_cmd_free(fd, &cmd_free);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_ZERO(kdbus_cmd_free(fd, &cmd_free));
 
-	close(fd);
+	CLOSE(fd);
 
 	fd = open(env->buspath, O_RDWR|O_CLOEXEC);
-	ASSERT_RETURN(fd >= 0);
+	ASSERT_RETURN(fd,>=,0);
 
 	/* no ACTIVATOR flag without a name */
 	hello.flags = KDBUS_HELLO_ACTIVATOR;
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_hello(fd, &hello));
 
-	close(fd);
+	CLOSE(fd);
 
 	return TEST_OK;
 }
 
-int kdbus_test_byebye(struct kdbus_test_env *env)
+wur int kdbus_test_byebye(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn;
 	struct kdbus_cmd_recv cmd_recv = { .size = sizeof(cmd_recv) };
 	struct kdbus_cmd cmd_byebye = { .size = sizeof(cmd_byebye) };
-	int ret;
 
 	/* create a 2nd connection */
 	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn);
 
-	ret = kdbus_add_match_empty(conn);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn));
 
-	ret = kdbus_add_match_empty(env->conn);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(env->conn));
 
 	/* send over 1st connection */
-	ret = kdbus_msg_send(env->conn, NULL, 0, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, NULL, 0, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
 	/* say byebye on the 2nd, which must fail */
-	ret = kdbus_cmd_byebye(conn->fd, &cmd_byebye);
-	ASSERT_RETURN(ret == -EBUSY);
+	ASSERT_RETURN(-EBUSY,==,kdbus_cmd_byebye(conn->fd, &cmd_byebye));
 
 	/* receive the message */
-	ret = kdbus_cmd_recv(conn->fd, &cmd_recv);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_recv(conn->fd, &cmd_recv));
 
-	ret = kdbus_free(conn, cmd_recv.msg.offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_free(conn, cmd_recv.msg.offset));
 
 	/* and try again */
-	ret = kdbus_cmd_byebye(conn->fd, &cmd_byebye);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_byebye(conn->fd, &cmd_byebye));
 
 	/* a 2nd try should result in -ECONNRESET */
-	ret = kdbus_cmd_byebye(conn->fd, &cmd_byebye);
-	ASSERT_RETURN(ret == -ECONNRESET);
+	ASSERT_RETURN(-ECONNRESET,==,kdbus_cmd_byebye(conn->fd, &cmd_byebye));
 
 	kdbus_conn_free(conn);
 
@@ -155,7 +128,7 @@ int kdbus_test_byebye(struct kdbus_test_env *env)
 }
 
 /* Get only the first item */
-static struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
+static wur struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
 					 uint64_t type)
 {
 	struct kdbus_item *item;
@@ -167,7 +140,7 @@ static struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
 	return NULL;
 }
 
-static unsigned int kdbus_count_item(struct kdbus_info *info,
+static wur unsigned int kdbus_count_item(struct kdbus_info *info,
 				     uint64_t type)
 {
 	unsigned int i = 0;
@@ -180,18 +153,14 @@ static unsigned int kdbus_count_item(struct kdbus_info *info,
 	return i;
 }
 
-static int kdbus_fuzz_conn_info(struct kdbus_test_env *env, int capable)
+static wur int kdbus_fuzz_conn_info(struct kdbus_test_env *env, int capable)
 {
-	int ret;
 	unsigned int cnt = 0;
 	uint64_t offset = 0;
-	uint64_t kdbus_flags_mask;
 	struct kdbus_info *info;
 	struct kdbus_conn *conn;
 	struct kdbus_conn *privileged;
 	const struct kdbus_item *item;
-	uint64_t valid_flags_set;
-	uint64_t invalid_flags_set;
 	uint64_t valid_flags = KDBUS_ATTACH_NAMES |
 			       KDBUS_ATTACH_CREDS |
 			       KDBUS_ATTACH_PIDS |
@@ -227,138 +196,114 @@ static int kdbus_fuzz_conn_info(struct kdbus_test_env *env, int capable)
 		.ppid	= getppid(),
 	};
 
-	ret = kdbus_sysfs_get_parameter_mask(env->mask_param_path,
-					     &kdbus_flags_mask);
-	ASSERT_RETURN(ret == 0);
-
-	valid_flags_set = valid_flags & kdbus_flags_mask;
-	invalid_flags_set = invalid_flags & kdbus_flags_mask;
-
-	ret = kdbus_conn_info(env->conn, env->conn->id, NULL,
-			      valid_flags, &offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(env->conn, env->conn->id, NULL, valid_flags, &offset));
 
 	info = (struct kdbus_info *)(env->conn->buf + offset);
-	ASSERT_RETURN(info->id == env->conn->id);
+	ASSERT_RETURN(info->id,==,env->conn->id);
 
 	/* We do not have any well-known name */
 	item = kdbus_get_item(info, KDBUS_ITEM_NAME);
-	ASSERT_RETURN(item == NULL);
+	ASSERT_ZERO(item);
 
 	item = kdbus_get_item(info, KDBUS_ITEM_CONN_DESCRIPTION);
-	if (valid_flags_set & KDBUS_ATTACH_CONN_DESCRIPTION) {
-		ASSERT_RETURN(item);
-	} else {
-		ASSERT_RETURN(item == NULL);
-	}
+	if (valid_flags & KDBUS_ATTACH_CONN_DESCRIPTION)
+		ASSERT_NONZERO(item);
+	else
+		ASSERT_ZERO(item);
 
-	kdbus_free(env->conn, offset);
+	ASSERT_ZERO(kdbus_free(env->conn, offset));
 
 	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn);
 
 	privileged = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(privileged);
+	ASSERT_NONZERO(privileged);
 
-	ret = kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset));
 
 	info = (struct kdbus_info *)(conn->buf + offset);
-	ASSERT_RETURN(info->id == conn->id);
+	ASSERT_RETURN(info->id,==,conn->id);
 
 	/* We do not have any well-known name */
 	item = kdbus_get_item(info, KDBUS_ITEM_NAME);
-	ASSERT_RETURN(item == NULL);
+	ASSERT_ZERO(item);
 
 	cnt = kdbus_count_item(info, KDBUS_ITEM_CREDS);
-	if (valid_flags_set & KDBUS_ATTACH_CREDS) {
-		ASSERT_RETURN(cnt == 1);
+	if (valid_flags & KDBUS_ATTACH_CREDS) {
+		ASSERT_RETURN(cnt,==,1U);
 
 		item = kdbus_get_item(info, KDBUS_ITEM_CREDS);
-		ASSERT_RETURN(item);
+		ASSERT_NONZERO(item);
 
 		/* Compare received items with cached creds */
-		ASSERT_RETURN(memcmp(&item->creds, &cached_creds,
-				      sizeof(struct kdbus_creds)) == 0);
-	} else {
-		ASSERT_RETURN(cnt == 0);
-	}
+		ASSERT_ZERO(memcmp(&item->creds, &cached_creds, sizeof(struct kdbus_creds)));
+	} else
+		ASSERT_ZERO(cnt);
 
 	item = kdbus_get_item(info, KDBUS_ITEM_PIDS);
-	if (valid_flags_set & KDBUS_ATTACH_PIDS) {
-		ASSERT_RETURN(item);
+	if (valid_flags & KDBUS_ATTACH_PIDS) {
+		ASSERT_NONZERO(item);
 
 		/* Compare item->pids with cached PIDs */
-		ASSERT_RETURN(item->pids.pid == cached_pids.pid &&
-			      item->pids.tid == cached_pids.tid &&
-			      item->pids.ppid == cached_pids.ppid);
-	} else {
-		ASSERT_RETURN(item == NULL);
-	}
+		ASSERT_RETURN(item->pids.pid,==,cached_pids.pid);
+		ASSERT_RETURN(item->pids.tid,==,cached_pids.tid);
+		ASSERT_RETURN(item->pids.ppid,==,cached_pids.ppid);
+	} else
+		ASSERT_ZERO(item);
 
 	/* We did not request KDBUS_ITEM_CAPS */
 	item = kdbus_get_item(info, KDBUS_ITEM_CAPS);
-	ASSERT_RETURN(item == NULL);
+	ASSERT_ZERO(item);
 
-	kdbus_free(conn, offset);
+	ASSERT_ZERO(kdbus_free(conn, offset));
 
-	ret = kdbus_name_acquire(conn, "com.example.a", NULL);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn, "com.example.a", NULL));
 
-	ret = kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset));
 
 	info = (struct kdbus_info *)(conn->buf + offset);
-	ASSERT_RETURN(info->id == conn->id);
+	ASSERT_RETURN(info->id,==,conn->id);
 
 	item = kdbus_get_item(info, KDBUS_ITEM_OWNED_NAME);
-	if (valid_flags_set & KDBUS_ATTACH_NAMES) {
-		ASSERT_RETURN(item && !strcmp(item->name.name, "com.example.a"));
-	} else {
-		ASSERT_RETURN(item == NULL);
-	}
+	if (valid_flags & KDBUS_ATTACH_NAMES) {
+		ASSERT_NONZERO(item);
+		ASSERT_ZERO(strcmp(item->name.name, "com.example.a"));
+	} else
+		ASSERT_ZERO(item);
 
-	kdbus_free(conn, offset);
+	ASSERT_ZERO(kdbus_free(conn, offset));
 
-	ret = kdbus_conn_info(conn, 0, "com.example.a", valid_flags, &offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(conn, 0, "com.example.a", valid_flags, &offset));
 
 	info = (struct kdbus_info *)(conn->buf + offset);
-	ASSERT_RETURN(info->id == conn->id);
+	ASSERT_RETURN(info->id,==,conn->id);
 
-	kdbus_free(conn, offset);
+	ASSERT_ZERO(kdbus_free(conn, offset));
 
 	/* does not have the necessary caps to drop to unprivileged */
 	if (!capable)
 		goto continue_test;
 
-	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
-		ret = kdbus_conn_info(conn, conn->id, NULL,
-				      valid_flags, &offset);
-		ASSERT_EXIT(ret == 0);
+	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
+		ASSERT_EXIT_ZERO(kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset));
 
 		info = (struct kdbus_info *)(conn->buf + offset);
-		ASSERT_EXIT(info->id == conn->id);
+		ASSERT_EXIT(info->id,==,conn->id);
 
-		if (valid_flags_set & KDBUS_ATTACH_NAMES) {
-			item = kdbus_get_item(info, KDBUS_ITEM_OWNED_NAME);
-			ASSERT_EXIT(item &&
-				    strcmp(item->name.name,
-				           "com.example.a") == 0);
+		if (valid_flags & KDBUS_ATTACH_NAMES) {
+			ASSERT_EXIT_NONZERO(item = kdbus_get_item(info, KDBUS_ITEM_OWNED_NAME));
+			ASSERT_EXIT_ZERO(strcmp(item->name.name, "com.example.a"));
 		}
 
-		if (valid_flags_set & KDBUS_ATTACH_CREDS) {
-			item = kdbus_get_item(info, KDBUS_ITEM_CREDS);
-			ASSERT_EXIT(item);
+		if (valid_flags & KDBUS_ATTACH_CREDS) {
+			ASSERT_EXIT_NONZERO(item = kdbus_get_item(info, KDBUS_ITEM_CREDS));
 
 			/* Compare received items with cached creds */
-			ASSERT_EXIT(memcmp(&item->creds, &cached_creds,
-				    sizeof(struct kdbus_creds)) == 0);
+			ASSERT_EXIT_ZERO(memcmp(&item->creds, &cached_creds, sizeof(struct kdbus_creds)));
 		}
 
-		if (valid_flags_set & KDBUS_ATTACH_PIDS) {
-			item = kdbus_get_item(info, KDBUS_ITEM_PIDS);
-			ASSERT_EXIT(item);
+		if (valid_flags & KDBUS_ATTACH_PIDS) {
+			ASSERT_EXIT_NONZERO(item = kdbus_get_item(info, KDBUS_ITEM_PIDS));
 
 			/*
 			 * Compare item->pids with cached pids of
@@ -366,98 +311,83 @@ static int kdbus_fuzz_conn_info(struct kdbus_test_env *env, int capable)
 			 *
 			 * cmd_info will always return cached pids.
 			 */
-			ASSERT_EXIT(item->pids.pid == cached_pids.pid &&
-				    item->pids.tid == cached_pids.tid);
+			ASSERT_EXIT(item->pids.pid,==,cached_pids.pid);
+			ASSERT_EXIT(item->pids.tid,==,cached_pids.tid);
 		}
 
-		kdbus_free(conn, offset);
+		ASSERT_ZERO(kdbus_free(conn, offset));
 
 		/*
 		 * Use invalid_flags and make sure that userspace
 		 * do not play with us.
 		 */
-		ret = kdbus_conn_info(conn, conn->id, NULL,
-				      invalid_flags, &offset);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_conn_info(conn, conn->id, NULL, invalid_flags, &offset));
 
 		/*
 		 * Make sure that we return only one creds item and
 		 * it points to the cached creds.
 		 */
 		cnt = kdbus_count_item(info, KDBUS_ITEM_CREDS);
-		if (invalid_flags_set & KDBUS_ATTACH_CREDS) {
-			ASSERT_EXIT(cnt == 1);
+		if (invalid_flags & KDBUS_ATTACH_CREDS) {
+			ASSERT_EXIT(cnt,==,1U);
 
-			item = kdbus_get_item(info, KDBUS_ITEM_CREDS);
-			ASSERT_EXIT(item);
+			ASSERT_EXIT_NONZERO(item = kdbus_get_item(info, KDBUS_ITEM_CREDS));
 
 			/* Compare received items with cached creds */
-			ASSERT_EXIT(memcmp(&item->creds, &cached_creds,
-				    sizeof(struct kdbus_creds)) == 0);
-		} else {
-			ASSERT_EXIT(cnt == 0);
-		}
+			ASSERT_EXIT_ZERO(memcmp(&item->creds, &cached_creds, sizeof(struct kdbus_creds)));
+		} else
+			ASSERT_EXIT_ZERO(cnt);
 
-		if (invalid_flags_set & KDBUS_ATTACH_PIDS) {
+		if (invalid_flags & KDBUS_ATTACH_PIDS) {
 			cnt = kdbus_count_item(info, KDBUS_ITEM_PIDS);
-			ASSERT_EXIT(cnt == 1);
+			ASSERT_EXIT(cnt,==,1U);
 
-			item = kdbus_get_item(info, KDBUS_ITEM_PIDS);
-			ASSERT_EXIT(item);
+			ASSERT_EXIT_NONZERO(item = kdbus_get_item(info, KDBUS_ITEM_PIDS));
 
 			/* Compare item->pids with cached pids */
-			ASSERT_EXIT(item->pids.pid == cached_pids.pid &&
-				    item->pids.tid == cached_pids.tid);
+			ASSERT_EXIT(item->pids.pid,==,cached_pids.pid);
+			ASSERT_EXIT(item->pids.tid,==,cached_pids.tid);
 		}
 
 		cnt = kdbus_count_item(info, KDBUS_ITEM_CGROUP);
-		if (invalid_flags_set & KDBUS_ATTACH_CGROUP) {
-			ASSERT_EXIT(cnt == 1);
-		} else {
-			ASSERT_EXIT(cnt == 0);
-		}
+		if (invalid_flags & KDBUS_ATTACH_CGROUP)
+			ASSERT_EXIT(cnt,==,1U);
+		else
+			ASSERT_EXIT_ZERO(cnt);
 
 		cnt = kdbus_count_item(info, KDBUS_ITEM_CAPS);
-		if (invalid_flags_set & KDBUS_ATTACH_CAPS) {
-			ASSERT_EXIT(cnt == 1);
-		} else {
-			ASSERT_EXIT(cnt == 0);
-		}
+		if (invalid_flags & KDBUS_ATTACH_CAPS)
+			ASSERT_EXIT(cnt,==,1U);
+		else
+			ASSERT_EXIT_ZERO(cnt);
 
-		kdbus_free(conn, offset);
+		ASSERT_ZERO(kdbus_free(conn, offset));
 	}),
-	({ 0; }));
-	ASSERT_RETURN(ret == 0);
+	({}));
 
 continue_test:
 
 	/* A second name */
-	ret = kdbus_name_acquire(conn, "com.example.b", NULL);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn, "com.example.b", NULL));
 
-	ret = kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset));
 
 	info = (struct kdbus_info *)(conn->buf + offset);
-	ASSERT_RETURN(info->id == conn->id);
+	ASSERT_RETURN(info->id,==,conn->id);
 
 	cnt = kdbus_count_item(info, KDBUS_ITEM_OWNED_NAME);
-	if (valid_flags_set & KDBUS_ATTACH_NAMES) {
-		ASSERT_RETURN(cnt == 2);
-	} else {
-		ASSERT_RETURN(cnt == 0);
-	}
-
-	kdbus_free(conn, offset);
+	if (valid_flags & KDBUS_ATTACH_NAMES)
+		ASSERT_RETURN(cnt,==,2U);
+	else
+		ASSERT_RETURN(cnt,==,0U);
 
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_free(conn, offset));
 
 	return 0;
 }
 
-int kdbus_test_conn_info(struct kdbus_test_env *env)
+wur int kdbus_test_conn_info(struct kdbus_test_env *env)
 {
-	int ret;
 	int have_caps;
 	struct {
 		struct kdbus_cmd_info cmd_info;
@@ -474,8 +404,7 @@ int kdbus_test_conn_info(struct kdbus_test_env *env)
 	buf.cmd_info.attach_flags = 0;
 	buf.cmd_info.id = env->conn->id;
 
-	ret = kdbus_conn_info(env->conn, env->conn->id, NULL, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(env->conn, env->conn->id, NULL, 0, NULL));
 
 	/* try to pass a name that is longer than the buffer's size */
 	buf.name.size = KDBUS_ITEM_HEADER_SIZE + 1;
@@ -484,22 +413,19 @@ int kdbus_test_conn_info(struct kdbus_test_env *env)
 
 	buf.cmd_info.id = 0;
 	buf.cmd_info.size = sizeof(buf.cmd_info) + buf.name.size;
-	ret = kdbus_cmd_conn_info(env->conn->fd, (struct kdbus_cmd_info *) &buf);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_cmd_conn_info(env->conn->fd, (struct kdbus_cmd_info *) &buf));
 
 	/* Pass a non existent name */
-	ret = kdbus_conn_info(env->conn, 0, "non.existent.name", 0, NULL);
-	ASSERT_RETURN(ret == -ESRCH);
+	ASSERT_RETURN(-ESRCH,==,kdbus_conn_info(env->conn, 0, "non.existent.name", 0, NULL));
 
 	if (!all_uids_gids_are_mapped())
 		return TEST_SKIP;
 
 	/* Test for caps here, so we run the previous test */
 	have_caps = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-	ASSERT_RETURN(have_caps >= 0);
+	ASSERT_RETURN(have_caps,>=,0);
 
-	ret = kdbus_fuzz_conn_info(env, have_caps);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_fuzz_conn_info(env, have_caps));
 
 	/* Now if we have skipped some tests then let the user know */
 	if (!have_caps)
@@ -508,12 +434,11 @@ int kdbus_test_conn_info(struct kdbus_test_env *env)
 	return TEST_OK;
 }
 
-int kdbus_test_conn_update(struct kdbus_test_env *env)
+wur int kdbus_test_conn_update(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn;
 	struct kdbus_msg *msg;
 	int found = 0;
-	int ret;
 
 	/*
 	 * kdbus_hello() sets all attach flags. Receive a message by this
@@ -521,17 +446,14 @@ int kdbus_test_conn_update(struct kdbus_test_env *env)
 	 * present.
 	 */
 	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn);
 
-	ret = kdbus_msg_send(env->conn, NULL, 0x12345678, 0, 0, 0, conn->id,
-			     0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, NULL, 0x12345678, 0, 0, 0, conn->id));
 
-	ret = kdbus_msg_recv(conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(conn, &msg, NULL));
 
 	found = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-	ASSERT_RETURN(found == 1);
+	ASSERT_RETURN(found,==,1);
 
 	kdbus_msg_free(msg);
 
@@ -541,27 +463,17 @@ int kdbus_test_conn_update(struct kdbus_test_env *env)
 	 */
 	found = 0;
 
-	ret = kdbus_conn_update_attach_flags(conn,
-					     _KDBUS_ATTACH_ALL,
-					     _KDBUS_ATTACH_ALL &
-					     ~KDBUS_ATTACH_TIMESTAMP);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_attach_flags(conn, _KDBUS_ATTACH_ALL, _KDBUS_ATTACH_ALL & ~KDBUS_ATTACH_TIMESTAMP));
 
-	ret = kdbus_msg_send(env->conn, NULL, 0x12345678, 0, 0, 0, conn->id,
-			     0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, NULL, 0x12345678, 0, 0, 0, conn->id));
 
-	ret = kdbus_msg_recv(conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(conn, &msg, NULL));
 
 	found = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-	ASSERT_RETURN(found == 0);
+	ASSERT_ZERO(found);
 
 	/* Provide a bogus attach_flags value */
-	ret = kdbus_conn_update_attach_flags(conn,
-					     _KDBUS_ATTACH_ALL + 1,
-					     _KDBUS_ATTACH_ALL);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_conn_update_attach_flags(conn, _KDBUS_ATTACH_ALL + 1, _KDBUS_ATTACH_ALL));
 
 	kdbus_msg_free(msg);
 
@@ -570,15 +482,15 @@ int kdbus_test_conn_update(struct kdbus_test_env *env)
 	return TEST_OK;
 }
 
-int kdbus_test_writable_pool(struct kdbus_test_env *env)
+wur int kdbus_test_writable_pool(struct kdbus_test_env *env)
 {
 	struct kdbus_cmd_free cmd_free = {};
 	struct kdbus_cmd_hello hello;
-	int fd, ret;
+	int fd;
 	void *map;
 
 	fd = open(env->buspath, O_RDWR | O_CLOEXEC);
-	ASSERT_RETURN(fd >= 0);
+	ASSERT_RETURN(fd,>=,0);
 
 	memset(&hello, 0, sizeof(hello));
 	hello.flags = KDBUS_HELLO_ACCEPT_FD;
@@ -589,30 +501,27 @@ int kdbus_test_writable_pool(struct kdbus_test_env *env)
 	hello.offset = (__u64)-1;
 
 	/* success test */
-	ret = kdbus_cmd_hello(fd, &hello);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_hello(fd, &hello));
 
 	/* The kernel should have returned some items */
-	ASSERT_RETURN(hello.offset != (__u64)-1);
+	ASSERT_RETURN(hello.offset,!=,(__u64)-1);
 	cmd_free.size = sizeof(cmd_free);
 	cmd_free.offset = hello.offset;
-	ret = kdbus_cmd_free(fd, &cmd_free);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_ZERO(kdbus_cmd_free(fd, &cmd_free));
 
 	/* pools cannot be mapped writable */
 	map = mmap(NULL, POOL_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-	ASSERT_RETURN(map == MAP_FAILED);
+	ASSERT_RETURN(map,==,MAP_FAILED);
 
 	/* pools can always be mapped readable */
 	map = mmap(NULL, POOL_SIZE, PROT_READ, MAP_SHARED, fd, 0);
-	ASSERT_RETURN(map != MAP_FAILED);
+	ASSERT_RETURN(map,!=,MAP_FAILED);
 
 	/* make sure we cannot change protection masks to writable */
-	ret = mprotect(map, POOL_SIZE, PROT_READ | PROT_WRITE);
-	ASSERT_RETURN(ret < 0);
+	ASSERT_RETURN(0,>,mprotect(map, POOL_SIZE, PROT_READ | PROT_WRITE));
 
 	munmap(map, POOL_SIZE);
-	close(fd);
+	CLOSE(fd);
 
 	return TEST_OK;
 }
diff --git a/tools/testing/selftests/kdbus/test-daemon.c b/tools/testing/selftests/kdbus/test-daemon.c
index 8bc2386190d9..066940ea805e 100644
--- a/tools/testing/selftests/kdbus/test-daemon.c
+++ b/tools/testing/selftests/kdbus/test-daemon.c
@@ -15,7 +15,7 @@
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
 
-int kdbus_test_daemon(struct kdbus_test_env *env)
+wur int kdbus_test_daemon(struct kdbus_test_env *env)
 {
 	struct pollfd fds[2];
 	int count;
@@ -25,17 +25,16 @@ int kdbus_test_daemon(struct kdbus_test_env *env)
 	if (!kdbus_util_verbose)
 		return TEST_OK;
 
-	printf("Created connection %llu on bus '%s'\n",
+	print("Created connection %llu on bus '%s'\n",
 		(unsigned long long) env->conn->id, env->buspath);
 
-	ret = kdbus_name_acquire(env->conn, "com.example.kdbus-test", NULL);
-	ASSERT_RETURN(ret == 0);
-	printf("  Aquired name: com.example.kdbus-test\n");
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, "com.example.kdbus-test", NULL));
+	print("  Aquired name: com.example.kdbus-test\n");
 
 	fds[0].fd = env->conn->fd;
 	fds[1].fd = STDIN_FILENO;
 
-	printf("Monitoring connections:\n");
+	print("Monitoring connections:\n");
 
 	for (count = 0;; count++) {
 		int i, nfds = sizeof(fds) / sizeof(fds[0]);
@@ -49,17 +48,15 @@ int kdbus_test_daemon(struct kdbus_test_env *env)
 		if (ret <= 0)
 			break;
 
-		if (fds[0].revents & POLLIN) {
-			ret = kdbus_msg_recv(env->conn, NULL, NULL);
-			ASSERT_RETURN(ret == 0);
-		}
+		if (fds[0].revents & POLLIN)
+			ASSERT_ZERO(kdbus_msg_recv(env->conn, NULL, NULL));
 
 		/* stdin */
 		if (fds[1].revents & POLLIN)
 			break;
 	}
 
-	printf("Closing bus connection\n");
+	print("Closing bus connection\n");
 
 	return TEST_OK;
 }
diff --git a/tools/testing/selftests/kdbus/test-endpoint.c b/tools/testing/selftests/kdbus/test-endpoint.c
index dcc6ab91c4e6..a3e143fb26b5 100644
--- a/tools/testing/selftests/kdbus/test-endpoint.c
+++ b/tools/testing/selftests/kdbus/test-endpoint.c
@@ -19,7 +19,7 @@
 
 #define KDBUS_SYSNAME_MAX_LEN			63
 
-static int install_name_add_match(struct kdbus_conn *conn, const char *name)
+static wur int install_name_add_match(struct kdbus_conn *conn, const char *name)
 {
 	struct {
 		struct kdbus_cmd_match cmd;
@@ -48,7 +48,7 @@ static int install_name_add_match(struct kdbus_conn *conn, const char *name)
 	return 0;
 }
 
-static int create_endpoint(const char *buspath, uid_t uid, const char *name,
+static wur int create_endpoint(const char *buspath, uid_t uid, const char *name,
 			   uint64_t flags)
 {
 	struct {
@@ -92,34 +92,33 @@ static int create_endpoint(const char *buspath, uid_t uid, const char *name,
 	return fd;
 }
 
-static int unpriv_test_custom_ep(const char *buspath)
+static wur int unpriv_test_custom_ep(const char *buspath)
 {
 	int ret, ep_fd1, ep_fd2;
 	char *ep1, *ep2, *tmp1, *tmp2;
 
-	tmp1 = strdup(buspath);
-	tmp2 = strdup(buspath);
-	ASSERT_RETURN(tmp1 && tmp2);
+	ASSERT_NONZERO(tmp1 = strdup(buspath));
+	ASSERT_NONZERO(tmp2 = strdup(buspath));
 
 	ret = asprintf(&ep1, "%s/%u-%s", dirname(tmp1), getuid(), "apps1");
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>,0);
 
 	ret = asprintf(&ep2, "%s/%u-%s", dirname(tmp2), getuid(), "apps2");
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>,0);
 
 	free(tmp1);
 	free(tmp2);
 
 	/* endpoint only accessible to current uid */
 	ep_fd1 = create_endpoint(buspath, getuid(), "apps1", 0);
-	ASSERT_RETURN(ep_fd1 >= 0);
+	ASSERT_RETURN(ep_fd1,>=,0);
 
 	/* endpoint world accessible */
 	ep_fd2 = create_endpoint(buspath, getuid(), "apps2",
 				  KDBUS_MAKE_ACCESS_WORLD);
-	ASSERT_RETURN(ep_fd2 >= 0);
+	ASSERT_RETURN(ep_fd2,>=,0);
 
-	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
+	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
 		int ep_fd;
 		struct kdbus_conn *ep_conn;
 
@@ -129,35 +128,34 @@ static int unpriv_test_custom_ep(const char *buspath)
 		 */
 		ep_fd = create_endpoint(buspath, getuid(),
 					"unpriv_costum_ep", 0);
-		ASSERT_EXIT(ep_fd == -EPERM);
+		ASSERT_EXIT(ep_fd,==,-EPERM);
 
 		/*
 		 * Endpoint "apps1" only accessible to same users,
 		 * that own the endpoint. Access denied by VFS
 		 */
 		ep_conn = kdbus_hello(ep1, 0, NULL, 0);
-		ASSERT_EXIT(!ep_conn && errno == EACCES);
+		ASSERT_EXIT(errno,==,EACCES);
+		ASSERT_EXIT_ZERO(ep_conn);
 
 		/* Endpoint "apps2" world accessible */
-		ep_conn = kdbus_hello(ep2, 0, NULL, 0);
-		ASSERT_EXIT(ep_conn);
+		ASSERT_EXIT_NONZERO(ep_conn = kdbus_hello(ep2, 0, NULL, 0));
 
 		kdbus_conn_free(ep_conn);
 
-		_exit(EXIT_SUCCESS);
+		exit(EXIT_SUCCESS);
 	}),
-	({ 0; }));
-	ASSERT_RETURN(ret == 0);
+	({}));
 
-	close(ep_fd1);
-	close(ep_fd2);
+	CLOSE(ep_fd1);
+	CLOSE(ep_fd2);
 	free(ep1);
 	free(ep2);
 
 	return 0;
 }
 
-static int update_endpoint(int fd, const char *name)
+static wur int update_endpoint(int fd, const char *name)
 {
 	int len = strlen(name) + 1;
 	struct {
@@ -200,7 +198,7 @@ static int update_endpoint(int fd, const char *name)
 	return 0;
 }
 
-int kdbus_test_custom_endpoint(struct kdbus_test_env *env)
+wur int kdbus_test_custom_endpoint(struct kdbus_test_env *env)
 {
 	char *ep, *tmp;
 	int ret, ep_fd;
@@ -214,46 +212,38 @@ int kdbus_test_custom_endpoint(struct kdbus_test_env *env)
 	memset(fake_ep, 'X', sizeof(fake_ep) - 1);
 
 	/* Try to create a custom endpoint with a long name */
-	ret = create_endpoint(env->buspath, getuid(), fake_ep, 0);
-	ASSERT_RETURN(ret == -ENAMETOOLONG);
+	ASSERT_RETURN(-ENAMETOOLONG,==,create_endpoint(env->buspath, getuid(), fake_ep, 0));
 
 	/* Try to create a custom endpoint with a different uid */
-	ret = create_endpoint(env->buspath, getuid() + 1, "foobar", 0);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,create_endpoint(env->buspath, getuid() + 1, "foobar", 0));
 
 	/* create a custom endpoint, and open a connection on it */
-	ep_fd = create_endpoint(env->buspath, getuid(), "foo", 0);
-	ASSERT_RETURN(ep_fd >= 0);
+	ASSERT_RETURN(0,<=,ep_fd = create_endpoint(env->buspath, getuid(), "foo", 0));
 
-	tmp = strdup(env->buspath);
-	ASSERT_RETURN(tmp);
-
-	ret = asprintf(&ep, "%s/%u-%s", dirname(tmp), getuid(), epname);
+	ASSERT_NONZERO(tmp = strdup(env->buspath));
+	ASSERT_RETURN(0,<=,asprintf(&ep, "%s/%u-%s", dirname(tmp), getuid(), epname));
 	free(tmp);
-	ASSERT_RETURN(ret >= 0);
 
 	/* Register a connection that listen to broadcasts */
-	reader = kdbus_hello(ep, 0, NULL, 0);
-	ASSERT_RETURN(reader);
+	ASSERT_NONZERO(reader = kdbus_hello(ep, 0, NULL, 0));
 
 	/* Register to kernel signals */
-	ret = kdbus_add_match_id(reader, 0x1, KDBUS_ITEM_ID_ADD,
-				 KDBUS_MATCH_ID_ANY);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_add_match_id(reader, 0x2, KDBUS_ITEM_ID_REMOVE,
-				 KDBUS_MATCH_ID_ANY);
-	ASSERT_RETURN(ret == 0);
-
-	ret = install_name_add_match(reader, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_id(reader, 0x1, KDBUS_ITEM_ID_ADD, KDBUS_MATCH_ID_ANY));
+	ASSERT_ZERO(kdbus_add_match_id(reader, 0x2, KDBUS_ITEM_ID_REMOVE, KDBUS_MATCH_ID_ANY));
+	ASSERT_ZERO(install_name_add_match(reader, name));
 
 	/* Monitor connections are not supported on custom endpoints */
 	ep_conn = kdbus_hello(ep, KDBUS_HELLO_MONITOR, NULL, 0);
-	ASSERT_RETURN(!ep_conn && errno == EOPNOTSUPP);
+	ASSERT_RETURN(errno,==,EOPNOTSUPP);
+	ASSERT_ZERO(ep_conn);
 
-	ep_conn = kdbus_hello(ep, 0, NULL, 0);
-	ASSERT_RETURN(ep_conn);
+	ASSERT_NONZERO(ep_conn = kdbus_hello(ep, 0, NULL, 0));
+
+	/* Check that the reader got the IdAdd notification */
+	ASSERT_ZERO(kdbus_msg_recv(reader, &msg, NULL));
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_ID_ADD);
+	ASSERT_RETURN(msg->items[0].id_change.id,==,ep_conn->id);
+	kdbus_msg_free(msg);
 
 	/*
 	 * Add a name add match on the endpoint connection, acquire name from
@@ -262,80 +252,62 @@ int kdbus_test_custom_endpoint(struct kdbus_test_env *env)
 	 * endpoint connection may not be able to call conn_info, neither on
 	 * the name nor on the ID.
 	 */
-	ret = install_name_add_match(ep_conn, name);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(install_name_add_match(ep_conn, name));
 
-	ret = kdbus_msg_recv(ep_conn, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, NULL));
 
-	ret = kdbus_conn_info(ep_conn, 0, name, 0, NULL);
-	ASSERT_RETURN(ret == -ESRCH);
+	ASSERT_RETURN(ONTIZEN(0,-EAGAIN),==,kdbus_msg_recv(ep_conn, NULL, NULL));
+	ASSERT_RETURN(ONTIZEN(0,-ESRCH),==,kdbus_conn_info(ep_conn, 0, name, 0, NULL));
+	ASSERT_RETURN(-ESRCH,==,kdbus_conn_info(ep_conn, 0, "random.crappy.name", 0, NULL));
+	ASSERT_RETURN(ONTIZEN(0,-ENXIO),==,kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL));
+	ASSERT_RETURN(-ENXIO,==,kdbus_conn_info(ep_conn, 0x0fffffffffffffffULL, NULL, 0, NULL));
 
-	ret = kdbus_conn_info(ep_conn, 0, "random.crappy.name", 0, NULL);
-	ASSERT_RETURN(ret == -ESRCH);
-
-	ret = kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL);
-	ASSERT_RETURN(ret == -ENXIO);
-
-	ret = kdbus_conn_info(ep_conn, 0x0fffffffffffffffULL, NULL, 0, NULL);
-	ASSERT_RETURN(ret == -ENXIO);
-
-	/* Check that the reader did not receive anything */
-	ret = kdbus_msg_recv(reader, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	/* Check that the reader did not receive the name notification */
+	ASSERT_RETURN(ONTIZEN(0,-EAGAIN),==,kdbus_msg_recv(reader, NULL, NULL));
 
 	/*
 	 * Release the name again, update the custom endpoint policy,
 	 * and try again. This time, the connection on the custom endpoint
 	 * should have gotten it.
 	 */
-	ret = kdbus_name_release(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_release(env->conn, name));
 
-	ret = update_endpoint(ep_fd, name);
-	ASSERT_RETURN(ret == 0);
+	/* Check that the reader did not receive the name notification */
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(reader, NULL, NULL));
 
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(update_endpoint(ep_fd, name));
 
-	ret = kdbus_msg_recv(ep_conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_ADD);
-	ASSERT_RETURN(msg->items[0].name_change.old_id.id == 0);
-	ASSERT_RETURN(msg->items[0].name_change.new_id.id == env->conn->id);
-	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, NULL));
+
+	ASSERT_ZERO(kdbus_msg_recv(ep_conn, &msg, NULL));
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_NAME_ADD);
+	ASSERT_ZERO(msg->items[0].name_change.old_id.id);
+	ASSERT_RETURN(msg->items[0].name_change.new_id.id,==,env->conn->id);
+	ASSERT_ZERO(strcmp(msg->items[0].name_change.name, name));
 	kdbus_msg_free(msg);
 
-	ret = kdbus_msg_recv(reader, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
+	ASSERT_ZERO(kdbus_msg_recv(reader, &msg, NULL));
+	ASSERT_ZERO(strcmp(msg->items[0].name_change.name, name));
 
 	kdbus_msg_free(msg);
 
-	ret = kdbus_conn_info(ep_conn, 0, name, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(ep_conn, 0, name, 0, NULL));
 
-	ret = kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL));
 
 	/* If we have privileges test custom endpoints */
 	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>=,0);
 
 	/*
 	 * All uids/gids are mapped and we have the necessary caps
 	 */
-	if (ret && all_uids_gids_are_mapped()) {
-		ret = unpriv_test_custom_ep(env->buspath);
-		ASSERT_RETURN(ret == 0);
-	}
+	if (ret && all_uids_gids_are_mapped())
+		ASSERT_ZERO(unpriv_test_custom_ep(env->buspath));
 
 	kdbus_conn_free(reader);
 	kdbus_conn_free(ep_conn);
-	close(ep_fd);
+	CLOSE(ep_fd);
 
 	return TEST_OK;
 }
diff --git a/tools/testing/selftests/kdbus/test-fd.c b/tools/testing/selftests/kdbus/test-fd.c
index bfd8980e0004..6f315a99496d 100644
--- a/tools/testing/selftests/kdbus/test-fd.c
+++ b/tools/testing/selftests/kdbus/test-fd.c
@@ -13,29 +13,30 @@
 #include <sys/mman.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
+#include <sys/eventfd.h>
 
 #include "kdbus-api.h"
 #include "kdbus-test.h"
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
 
-#define KDBUS_MSG_MAX_ITEMS     128
-#define KDBUS_USER_MAX_CONN	256
+#define KDBUS_MSG_MAX_ITEMS     128U
+#define KDBUS_USER_MAX_CONN	256U
 
 /* maximum number of inflight fds in a target queue per user */
-#define KDBUS_CONN_MAX_FDS_PER_USER	16
+#define KDBUS_CONN_MAX_FDS_PER_USER	16U
 
 /* maximum number of memfd items per message */
-#define KDBUS_MSG_MAX_MEMFD_ITEMS       16
+#define KDBUS_MSG_MAX_MEMFD_ITEMS       16U
 
-static int make_msg_payload_dbus(uint64_t src_id, uint64_t dst_id,
+static wur int make_msg_payload_dbus(uint64_t src_id, uint64_t dst_id,
 				 uint64_t msg_size,
 				 struct kdbus_msg **msg_dbus)
 {
 	struct kdbus_msg *msg;
 
-	msg = malloc(msg_size);
-	ASSERT_RETURN_VAL(msg, -ENOMEM);
+	msg = alloc(msg_size);
+	ASSERT_RETURN_VAL(msg,!=,NULL, -ENOMEM);
 
 	memset(msg, 0, msg_size);
 	msg->size = msg_size;
@@ -74,24 +75,24 @@ static void make_item_fds(struct kdbus_item *item,
 		item->fds[i] = fd_array[i];
 }
 
-static int memfd_write(const char *name, void *buf, size_t bufsize)
+static wur int memfd_write(const char *name, void *buf, size_t bufsize)
 {
 	ssize_t ret;
 	int memfd;
 
 	memfd = sys_memfd_create(name, 0);
-	ASSERT_RETURN_VAL(memfd >= 0, memfd);
+	ASSERT_RETURN_VAL(memfd,>=,0, memfd);
 
 	ret = write(memfd, buf, bufsize);
-	ASSERT_RETURN_VAL(ret == (ssize_t)bufsize, -EAGAIN);
+	ASSERT_RETURN_VAL(ret,==,(ssize_t)bufsize, -EAGAIN);
 
 	ret = sys_memfd_seal_set(memfd);
-	ASSERT_RETURN_VAL(ret == 0, -errno);
+	ASSERT_RETURN_VAL(ret,==,0, -errno);
 
 	return memfd;
 }
 
-static int send_memfds(struct kdbus_conn *conn, uint64_t dst_id,
+static wur int send_memfds(struct kdbus_conn *conn, uint64_t dst_id,
 		       int *memfds_array, size_t memfd_count)
 {
 	struct kdbus_cmd_send cmd = {};
@@ -107,7 +108,7 @@ static int send_memfds(struct kdbus_conn *conn, uint64_t dst_id,
 		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
 
 	ret = make_msg_payload_dbus(conn->id, dst_id, size, &msg);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	item = msg->items;
 
@@ -134,7 +135,7 @@ static int send_memfds(struct kdbus_conn *conn, uint64_t dst_id,
 	return 0;
 }
 
-static int send_fds(struct kdbus_conn *conn, uint64_t dst_id,
+static wur int send_fds(struct kdbus_conn *conn, uint64_t dst_id,
 		    int *fd_array, size_t fd_count)
 {
 	struct kdbus_cmd_send cmd = {};
@@ -150,7 +151,7 @@ static int send_fds(struct kdbus_conn *conn, uint64_t dst_id,
 		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
 
 	ret = make_msg_payload_dbus(conn->id, dst_id, size, &msg);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	item = msg->items;
 
@@ -177,7 +178,7 @@ static int send_fds(struct kdbus_conn *conn, uint64_t dst_id,
 	return ret;
 }
 
-static int send_fds_memfds(struct kdbus_conn *conn, uint64_t dst_id,
+static wur int send_fds_memfds(struct kdbus_conn *conn, uint64_t dst_id,
 			   int *fds_array, size_t fd_count,
 			   int *memfds_array, size_t memfd_count)
 {
@@ -192,7 +193,7 @@ static int send_fds_memfds(struct kdbus_conn *conn, uint64_t dst_id,
 	size += KDBUS_ITEM_SIZE(sizeof(int) * fd_count);
 
 	ret = make_msg_payload_dbus(conn->id, dst_id, size, &msg);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	item = msg->items;
 
@@ -213,33 +214,7 @@ static int send_fds_memfds(struct kdbus_conn *conn, uint64_t dst_id,
 	return ret;
 }
 
-/* Return the number of received fds */
-static unsigned int kdbus_item_get_nfds(struct kdbus_msg *msg)
-{
-	unsigned int fds = 0;
-	const struct kdbus_item *item;
-
-	KDBUS_ITEM_FOREACH(item, msg, items) {
-		switch (item->type) {
-		case KDBUS_ITEM_FDS: {
-			fds += (item->size - KDBUS_ITEM_HEADER_SIZE) /
-				sizeof(int);
-			break;
-		}
-
-		case KDBUS_ITEM_PAYLOAD_MEMFD:
-			fds++;
-			break;
-
-		default:
-			break;
-		}
-	}
-
-	return fds;
-}
-
-static struct kdbus_msg *
+static wur struct kdbus_msg *
 get_kdbus_msg_with_fd(struct kdbus_conn *conn_src,
 		      uint64_t dst_id, uint64_t cookie, int fd)
 {
@@ -253,7 +228,7 @@ get_kdbus_msg_with_fd(struct kdbus_conn *conn_src,
 		size += KDBUS_ITEM_SIZE(sizeof(int));
 
 	ret = make_msg_payload_dbus(conn_src->id, dst_id, size, &msg);
-	ASSERT_RETURN_VAL(ret == 0, NULL);
+	ASSERT_RETURN_VAL(ret,==,0, NULL);
 
 	msg->cookie = cookie;
 
@@ -266,7 +241,7 @@ get_kdbus_msg_with_fd(struct kdbus_conn *conn_src,
 	return msg;
 }
 
-static int kdbus_test_no_fds(struct kdbus_test_env *env,
+static wur int kdbus_test_no_fds(struct kdbus_test_env *env,
 			     int *fds, int *memfd)
 {
 	pid_t pid;
@@ -279,84 +254,75 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 	struct kdbus_cmd_send cmd = {};
 	struct kdbus_cmd_free cmd_free = {};
 
-	conn_src = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_src);
+	ASSERT_NONZERO(conn_src = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	connfd1 = open(env->buspath, O_RDWR|O_CLOEXEC);
-	ASSERT_RETURN(connfd1 >= 0);
+	ASSERT_RETURN(connfd1,>=,0);
 
 	connfd2 = open(env->buspath, O_RDWR|O_CLOEXEC);
-	ASSERT_RETURN(connfd2 >= 0);
+	ASSERT_RETURN(connfd2,>=,0);
 
 	/*
 	 * Create connections without KDBUS_HELLO_ACCEPT_FD
 	 * to test if send fd operations are blocked
 	 */
-	conn_dst = malloc(sizeof(*conn_dst));
-	ASSERT_RETURN(conn_dst);
-
-	conn_dummy = malloc(sizeof(*conn_dummy));
-	ASSERT_RETURN(conn_dummy);
+	ASSERT_NONZERO(conn_dst = alloc(sizeof(*conn_dst)));
+	ASSERT_NONZERO(conn_dummy = alloc(sizeof(*conn_dummy)));
 
 	memset(&hello, 0, sizeof(hello));
 	hello.size = sizeof(struct kdbus_cmd_hello);
 	hello.pool_size = POOL_SIZE;
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
 
-	ret = kdbus_cmd_hello(connfd1, &hello);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_hello(connfd1, &hello));
 
 	cmd_free.size = sizeof(cmd_free);
 	cmd_free.offset = hello.offset;
-	ret = kdbus_cmd_free(connfd1, &cmd_free);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_ZERO(kdbus_cmd_free(connfd1, &cmd_free));
 
 	conn_dst->fd = connfd1;
 	conn_dst->id = hello.id;
+	conn_dst->attach_flags_recv = 0;
 
 	memset(&hello, 0, sizeof(hello));
 	hello.size = sizeof(struct kdbus_cmd_hello);
 	hello.pool_size = POOL_SIZE;
 	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
 
-	ret = kdbus_cmd_hello(connfd2, &hello);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_hello(connfd2, &hello));
 
 	cmd_free.size = sizeof(cmd_free);
 	cmd_free.offset = hello.offset;
-	ret = kdbus_cmd_free(connfd2, &cmd_free);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_ZERO(kdbus_cmd_free(connfd2, &cmd_free));
 
 	conn_dummy->fd = connfd2;
 	conn_dummy->id = hello.id;
+	conn_dummy->attach_flags_recv = 0;
 
 	conn_dst->buf = mmap(NULL, POOL_SIZE, PROT_READ,
 			     MAP_SHARED, connfd1, 0);
-	ASSERT_RETURN(conn_dst->buf != MAP_FAILED);
+	ASSERT_RETURN(conn_dst->buf,!=,MAP_FAILED);
 
 	conn_dummy->buf = mmap(NULL, POOL_SIZE, PROT_READ,
 			       MAP_SHARED, connfd2, 0);
-	ASSERT_RETURN(conn_dummy->buf != MAP_FAILED);
+	ASSERT_RETURN(conn_dummy->buf,!=,MAP_FAILED);
 
 	/*
 	 * Send fds to connection that do not accept fd passing
 	 */
-	ret = send_fds(conn_src, conn_dst->id, fds, 1);
-	ASSERT_RETURN(ret == -ECOMM);
+	ASSERT_RETURN(-ECOMM,==,send_fds(conn_src, conn_dst->id, fds, 1));
 
 	/*
 	 * memfd are kdbus payload
 	 */
-	ret = send_memfds(conn_src, conn_dst->id, memfd, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_memfds(conn_src, conn_dst->id, memfd, 1));
 
-	ret = kdbus_msg_recv_poll(conn_dst, 100, NULL, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(conn_dst, 100, NULL, NULL));
 
 	cookie = time(NULL);
 
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, pid);
+	ASSERT_RETURN_VAL(pid,>=,0, pid);
 
 	if (pid == 0) {
 		struct timespec now;
@@ -365,13 +331,9 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 		 * A sync send/reply to a connection that do not
 		 * accept fds should fail if it contains an fd
 		 */
-		msg_sync_reply = get_kdbus_msg_with_fd(conn_dst,
-						       conn_dummy->id,
-						       cookie, fds[0]);
-		ASSERT_EXIT(msg_sync_reply);
+		ASSERT_EXIT_NONZERO(msg_sync_reply = get_kdbus_msg_with_fd(conn_dst, conn_dummy->id, cookie, fds[0]));
 
-		ret = clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(clock_gettime(CLOCK_MONOTONIC_COARSE, &now));
 
 		msg_sync_reply->timeout_ns = now.tv_sec * 1000000000ULL +
 					     now.tv_nsec + 100000000ULL;
@@ -382,8 +344,7 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 		cmd.msg_address = (uintptr_t)msg_sync_reply;
 		cmd.flags = KDBUS_SEND_SYNC_REPLY;
 
-		ret = kdbus_cmd_send(conn_dst->fd, &cmd);
-		ASSERT_EXIT(ret == -ECOMM);
+		ASSERT_EXIT(-ECOMM,==,kdbus_cmd_send(conn_dst->fd, &cmd));
 
 		/*
 		 * Now send a normal message, but the sync reply
@@ -393,28 +354,23 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 		 * The original sender will fail with -ETIMEDOUT
 		 */
 		cookie++;
-		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-					  KDBUS_MSG_EXPECT_REPLY,
-					  5000000000ULL, 0, conn_src->id, -1);
-		ASSERT_EXIT(ret == -EREMOTEIO);
+		ASSERT_EXIT(-EREMOTEIO,==,kdbus_msg_send_sync(conn_dst, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, 5000000000ULL, 0, conn_src->id, -1));
 
 		cookie++;
-		ret = kdbus_msg_recv_poll(conn_dst, 100, &msg, NULL);
-		ASSERT_EXIT(ret == 0);
-		ASSERT_EXIT(msg->cookie == cookie);
+		ASSERT_EXIT_ZERO(kdbus_msg_recv_poll(conn_dst, 100, &msg, NULL));
+		ASSERT_EXIT(msg->cookie,==,cookie);
 
 		free(msg_sync_reply);
 		kdbus_msg_free(msg);
 
-		_exit(EXIT_SUCCESS);
+		exit(EXIT_SUCCESS);
 	}
 
-	ret = kdbus_msg_recv_poll(conn_dummy, 100, NULL, NULL);
-	ASSERT_RETURN(ret == -ETIMEDOUT);
+	ASSERT_RETURN(-ETIMEDOUT,==,kdbus_msg_recv_poll(conn_dummy, 100, NULL, NULL));
 
 	cookie++;
-	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv_poll(conn_src, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
 
@@ -425,7 +381,7 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 	msg_sync_reply = get_kdbus_msg_with_fd(conn_src,
 					       conn_dst->id,
 					       cookie, conn_dst->fd);
-	ASSERT_RETURN(msg_sync_reply);
+	ASSERT_NONZERO(msg_sync_reply);
 
 	msg_sync_reply->cookie_reply = cookie;
 
@@ -433,8 +389,7 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 	cmd.size = sizeof(cmd);
 	cmd.msg_address = (uintptr_t)msg_sync_reply;
 
-	ret = kdbus_cmd_send(conn_src->fd, &cmd);
-	ASSERT_RETURN(ret == -EOPNOTSUPP);
+	ASSERT_RETURN(-EOPNOTSUPP,==,kdbus_cmd_send(conn_src->fd, &cmd));
 
 	free(msg_sync_reply);
 
@@ -447,7 +402,7 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 	msg_sync_reply = get_kdbus_msg_with_fd(conn_src,
 					       conn_dst->id,
 					       cookie, fds[0]);
-	ASSERT_RETURN(msg_sync_reply);
+	ASSERT_NONZERO(msg_sync_reply);
 
 	msg_sync_reply->cookie_reply = cookie;
 
@@ -455,8 +410,7 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 	cmd.size = sizeof(cmd);
 	cmd.msg_address = (uintptr_t)msg_sync_reply;
 
-	ret = kdbus_cmd_send(conn_src->fd, &cmd);
-	ASSERT_RETURN(ret == -ECOMM);
+	ASSERT_RETURN(-ECOMM,==,kdbus_cmd_send(conn_src->fd, &cmd));
 
 	free(msg_sync_reply);
 
@@ -465,12 +419,10 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 	 * is clear
 	 */
 	cookie++;
-	ret = kdbus_msg_send(conn_src, NULL, cookie, 0, 0, 0,
-			     conn_dst->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn_src, NULL, cookie, 0, 0, 0, conn_dst->id));
 
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
 	kdbus_conn_free(conn_dummy);
 	kdbus_conn_free(conn_dst);
@@ -479,179 +431,217 @@ static int kdbus_test_no_fds(struct kdbus_test_env *env,
 	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
 }
 
-static int kdbus_send_multiple_fds(struct kdbus_conn *conn_src,
+#define VALUE_CHECKED_SEED 0
+uint64_t value_checked_out = VALUE_CHECKED_SEED;
+uint64_t value_checked_in = VALUE_CHECKED_SEED;
+
+#define MAKE_FDS_(ARRAY_NAME,MAKE_ELEM) do {\
+	unsigned _MAKE_FDS_i_ = 0;\
+	do {\
+		ASSERT_RETURN(-1,==,ARRAY_NAME[_MAKE_FDS_i_]);\
+		ARRAY_NAME[_MAKE_FDS_i_] = MAKE_ELEM(++value_checked_out);\
+		ASSERT_RETURN(0,<=,ARRAY_NAME[_MAKE_FDS_i_]);\
+	} while (++_MAKE_FDS_i_ < ELEMENTSOF(ARRAY_NAME));\
+} while (0)
+
+#define REMAKE_FDS_(ARRAY_NAME,MAKE_ELEM) do {\
+	CLOSE_FDS(ARRAY_NAME);\
+	MAKE_FDS_(ARRAY_NAME,MAKE_ELEM);\
+} while (0)
+
+static wur int make_value_checked_fd(uint64_t value) {
+	int fd = eventfd(0, EFD_CLOEXEC);
+	if (fd < 0) {
+		int ret = -errno;
+		return ret<0 ? ret : -817;
+	}
+	if (eventfd_write(fd, value)) {
+		int ret = -errno;
+		return ret<0 ? ret : -818;
+	}
+	return fd;
+}
+static wur int make_value_checked_memfd(uint64_t value) {
+	return memfd_write("memfd-name", &value, sizeof(value));
+}
+
+#define D_FDS(ARRAY_NAME,COUNT) int ARRAY_NAME[COUNT] = { [0 ... COUNT-1] = -1 }
+
+#define CLOSE_FDS(ARRAY_NAME) do {\
+	unsigned _CLOSE_FDS_i_ = 0;\
+	do {\
+		ASSERT_RETURN(0,<=,ARRAY_NAME[_CLOSE_FDS_i_]);\
+		CLOSE(ARRAY_NAME[_CLOSE_FDS_i_]);\
+		ARRAY_NAME[_CLOSE_FDS_i_] = -1;\
+	} while (++_CLOSE_FDS_i_ < ELEMENTSOF(ARRAY_NAME));\
+} while (0)
+
+#define MAKE_FDS(ARRAY_NAME)    MAKE_FDS_(ARRAY_NAME, make_value_checked_fd)
+#define MAKE_MEMFDS(ARRAY_NAME) MAKE_FDS_(ARRAY_NAME, make_value_checked_memfd)
+#define REMAKE_FDS(ARRAY_NAME)    REMAKE_FDS_(ARRAY_NAME, make_value_checked_fd)
+#define REMAKE_MEMFDS(ARRAY_NAME) REMAKE_FDS_(ARRAY_NAME, make_value_checked_memfd)
+
+static wur int check_fds(int togo, int total_count, struct kdbus_msg const *msg) {
+	struct kdbus_item const *item;
+	int surplus_count;
+	ASSERT_RETURN(0,<,togo);
+	ASSERT_RETURN(togo,<=,total_count);
+	surplus_count = total_count - togo;
+	KDBUS_ITEM_FOREACH(item, msg, items)
+		if (KDBUS_ITEM_FDS == item->type) {
+			unsigned n = (item->size - KDBUS_ITEM_HEADER_SIZE) / sizeof(int);
+			unsigned i = 0;
+			ASSERT_NONZERO(togo);
+			for (; i < n; ++i) {
+				int fd = item->fds[i];
+				if (-1 != fd) {
+					eventfd_t value = VALUE_CHECKED_SEED;
+					ASSERT_ZERO(eventfd_read(fd, &value));
+					ASSERT_RETURN(value,==,++value_checked_in);
+					--togo;
+				}
+			}
+			ASSERT_ZERO(togo);
+		}
+	ASSERT_ZERO(togo);
+	value_checked_in += surplus_count;
+	return 0;
+}
+
+static wur int check_memfds(int togo, int total_count, struct kdbus_msg const *msg) {
+	struct kdbus_item const *item;
+	int surplus_count;
+	ASSERT_RETURN(0,<,togo);
+	ASSERT_RETURN(togo,<=,total_count);
+	surplus_count = total_count - togo;
+	KDBUS_ITEM_FOREACH(item, msg, items)
+		if (KDBUS_ITEM_PAYLOAD_MEMFD == item->type) {
+			int fd;
+			ASSERT_NONZERO(togo);
+			fd = item->memfd.fd;
+			if (-1 != fd) {
+				typeof(value_checked_in) *buf;
+				off_t size;
+				--togo;
+				ASSERT_ZERO(sys_memfd_get_size(fd, &size));
+				ASSERT_RETURN(size,==,(typeof(size))sizeof(value_checked_in));
+				ASSERT_RETURN((uint64_t)size,==,item->memfd.size);
+				ASSERT_RETURN(MAP_FAILED, !=, (buf = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0)));
+				ASSERT_RETURN(*buf,==,++value_checked_in);
+				ASSERT_ZERO(munmap(buf, size));
+			}
+		}
+	ASSERT_ZERO(togo);
+	value_checked_in += surplus_count;
+	return 0;
+}
+
+#define CHECK_FDS(ARRAY,COUNT,MSG) ASSERT_ZERO(check_fds((COUNT), ELEMENTSOF((ARRAY)), (MSG)))
+#define CHECK_MEMFDS(ARRAY,COUNT,MSG) ASSERT_ZERO(check_memfds((COUNT), ELEMENTSOF((ARRAY)), (MSG)))
+
+static wur int kdbus_send_multiple_fds(struct kdbus_conn *conn_src,
 				   struct kdbus_conn *conn_dst)
 {
-	int ret, i;
-	unsigned int nfds;
-	int fds[KDBUS_CONN_MAX_FDS_PER_USER + 1];
-	int memfds[KDBUS_MSG_MAX_ITEMS + 1];
+	D_FDS(fds, KDBUS_CONN_MAX_FDS_PER_USER + 1);
+	D_FDS(memfds, KDBUS_MSG_MAX_ITEMS + 1);
 	struct kdbus_msg *msg;
-	uint64_t dummy_value;
 
-	dummy_value = time(NULL);
-
-	for (i = 0; i < KDBUS_CONN_MAX_FDS_PER_USER + 1; i++) {
-		fds[i] = open("/dev/null", O_RDWR|O_CLOEXEC);
-		ASSERT_RETURN_VAL(fds[i] >= 0, -errno);
-	}
+	MAKE_FDS(fds);
 
 	/* Send KDBUS_CONN_MAX_FDS_PER_USER with one more fd */
-	ret = send_fds(conn_src, conn_dst->id, fds,
-		       KDBUS_CONN_MAX_FDS_PER_USER + 1);
-	ASSERT_RETURN(ret == -EMFILE);
+	ASSERT_RETURN(-EMFILE,==,send_fds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER + 1));
 
 	/* Retry with the correct KDBUS_CONN_MAX_FDS_PER_USER */
-	ret = send_fds(conn_src, conn_dst->id, fds,
-		       KDBUS_CONN_MAX_FDS_PER_USER);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-
-	/* Check we got the right number of fds */
-	nfds = kdbus_item_get_nfds(msg);
-	ASSERT_RETURN(nfds == KDBUS_CONN_MAX_FDS_PER_USER);
-
+	ASSERT_ZERO(send_fds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER));
+	ASSERT_ZERO(kdbus_msg_recv(conn_dst, &msg, NULL));
+	CHECK_FDS(fds, KDBUS_CONN_MAX_FDS_PER_USER, msg);
 	kdbus_msg_free(msg);
 
-	for (i = 0; i < KDBUS_MSG_MAX_ITEMS + 1; i++, dummy_value++) {
-		memfds[i] = memfd_write("memfd-name",
-					&dummy_value,
-					sizeof(dummy_value));
-		ASSERT_RETURN_VAL(memfds[i] >= 0, memfds[i]);
-	}
+	MAKE_MEMFDS(memfds);
 
 	/* Send KDBUS_MSG_MAX_ITEMS with one more memfd */
-	ret = send_memfds(conn_src, conn_dst->id,
-			  memfds, KDBUS_MSG_MAX_ITEMS + 1);
-	ASSERT_RETURN(ret == -E2BIG);
-
-	ret = send_memfds(conn_src, conn_dst->id,
-			  memfds, KDBUS_MSG_MAX_MEMFD_ITEMS + 1);
-	ASSERT_RETURN(ret == -E2BIG);
+	ASSERT_RETURN(-E2BIG,==,send_memfds(conn_src, conn_dst->id, memfds, KDBUS_MSG_MAX_ITEMS + 1));
+	ASSERT_RETURN(-E2BIG,==,send_memfds(conn_src, conn_dst->id, memfds, KDBUS_MSG_MAX_MEMFD_ITEMS + 1));
 
 	/* Retry with the correct KDBUS_MSG_MAX_ITEMS */
-	ret = send_memfds(conn_src, conn_dst->id,
-			  memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_memfds(conn_src, conn_dst->id, memfds, KDBUS_MSG_MAX_MEMFD_ITEMS));
+	ASSERT_ZERO(kdbus_msg_recv(conn_dst, &msg, NULL));
 
 	/* Check we got the right number of fds */
-	nfds = kdbus_item_get_nfds(msg);
-	ASSERT_RETURN(nfds == KDBUS_MSG_MAX_MEMFD_ITEMS);
-
+	CHECK_MEMFDS(memfds, KDBUS_MSG_MAX_MEMFD_ITEMS, msg);
 	kdbus_msg_free(msg);
 
+	/* reinitialize descriptors and cookies to check no stale data gets passed */
+	REMAKE_FDS(fds);
+	REMAKE_MEMFDS(memfds);
 
 	/*
 	 * Combine multiple KDBUS_CONN_MAX_FDS_PER_USER+1 fds and
 	 * 10 memfds
 	 */
-	ret = send_fds_memfds(conn_src, conn_dst->id,
-			      fds, KDBUS_CONN_MAX_FDS_PER_USER + 1,
-			      memfds, 10);
-	ASSERT_RETURN(ret == -EMFILE);
-
-	ret = kdbus_msg_recv(conn_dst, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EMFILE,==,send_fds_memfds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER + 1, memfds, 10));
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn_dst, NULL, NULL));
 
 	/*
 	 * Combine multiple KDBUS_CONN_MAX_FDS_PER_USER fds and
 	 * (128 - 1) + 1 memfds, all fds take one item, while each
 	 * memfd takes one item
 	 */
-	ret = send_fds_memfds(conn_src, conn_dst->id,
-			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-			      memfds, (KDBUS_MSG_MAX_ITEMS - 1) + 1);
-	ASSERT_RETURN(ret == -E2BIG);
-
-	ret = send_fds_memfds(conn_src, conn_dst->id,
-			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-			      memfds, KDBUS_MSG_MAX_MEMFD_ITEMS + 1);
-	ASSERT_RETURN(ret == -E2BIG);
-
-	ret = kdbus_msg_recv(conn_dst, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-E2BIG,==,send_fds_memfds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER, memfds, (KDBUS_MSG_MAX_ITEMS - 1) + 1));
+	ASSERT_RETURN(-E2BIG,==,send_fds_memfds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER, memfds, KDBUS_MSG_MAX_MEMFD_ITEMS + 1));
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn_dst, NULL, NULL));
 
 	/*
 	 * Send KDBUS_CONN_MAX_FDS_PER_USER fds +
 	 * KDBUS_MSG_MAX_MEMFD_ITEMS memfds
 	 */
-	ret = send_fds_memfds(conn_src, conn_dst->id,
-			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-			      memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_fds_memfds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER, memfds, KDBUS_MSG_MAX_MEMFD_ITEMS));
 
-	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(conn_dst, &msg, NULL));
 
 	/* Check we got the right number of fds */
-	nfds = kdbus_item_get_nfds(msg);
-	ASSERT_RETURN(nfds == KDBUS_CONN_MAX_FDS_PER_USER +
-			      KDBUS_MSG_MAX_MEMFD_ITEMS);
-
+	CHECK_FDS(fds, KDBUS_CONN_MAX_FDS_PER_USER, msg);
+	CHECK_MEMFDS(memfds, KDBUS_MSG_MAX_MEMFD_ITEMS, msg);
 	kdbus_msg_free(msg);
 
+	/* reinitialize descriptors and cookies to check no stale data gets passed */
+	REMAKE_FDS(fds);
+	REMAKE_MEMFDS(memfds);
 
 	/*
 	 * Re-send fds + memfds, close them, but do not receive them
 	 * and try to queue more
 	 */
-	ret = send_fds_memfds(conn_src, conn_dst->id,
-			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-			      memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_fds_memfds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER, memfds, KDBUS_MSG_MAX_MEMFD_ITEMS));
 
 	/* close old references and get a new ones */
-	for (i = 0; i < KDBUS_CONN_MAX_FDS_PER_USER + 1; i++) {
-		close(fds[i]);
-		fds[i] = open("/dev/null", O_RDWR|O_CLOEXEC);
-		ASSERT_RETURN_VAL(fds[i] >= 0, -errno);
-	}
+	REMAKE_FDS(fds);
 
 	/* should fail since we have already fds in the queue */
-	ret = send_fds(conn_src, conn_dst->id, fds,
-		       KDBUS_CONN_MAX_FDS_PER_USER);
-	ASSERT_RETURN(ret == -EMFILE);
+	ASSERT_RETURN(-EMFILE,==,send_fds(conn_src, conn_dst->id, fds, KDBUS_CONN_MAX_FDS_PER_USER));
 
 	/* This should succeed */
-	ret = send_memfds(conn_src, conn_dst->id,
-			  memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-
-	nfds = kdbus_item_get_nfds(msg);
-	ASSERT_RETURN(nfds == KDBUS_CONN_MAX_FDS_PER_USER +
-			      KDBUS_MSG_MAX_MEMFD_ITEMS);
-
+	ASSERT_ZERO(send_memfds(conn_src, conn_dst->id, memfds, KDBUS_MSG_MAX_MEMFD_ITEMS));
+	ASSERT_ZERO(kdbus_msg_recv(conn_dst, &msg, NULL));
+	CHECK_FDS(fds, KDBUS_CONN_MAX_FDS_PER_USER, msg);
+	CHECK_MEMFDS(memfds, KDBUS_MSG_MAX_MEMFD_ITEMS, msg);
 	kdbus_msg_free(msg);
 
-	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-
-	nfds = kdbus_item_get_nfds(msg);
-	ASSERT_RETURN(nfds == KDBUS_MSG_MAX_MEMFD_ITEMS);
-
+	ASSERT_ZERO(kdbus_msg_recv(conn_dst, &msg, NULL));
+	/* retransmission of memfds from before - roll back the counter before checking */
+	value_checked_in -= ELEMENTSOF(memfds);
+	CHECK_MEMFDS(memfds, KDBUS_MSG_MAX_MEMFD_ITEMS, msg);
 	kdbus_msg_free(msg);
 
-	ret = kdbus_msg_recv(conn_dst, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn_dst, NULL, NULL));
 
-	for (i = 0; i < KDBUS_CONN_MAX_FDS_PER_USER + 1; i++)
-		close(fds[i]);
-
-	for (i = 0; i < KDBUS_MSG_MAX_ITEMS + 1; i++)
-		close(memfds[i]);
+	CLOSE_FDS(fds);
+	CLOSE_FDS(memfds);
 
 	return 0;
 }
 
-int kdbus_test_fd_passing(struct kdbus_test_env *env)
+wur int kdbus_test_fd_passing(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn_src, *conn_dst;
 	const char *str = "stackenblocken";
@@ -668,53 +658,56 @@ int kdbus_test_fd_passing(struct kdbus_test_env *env)
 	now = (uint64_t) time(NULL);
 
 	/* create two connections */
-	conn_src = kdbus_hello(env->buspath, 0, NULL, 0);
-	conn_dst = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_src && conn_dst);
+	ASSERT_NONZERO(conn_src = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(conn_dst = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	fds_conn[0] = conn_src->fd;
 	fds_conn[1] = conn_dst->fd;
 
-	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, sock_pair);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(socketpair(AF_UNIX, SOCK_STREAM, 0, sock_pair));
 
 	/* Setup memfd */
 	memfd = memfd_write("memfd-name", &now, sizeof(now));
-	ASSERT_RETURN(memfd >= 0);
+	ASSERT_RETURN(memfd,>=,0);
 
 	/* Setup pipes */
-	ret = pipe(fds);
-	ASSERT_RETURN(ret == 0);
+	while ((ret = pipe(fds))) /* work around intermittent pipe failure on tizen 3.0 */
+		sleep(1);
+	ASSERT_ZERO(ret);
 
 	i = write(fds[1], str, strlen(str));
-	ASSERT_RETURN(i == strlen(str));
+	ASSERT_RETURN(i,==,strlen(str));
 
 	/*
-	 * Try to ass the handle of a connection as message payload.
+	 * Try to pass the handle of a connection as message payload.
 	 * This must fail.
 	 */
-	ret = send_fds(conn_src, conn_dst->id, fds_conn, 2);
-	ASSERT_RETURN(ret == -ENOTSUP);
-
-	ret = send_fds(conn_dst, conn_src->id, fds_conn, 2);
-	ASSERT_RETURN(ret == -ENOTSUP);
+	ASSERT_RETURN(-ENOTSUP,==,send_fds(conn_src, conn_dst->id, fds_conn, 2));
+	ASSERT_RETURN(-ENOTSUP,==,send_fds(conn_dst, conn_src->id, fds_conn, 2));
 
-	ret = send_fds(conn_src, conn_dst->id, sock_pair, 2);
-	ASSERT_RETURN(ret == -ENOTSUP);
+	/*
+	 * Tizen: socket passing is allowed.
+	 */
+	ASSERT_ZERO(send_fds(conn_src, conn_dst->id, sock_pair, 2));
+	ASSERT_ZERO(kdbus_msg_recv(conn_dst, &msg, NULL));
+	KDBUS_ITEM_FOREACH(item, msg, items)
+		if (item->type == KDBUS_ITEM_FDS) {
+			int nfds = (item->size - KDBUS_ITEM_HEADER_SIZE) /
+					sizeof(int);
+			ASSERT_RETURN(nfds,==,2);
+		}
+	kdbus_msg_free(msg);
 
 	/*
 	 * Send fds and memfds to connection that do not accept fds
 	 */
-	ret = kdbus_test_no_fds(env, fds, (int *)&memfd);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_test_no_fds(env, fds, (int *)&memfd));
 
 	/* Try to broadcast file descriptors. This must fail. */
-	ret = send_fds(conn_src, KDBUS_DST_ID_BROADCAST, fds, 1);
-	ASSERT_RETURN(ret == -ENOTUNIQ);
+	ASSERT_RETURN(-ENOTUNIQ,==,send_fds(conn_src, KDBUS_DST_ID_BROADCAST, fds, 1));
 
 	/* Try to broadcast memfd. This must succeed. */
-	ret = send_memfds(conn_src, KDBUS_DST_ID_BROADCAST, (int *)&memfd, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_memfds(conn_src, KDBUS_DST_ID_BROADCAST, (int *)&memfd, 1));
 
 	/* Open code this loop */
 loop_send_fds:
@@ -722,27 +715,26 @@ loop_send_fds:
 	/*
 	 * Send the read end of the pipe and close it.
 	 */
-	ret = send_fds(conn_src, conn_dst->id, fds, 1);
-	ASSERT_RETURN(ret == 0);
-	close(fds[0]);
+	ASSERT_ZERO(send_fds(conn_src, conn_dst->id, fds, 1));
+	CLOSE(fds[0]);
 
-	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(conn_dst, &msg, NULL));
 
 	KDBUS_ITEM_FOREACH(item, msg, items) {
 		if (item->type == KDBUS_ITEM_FDS) {
 			char tmp[14];
 			int nfds = (item->size - KDBUS_ITEM_HEADER_SIZE) /
 					sizeof(int);
-			ASSERT_RETURN(nfds == 1);
+			ASSERT_RETURN(sizeof(tmp),==,strlen(str));
+			ASSERT_RETURN(nfds,==,1);
 
 			i = read(item->fds[0], tmp, sizeof(tmp));
 			if (i != 0) {
-				ASSERT_RETURN(i == sizeof(tmp));
-				ASSERT_RETURN(memcmp(tmp, str, sizeof(tmp)) == 0);
+				ASSERT_RETURN(i,==,sizeof(tmp));
+				ASSERT_ZERO(memcmp(tmp, str, sizeof(tmp)));
 
 				/* Write EOF */
-				close(fds[1]);
+				CLOSE(fds[1]);
 
 				/*
 				 * Resend the read end of the pipe,
@@ -759,7 +751,7 @@ loop_send_fds:
 			 * of the pipe, other references are
 			 * automatically closed just after send.
 			 */
-			close(item->fds[0]);
+			CLOSE(item->fds[0]);
 		}
 	}
 
@@ -769,18 +761,15 @@ loop_send_fds:
 	 * references to it. We assume the above since sender and
 	 * receiver are on the same process.
 	 */
-	ret = send_fds(conn_src, conn_dst->id, fds, 1);
-	ASSERT_RETURN(ret == -EBADF);
+	ASSERT_RETURN(-EBADF,==,send_fds(conn_src, conn_dst->id, fds, 1));
 
 	/* Then we clear out received any data... */
-	kdbus_msg_free(msg);
 
-	ret = kdbus_send_multiple_fds(conn_src, conn_dst);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_send_multiple_fds(conn_src, conn_dst));
 
-	close(sock_pair[0]);
-	close(sock_pair[1]);
-	close(memfd);
+	CLOSE(sock_pair[0]);
+	CLOSE(sock_pair[1]);
+	CLOSE(memfd);
 
 	kdbus_conn_free(conn_src);
 	kdbus_conn_free(conn_dst);
diff --git a/tools/testing/selftests/kdbus/test-free.c b/tools/testing/selftests/kdbus/test-free.c
index f666da3e87cc..2ec652f4c07b 100644
--- a/tools/testing/selftests/kdbus/test-free.c
+++ b/tools/testing/selftests/kdbus/test-free.c
@@ -14,51 +14,98 @@
 #include "kdbus-enum.h"
 #include "kdbus-test.h"
 
-static int sample_ioctl_call(struct kdbus_test_env *env)
+wur static int sample_ioctl_call(struct kdbus_test_env *env, unsigned *poff, unsigned *psize)
 {
-	int ret;
+	unsigned off, size;
 	struct kdbus_cmd_list cmd_list = {
-		.flags = KDBUS_LIST_QUEUED,
+		.flags = KDBUS_LIST_UNIQUE,
 		.size = sizeof(cmd_list),
 	};
 
-	ret = kdbus_cmd_list(env->conn->fd, &cmd_list);
-	ASSERT_RETURN(ret == 0);
-
 	/* DON'T FREE THIS SLICE OF MEMORY! */
+	ASSERT_ZERO(kdbus_cmd_list(env->conn->fd, &cmd_list));
+
+	#define A(L,R) do { ASSERT_RETURN((typeof(L))(R),==,(R)); *p##L = L = (R); } while (0)
+		A(off, cmd_list.offset);
+		ASSERT_RETURN(off,<,POOL_SIZE);
+		A(size, ((struct kdbus_info *)((uintptr_t)env->conn->buf + off))->size);
+	#undef A
+
+	ASSERT_RETURN(off+size,<,POOL_SIZE);
+	ASSERT_RETURN(off+size,>=,size);
+	ASSERT_RETURN(off+size,>,off);
+	ASSERT_ZERO(size % 8);
+	ASSERT_RETURN(size,>=,sizeof(struct kdbus_info));
+
+	/*print("off(%u) size(%u)\n", *offset, *size);*/
 
 	return TEST_OK;
 }
 
+wur static int area_before(unsigned off_left, unsigned size_left, unsigned off_right)
+{
+	ASSERT_RETURN(off_left+size_left,<=,off_right);
+	return 0;
+}
+
 int kdbus_test_free(struct kdbus_test_env *env)
 {
-	int ret;
 	struct kdbus_cmd_free cmd_free = {};
+	unsigned offset[20], size[TABSIZE(offset)];
+	unsigned i;
 
 	/* free an unallocated buffer */
 	cmd_free.size = sizeof(cmd_free);
 	cmd_free.flags = 0;
 	cmd_free.offset = 0;
-	ret = kdbus_cmd_free(env->conn->fd, &cmd_free);
-	ASSERT_RETURN(ret == -ENXIO);
+	ASSERT_RETURN(-ENXIO,==,kdbus_cmd_free(env->conn->fd, &cmd_free));
 
 	/* free a buffer out of the pool's bounds */
 	cmd_free.size = sizeof(cmd_free);
 	cmd_free.offset = POOL_SIZE + 1;
-	ret = kdbus_cmd_free(env->conn->fd, &cmd_free);
-	ASSERT_RETURN(ret == -ENXIO);
+	ASSERT_RETURN(-ENXIO,==,kdbus_cmd_free(env->conn->fd, &cmd_free));
 
 	/*
 	 * The user application is responsible for freeing the allocated
 	 * memory with the KDBUS_CMD_FREE ioctl, so let's test what happens
 	 * if we forget about it.
+	 *
+	 * Assert that memory areas don't overlap.
 	 */
 
-	ret = sample_ioctl_call(env);
-	ASSERT_RETURN(ret == 0);
+	for (i=0; i<TABSIZE(offset); ++i) {
+		unsigned off, siz;
+		int j;
+		ASSERT_ZERO(sample_ioctl_call(env, &off, &siz));
+		for (j=i-1; j>=0; --j) {
+			if (offset[j] > off) {
+				ASSERT_ZERO(area_before(off,siz,offset[j]));
+				offset[j+1] = offset[j];
+				size[j+1] = size[j];
+			} else {
+				ASSERT_ZERO(area_before(offset[j],size[j],off));
+				break;
+			}
+		}
+		ASSERT_RETURN(j+1,>=,0);
+		ASSERT_RETURN((unsigned)(j+1),<=,i);
+		offset[j+1] = off;
+		size[j+1] = siz;
+	}
 
-	ret = sample_ioctl_call(env);
-	ASSERT_RETURN(ret == 0);
+	/* attempt to free invalid offsets around the ones above to test the underlying allocator */
+	{
+		unsigned j, last = offset[TABSIZE(offset)-1] + size[TABSIZE(offset)-1] + 1;
+		for (i=j=0; i<last; ++i) {
+			if (i == offset[j]) {
+				++i;
+				++j;
+			}
+			cmd_free.size = sizeof(cmd_free);
+			cmd_free.offset = i;
+			ASSERT_RETURN(-ENXIO,==,kdbus_cmd_free(env->conn->fd, &cmd_free));
+		}
+	}
 
 	return TEST_OK;
 }
diff --git a/tools/testing/selftests/kdbus/test-match.c b/tools/testing/selftests/kdbus/test-match.c
index 2360dc1d76a4..6c35baf25d42 100644
--- a/tools/testing/selftests/kdbus/test-match.c
+++ b/tools/testing/selftests/kdbus/test-match.c
@@ -14,7 +14,7 @@
 #include "kdbus-enum.h"
 #include "kdbus-test.h"
 
-int kdbus_test_match_id_add(struct kdbus_test_env *env)
+static wur int add_id_match_(struct kdbus_conn *conn, uint64_t flags, uint64_t notification_type, uint64_t id)
 {
 	struct {
 		struct kdbus_cmd_match cmd;
@@ -24,135 +24,101 @@ int kdbus_test_match_id_add(struct kdbus_test_env *env)
 			struct kdbus_notify_id_change chg;
 		} item;
 	} buf;
-	struct kdbus_conn *conn;
-	struct kdbus_msg *msg;
-	int ret;
-
 	memset(&buf, 0, sizeof(buf));
-
 	buf.cmd.size = sizeof(buf);
 	buf.cmd.cookie = 0xdeafbeefdeaddead;
+	buf.cmd.flags = flags;
 	buf.item.size = sizeof(buf.item);
-	buf.item.type = KDBUS_ITEM_ID_ADD;
-	buf.item.chg.id = KDBUS_MATCH_ID_ANY;
+	buf.item.type = notification_type;
+	buf.item.chg.id = id;
+	ASSERT_ZERO(kdbus_cmd_match_add(conn->fd, &buf.cmd));
+	return 0;
+}
+#define ADD_ID_MATCH(CONN,FLAGS,NOTIFICATION_TYPE,ID)\
+	ASSERT_ZERO(add_id_match_((CONN),(FLAGS),KDBUS_ITEM_ID_##NOTIFICATION_TYPE,(ID)))
+
+wur int kdbus_test_match_id_add(struct kdbus_test_env *env)
+{
+	struct kdbus_conn *conn;
+	struct kdbus_msg *msg;
 
 	/* match on id add */
-	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-	ASSERT_RETURN(ret == 0);
+	ADD_ID_MATCH(env->conn, 0, ADD, KDBUS_MATCH_ID_ANY);
 
 	/* create 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* 1st connection should have received a notification */
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_NO_PENDING(env->conn);
 
-	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_ADD);
-	ASSERT_RETURN(msg->items[0].id_change.id == conn->id);
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_ID_ADD);
+	ASSERT_RETURN(msg->items[0].id_change.id,==,conn->id);
 
 	kdbus_conn_free(conn);
 
 	return TEST_OK;
 }
 
-int kdbus_test_match_id_remove(struct kdbus_test_env *env)
+wur int kdbus_test_match_id_remove(struct kdbus_test_env *env)
 {
-	struct {
-		struct kdbus_cmd_match cmd;
-		struct {
-			uint64_t size;
-			uint64_t type;
-			struct kdbus_notify_id_change chg;
-		} item;
-	} buf;
 	struct kdbus_conn *conn;
 	struct kdbus_msg *msg;
 	size_t id;
-	int ret;
 
 	/* create 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 	id = conn->id;
 
-	memset(&buf, 0, sizeof(buf));
-	buf.cmd.size = sizeof(buf);
-	buf.cmd.cookie = 0xdeafbeefdeaddead;
-	buf.item.size = sizeof(buf.item);
-	buf.item.type = KDBUS_ITEM_ID_REMOVE;
-	buf.item.chg.id = id;
-
-	/* register match on 2nd connection */
-	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-	ASSERT_RETURN(ret == 0);
+	/* register match on 1st connection */
+	ADD_ID_MATCH(env->conn, 0, REMOVE, id);
 
 	/* remove 2nd connection again */
 	kdbus_conn_free(conn);
 
 	/* 1st connection should have received a notification */
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
 
-	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_REMOVE);
-	ASSERT_RETURN(msg->items[0].id_change.id == id);
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_ID_REMOVE);
+	ASSERT_RETURN(msg->items[0].id_change.id,==,id);
 
 	return TEST_OK;
 }
 
-int kdbus_test_match_replace(struct kdbus_test_env *env)
+wur int kdbus_test_match_replace(struct kdbus_test_env *env)
 {
-	struct {
-		struct kdbus_cmd_match cmd;
-		struct {
-			uint64_t size;
-			uint64_t type;
-			struct kdbus_notify_id_change chg;
-		} item;
-	} buf;
 	struct kdbus_conn *conn;
 	struct kdbus_msg *msg;
 	size_t id;
-	int ret;
 
 	/* add a match to id_add */
-	ASSERT_RETURN(kdbus_test_match_id_add(env) == TEST_OK);
+	ASSERT_RETURN(kdbus_test_match_id_add(env),==,TEST_OK);
 
 	/* do a replace of the match from id_add to id_remove */
-	memset(&buf, 0, sizeof(buf));
-
-	buf.cmd.size = sizeof(buf);
-	buf.cmd.cookie = 0xdeafbeefdeaddead;
-	buf.cmd.flags = KDBUS_MATCH_REPLACE;
-	buf.item.size = sizeof(buf.item);
-	buf.item.type = KDBUS_ITEM_ID_REMOVE;
-	buf.item.chg.id = KDBUS_MATCH_ID_ANY;
-
-	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
+	ADD_ID_MATCH(env->conn, KDBUS_MATCH_REPLACE, REMOVE, KDBUS_MATCH_ID_ANY);
 
 	/* create 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 	id = conn->id;
 
 	/* 1st connection should _not_ have received a notification */
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret != 0);
+	ASSERT_NONZERO(kdbus_msg_recv(env->conn, &msg, NULL));
 
 	/* remove 2nd connection */
 	kdbus_conn_free(conn);
 
 	/* 1st connection should _now_ have received a notification */
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
 
-	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_REMOVE);
-	ASSERT_RETURN(msg->items[0].id_change.id == id);
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_ID_REMOVE);
+	ASSERT_RETURN(msg->items[0].id_change.id,==,id);
 
 	return TEST_OK;
 }
 
-int kdbus_test_match_name_add(struct kdbus_test_env *env)
+#define UNMATCHED_NAME "this.will.never.match"
+
+static wur int add_name_match_(struct kdbus_conn *conn, uint64_t flags, uint64_t old_id, uint64_t new_id, uint64_t notification_type, char const *name)
 {
 	struct {
 		struct kdbus_cmd_match cmd;
@@ -163,152 +129,203 @@ int kdbus_test_match_name_add(struct kdbus_test_env *env)
 		} item;
 		char name[64];
 	} buf;
-	struct kdbus_msg *msg;
-	char *name;
-	int ret;
-
-	name = "foo.bla.blaz";
-
-	/* install the match rule */
 	memset(&buf, 0, sizeof(buf));
-	buf.item.type = KDBUS_ITEM_NAME_ADD;
-	buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
-	buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
-	strncpy(buf.name, name, sizeof(buf.name) - 1);
-	buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
+	buf.cmd.flags = flags;
+	buf.cmd.cookie = 0xdeaddeaddeafbeef;
+	buf.item.type = notification_type;
+	buf.item.chg.old_id.id = old_id;
+	buf.item.chg.new_id.id = new_id;
+	buf.item.size = sizeof(buf.item);
+	if (name) {
+		__auto_type name_size = strlen(name)+1;
+		memcpy(buf.name, name, name_size);
+		buf.item.size += name_size;
+	}
 	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
+	ASSERT_ZERO(kdbus_cmd_match_add(conn->fd, &buf.cmd));
+	return 0;
+}
+#define ADD_NAME_MATCH(CONN,FLAGS,OLD_ID,NEW_ID,NOTIFICATION_TYPE,NAME)\
+	ASSERT_ZERO(add_name_match_((CONN),(FLAGS),(OLD_ID),(NEW_ID),KDBUS_ITEM_NAME_##NOTIFICATION_TYPE,(NAME)))
 
-	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-	ASSERT_RETURN(ret == 0);
+static wur int assert_single_match_(struct kdbus_conn *conn, uint64_t old_id, uint64_t new_id, uint64_t notification_type, char const *name)
+{
+	struct kdbus_msg *msg;
+	ASSERT_ZERO(kdbus_msg_recv(conn, &msg, NULL));
+	ASSERT_RETURN(msg->items[0].type,==,notification_type);
+	ASSERT_RETURN(msg->items[0].name_change.old_id.id,==,old_id);
+	ASSERT_RETURN(msg->items[0].name_change.new_id.id,==,new_id);
+	ASSERT_ZERO(strcmp(msg->items[0].name_change.name, name));
+	ASSERT_ZERO(kdbus_free_msg(conn, msg));
+	ASSERT_NO_PENDING(conn);
+	return 0;
+}
+#define ASSERT_SINGLE_MATCH(CONN,OLD_ID,NEW_ID,NOTIFICATION_TYPE,NAME)\
+	ASSERT_ZERO(assert_single_match_((CONN),(OLD_ID),(NEW_ID),KDBUS_ITEM_NAME_##NOTIFICATION_TYPE,(NAME)))
 
+static wur int kdbus_test_match_name_add_(struct kdbus_test_env *env, char const *name, struct kdbus_conn *listener)
+{
 	/* acquire the name */
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, NULL));
 
-	/* we should have received a notification */
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	#define CHECK(CONN) ASSERT_SINGLE_MATCH((CONN), 0, env->conn->id, ADD, name)
+		CHECK(env->conn);
+		if (listener)
+			CHECK(listener);
+	#undef CHECK
 
-	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_ADD);
-	ASSERT_RETURN(msg->items[0].name_change.old_id.id == 0);
-	ASSERT_RETURN(msg->items[0].name_change.new_id.id == env->conn->id);
-	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
+	ASSERT_ZERO(kdbus_name_release(env->conn, name));
 
-	return TEST_OK;
+	return 0;
 }
 
-int kdbus_test_match_name_remove(struct kdbus_test_env *env)
+wur int kdbus_test_match_name_add(struct kdbus_test_env *env)
 {
-	struct {
-		struct kdbus_cmd_match cmd;
-		struct {
-			uint64_t size;
-			uint64_t type;
-			struct kdbus_notify_name_change chg;
-		} item;
-		char name[64];
-	} buf;
-	struct kdbus_msg *msg;
-	char *name;
-	int ret;
+	struct kdbus_conn *listener;
+	char const *name = "foo.bla.blaz";
 
-	name = "foo.bla.blaz";
-
-	/* acquire the name */
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_NONZERO(listener = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* install the match rule */
-	memset(&buf, 0, sizeof(buf));
-	buf.item.type = KDBUS_ITEM_NAME_REMOVE;
-	buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
-	buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
-	strncpy(buf.name, name, sizeof(buf.name) - 1);
-	buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
-	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
+	ADD_NAME_MATCH(env->conn, 0, KDBUS_MATCH_ID_ANY, KDBUS_MATCH_ID_ANY, ADD, name);
+
+	/* no accidental notifications when no match set up */
+	ASSERT_ZERO(kdbus_test_match_name_add_(env, name, NULL));
+	ASSERT_NO_PENDING(listener);
+
+	#define CHECK(ID,NAME,CONN_IF_WILL_MATCH) do {\
+		ADD_NAME_MATCH(listener, KDBUS_MATCH_REPLACE, KDBUS_MATCH_ID_ANY, (ID), ADD, NAME);\
+		ASSERT_ZERO(kdbus_test_match_name_add_(env, name, (CONN_IF_WILL_MATCH)));\
+		ASSERT_NO_PENDING(listener);\
+	} while (0)
+		CHECK(KDBUS_MATCH_ID_ANY, UNMATCHED_NAME, NULL); /* wrong name */
+		CHECK(KDBUS_MATCH_ID_ANY, NULL, listener); /* wildcard name */
+		CHECK(env->conn->id, NULL, listener); /* wildcard name + good id */
+		CHECK(env->conn->id + 1, NULL, NULL); /* wildcard name + bad id */
+	#undef CHECK
+	kdbus_conn_free(listener);
 
-	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-	ASSERT_RETURN(ret == 0);
+	return 0;
+}
+
+static wur int kdbus_test_match_name_remove_(struct kdbus_test_env *env, char const *name, struct kdbus_conn *listener)
+{
+	/* acquire the name */
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, NULL));
 
 	/* release the name again */
-	kdbus_name_release(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_release(env->conn, name));
 
 	/* we should have received a notification */
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	#define CHECK(CONN) ASSERT_SINGLE_MATCH((CONN), env->conn->id, 0, REMOVE, name)
+		CHECK(env->conn);
+		if (listener)
+			CHECK(listener);
+	#undef CHECK
 
-	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_REMOVE);
-	ASSERT_RETURN(msg->items[0].name_change.old_id.id == env->conn->id);
-	ASSERT_RETURN(msg->items[0].name_change.new_id.id == 0);
-	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
-
-	return TEST_OK;
+	return 0;
 }
 
-int kdbus_test_match_name_change(struct kdbus_test_env *env)
+wur int kdbus_test_match_name_remove(struct kdbus_test_env *env)
 {
-	struct {
-		struct kdbus_cmd_match cmd;
-		struct {
-			uint64_t size;
-			uint64_t type;
-			struct kdbus_notify_name_change chg;
-		} item;
-		char name[64];
-	} buf;
-	struct kdbus_conn *conn;
-	struct kdbus_msg *msg;
-	uint64_t flags;
-	char *name = "foo.bla.baz";
-	int ret;
+	struct kdbus_conn *listener;
+	char const *name = "foo.bla.blazz";
 
-	/* acquire the name */
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_NONZERO(listener = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* install the match rule */
-	memset(&buf, 0, sizeof(buf));
-	buf.item.type = KDBUS_ITEM_NAME_CHANGE;
-	buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
-	buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
-	strncpy(buf.name, name, sizeof(buf.name) - 1);
-	buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
-	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
+	ADD_NAME_MATCH(env->conn, 0, KDBUS_MATCH_ID_ANY, KDBUS_MATCH_ID_ANY, REMOVE, name);
+
+	/* no accidental notifications when no match set up */
+	ASSERT_ZERO(kdbus_test_match_name_remove_(env, name, NULL));
+	ASSERT_NO_PENDING(listener);
+
+	#define CHECK(ID,NAME,CONN_IF_WILL_MATCH) do {\
+		ADD_NAME_MATCH(listener, KDBUS_MATCH_REPLACE, (ID), KDBUS_MATCH_ID_ANY, REMOVE, NAME);\
+		ASSERT_ZERO(kdbus_test_match_name_remove_(env, name, (CONN_IF_WILL_MATCH)));\
+		ASSERT_NO_PENDING(listener);\
+	} while (0)
+		CHECK(KDBUS_MATCH_ID_ANY, UNMATCHED_NAME, NULL); /* wrong name */
+		CHECK(KDBUS_MATCH_ID_ANY, NULL, listener); /* wildcard name */
+		CHECK(env->conn->id, NULL, listener); /* wildcard name + good id */
+		CHECK(env->conn->id + 1, NULL, NULL); /* wildcard name + bad id */
+	#undef CHECK
+	kdbus_conn_free(listener);
 
-	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-	ASSERT_RETURN(ret == 0);
+	return 0;
+}
 
-	/* create a 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+static wur int kdbus_test_match_name_change_(struct kdbus_test_env *env, struct kdbus_conn *conn, char const *name, struct kdbus_conn *listener)
+{
+	uint64_t flags;
+
+	/* acquire the name */
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, NULL));
 
 	/* allow the new connection to own the same name */
 	/* queue the 2nd connection as waiting owner */
 	flags = KDBUS_NAME_QUEUE;
-	ret = kdbus_name_acquire(conn, name, &flags);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(flags & KDBUS_NAME_IN_QUEUE);
+	ASSERT_ZERO(kdbus_name_acquire(conn, name, &flags));
+	ASSERT_NONZERO(flags & KDBUS_NAME_IN_QUEUE);
 
 	/* release name from 1st connection */
-	ret = kdbus_name_release(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_release(env->conn, name));
 
 	/* we should have received a notification */
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	#define CHECK(CONN) ASSERT_SINGLE_MATCH((CONN), env->conn->id, conn->id, CHANGE, name)
+		CHECK(env->conn);
+		if (listener)
+			CHECK(listener);
+	#undef CHECK
+
+	ASSERT_ZERO(kdbus_name_release(conn, name));
+
+	return 0;
+}
+
+wur int kdbus_test_match_name_change(struct kdbus_test_env *env)
+{
+	struct kdbus_conn *listener, *conn;
+	char const *name = "foo.bla.baz";
+
+	/* create a 2nd connection */
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	ASSERT_NONZERO(listener = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	ADD_NAME_MATCH(env->conn, 0, KDBUS_MATCH_ID_ANY, KDBUS_MATCH_ID_ANY, CHANGE, name);
+
+	/* no accidental notifications when no match set up */
+	ASSERT_ZERO(kdbus_test_match_name_change_(env, conn, name, NULL));
+	ASSERT_NO_PENDING(listener);
+
+	#define CHECK(OLD_ID,NEW_ID,NAME,CONN_IF_WILL_MATCH) do {\
+		ADD_NAME_MATCH(listener, KDBUS_MATCH_REPLACE, (OLD_ID), (NEW_ID), CHANGE, NAME);\
+		ASSERT_ZERO(kdbus_test_match_name_change_(env, conn, name, (CONN_IF_WILL_MATCH)));\
+		ASSERT_NO_PENDING(listener);\
+	} while (0)
+		CHECK(KDBUS_MATCH_ID_ANY, KDBUS_MATCH_ID_ANY, UNMATCHED_NAME, NULL); /* wrong name */
+		CHECK(KDBUS_MATCH_ID_ANY, KDBUS_MATCH_ID_ANY, NULL, listener); /* wildcard name */
+
+		CHECK(env->conn->id, KDBUS_MATCH_ID_ANY, NULL, listener); /* wildcard name + good id */
+		CHECK(env->conn->id + 1, KDBUS_MATCH_ID_ANY, NULL, NULL); /* wildcard name + bad id */
+
+		CHECK(KDBUS_MATCH_ID_ANY, conn->id, NULL, listener); /* good id */
+		CHECK(KDBUS_MATCH_ID_ANY, conn->id + 1, NULL, NULL); /* bad id */
 
-	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_CHANGE);
-	ASSERT_RETURN(msg->items[0].name_change.old_id.id == env->conn->id);
-	ASSERT_RETURN(msg->items[0].name_change.new_id.id == conn->id);
-	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
+		CHECK(env->conn->id, conn->id, NULL, listener); /* wildcard name + good id */
 
+		CHECK(env->conn->id + 1, conn->id, NULL, NULL); /* wildcard name + bad id */
+		CHECK(env->conn->id, conn->id + 1, NULL, NULL); /* wildcard name + bad id */
+	#undef CHECK
+	kdbus_conn_free(listener);
+	ASSERT_NO_PENDING(conn);
 	kdbus_conn_free(conn);
 
-	return TEST_OK;
+	return 0;
 }
 
-static int send_bloom_filter(const struct kdbus_conn *conn,
+static wur int send_bloom_filter(const struct kdbus_conn *conn,
 			     uint64_t cookie,
 			     const uint8_t *filter,
 			     size_t filter_size,
@@ -353,7 +370,7 @@ static int send_bloom_filter(const struct kdbus_conn *conn,
 	return 0;
 }
 
-int kdbus_test_match_bloom(struct kdbus_test_env *env)
+wur int kdbus_test_match_bloom(struct kdbus_test_env *env)
 {
 	struct {
 		struct kdbus_cmd_match cmd;
@@ -368,7 +385,6 @@ int kdbus_test_match_bloom(struct kdbus_test_env *env)
 	struct kdbus_msg *msg;
 	uint64_t cookie = 0xf000f00f;
 	uint8_t filter[64];
-	int ret;
 
 	/* install the match rule */
 	memset(&buf, 0, sizeof(buf));
@@ -382,60 +398,183 @@ int kdbus_test_match_bloom(struct kdbus_test_env *env)
 	buf.item.data_gen1[1] = 0xaa;
 	buf.item.data_gen1[9] = 0x02;
 
-	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_match_add(env->conn->fd, &buf.cmd));
 
 	/* create a 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* a message with a 0'ed out filter must not reach the other peer */
 	memset(filter, 0, sizeof(filter));
-	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0));
 
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(env->conn, &msg, NULL));
 
 	/* now set the filter to the connection's mask and expect success */
 	filter[0] = 0x55;
 	filter[63] = 0x80;
-	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0));
 
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	/* broaden the filter and try again. this should also succeed. */
 	filter[0] = 0xff;
 	filter[8] = 0xff;
 	filter[63] = 0xff;
-	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0));
 
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	/* the same filter must not match against bloom generation 1 */
-	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 1));
 
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(env->conn, &msg, NULL));
 
 	/* set a different filter and try again */
 	filter[1] = 0xaa;
 	filter[9] = 0x02;
-	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 1));
 
-	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_conn_free(conn);
 
 	return TEST_OK;
 }
+
+static wur int has_all_names(struct kdbus_item *item, unsigned size)
+{
+	char seen[256];
+	int left = sizeof(seen);
+	memset(seen, 0, sizeof(seen));
+
+	while (size && left) {
+		uint64_t item_size = KDBUS_ALIGN8(item->size);
+		if (item_size > size)
+			return -1;
+		if (KDBUS_ITEM_OWNED_NAME == item->type) {
+			int i;
+			ASSERT_RETURN(255u,==,strlen(item->name.name));
+			ASSERT_RETURN(0,==,memcmp(item->name.name, "big.n", 5));
+			for (i=5;i<252;++i)
+				ASSERT_RETURN('0',==,(int)item->name.name[i]);
+			ASSERT_RETURN('0',<=,(int)item->name.name[252]);
+			ASSERT_RETURN((int)item->name.name[252],<=,'9');
+			ASSERT_RETURN('0',<=,(int)item->name.name[253]);
+			ASSERT_RETURN((int)item->name.name[253],<=,'9');
+			ASSERT_RETURN('0',<=,(int)item->name.name[254]);
+			ASSERT_RETURN((int)item->name.name[254],<=,'9');
+			i = item->name.name[254]-'0' + 10*(item->name.name[253]-'0') + 100*(item->name.name[252]-'0');
+			ASSERT_RETURN(0,<=,i);
+			ASSERT_RETURN(i,<,256);
+			ASSERT_ZERO((int)seen[i]);
+			seen[i] = 1;
+			--left;
+		}
+		size -= (unsigned)item_size;
+		item = (typeof(item))((uintptr_t)item + (unsigned)item_size);
+	}
+
+	return left;
+}
+
+wur int kdbus_test_big_metadata(struct kdbus_test_env *env)
+{
+	uint64_t offset;
+	struct kdbus_conn *conn;
+	struct kdbus_msg *msg;
+	struct kdbus_info *info;
+	int i;
+	char buf[256];
+
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
+	for (i=256; --i>=0;) {
+		sprintf(buf, "big.n%0250d", i);
+		/*print("\nreg (%s)\n", buf);*/
+		ASSERT_ZERO(kdbus_name_acquire(conn, buf, NULL));
+	}
+
+	/*print("\nreg done\n");*/
+
+	ASSERT_ZERO(kdbus_msg_send(conn, NULL, 1, 0, 0, 0, env->conn->id));
+	/*print("\nsend done\n");*/
+	/*print("\nfree done\n");*/
+
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	/*print("\nrecv done\n");*/
+
+	ASSERT_ZERO(has_all_names(msg->items, msg->size - offsetof(typeof(*msg), items)));
+
+	kdbus_msg_free(msg);
+
+	ASSERT_ZERO(kdbus_conn_info(env->conn, conn->id, NULL, _KDBUS_ATTACH_ALL, &offset));
+	info = (struct kdbus_info *)(env->conn->buf + offset);
+	ASSERT_RETURN(info->id,==,conn->id);
+	ASSERT_ZERO(has_all_names(info->items, info->size - offsetof(typeof(*info), items)));
+
+	kdbus_conn_free(conn);
+
+	/*print("\nfree done\n");*/
+
+	return TEST_OK;
+}
+
+wur int kdbus_test_match_itemless(struct kdbus_test_env *env)
+{
+	struct kdbus_cmd_match cmd;
+	struct kdbus_conn *conn;
+	struct kdbus_msg *msg;
+	uint64_t cookie = 0xf000f00f;
+	uint8_t filter[64];
+
+	/* install the match rule */
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.size = sizeof(cmd);
+
+	ASSERT_ZERO(kdbus_cmd_match_add(env->conn->fd, &cmd));
+
+	/* create a 2nd connection */
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	/* 1st connection should have received a notification */
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_NO_PENDING(env->conn);
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_ID_ADD);
+	ASSERT_RETURN(msg->items[0].id_change.id,==,conn->id);
+
+	/* even a message with a 0'ed out filter must match */
+	memset(filter, 0, sizeof(filter));
+	ASSERT_ZERO(send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0));
+
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_NO_PENDING(env->conn);
+	ASSERT_RETURN(msg->cookie,==,cookie);
+
+	ASSERT_ZERO(kdbus_name_acquire(conn, "mein.volk", NULL));
+	/* 1st connection should have received a notification */
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_NO_PENDING(env->conn);
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_NAME_ADD);
+	ASSERT_RETURN(msg->items[0].name_change.new_id.id,==,conn->id);
+
+	ASSERT_ZERO(kdbus_name_release(conn, "mein.volk"));
+	/* 1st connection should have received a notification */
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_NO_PENDING(env->conn);
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_NAME_REMOVE);
+	ASSERT_RETURN(msg->items[0].name_change.old_id.id,==,conn->id);
+
+	kdbus_conn_free(conn);
+
+	/* 1st connection should have received a notification */
+	ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+	ASSERT_NO_PENDING(env->conn);
+	ASSERT_RETURN(msg->items[0].type,==,(typeof(msg->items[0].type))KDBUS_ITEM_ID_REMOVE);
+	ASSERT_RETURN(msg->items[0].id_change.id,==,conn->id);
+
+	ASSERT_NO_PENDING(env->conn);
+
+	return TEST_OK;
+}
diff --git a/tools/testing/selftests/kdbus/test-message.c b/tools/testing/selftests/kdbus/test-message.c
index d9b8fbddb1da..aa12118e590c 100644
--- a/tools/testing/selftests/kdbus/test-message.c
+++ b/tools/testing/selftests/kdbus/test-message.c
@@ -19,63 +19,54 @@
 #include "kdbus-test.h"
 
 /* maximum number of queued messages from the same individual user */
-#define KDBUS_CONN_MAX_MSGS			256
+#define KDBUS_CONN_MAX_MSGS			256U
 
 /* maximum number of queued requests waiting for a reply */
-#define KDBUS_CONN_MAX_REQUESTS_PENDING		128
+#define KDBUS_CONN_MAX_REQUESTS_PENDING		1024U
 
 /* maximum message payload size */
 #define KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE		(2 * 1024UL * 1024UL)
 
-int kdbus_test_message_basic(struct kdbus_test_env *env)
+wur int kdbus_test_message_basic(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn;
 	struct kdbus_conn *sender;
 	struct kdbus_msg *msg;
 	uint64_t cookie = 0x1234abcd5678eeff;
 	uint64_t offset;
-	int ret;
 
-	sender = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(sender != NULL);
+	ASSERT_NONZERO(sender = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* create a 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	ret = kdbus_add_match_empty(conn);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn));
 
-	ret = kdbus_add_match_empty(sender);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(sender));
 
 	/* send over 1st connection */
-	ret = kdbus_msg_send(sender, NULL, cookie, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(sender, NULL, cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
-	/* Make sure that we do not get our own broadcasts */
-	ret = kdbus_msg_recv(sender, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	/* Make sure that we do get our own broadcasts */
+	ASSERT_ZERO(kdbus_msg_recv(sender, &msg, &offset));
+	ASSERT_RETURN(msg->cookie,==,cookie);
+	kdbus_msg_free(msg);
 
 	/* ... and receive on the 2nd */
-	ret = kdbus_msg_recv_poll(conn, 100, &msg, &offset);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv_poll(conn, 100, &msg, &offset));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
 
 	/* Msgs that expect a reply must have timeout and cookie */
-	ret = kdbus_msg_send(sender, NULL, 0, KDBUS_MSG_EXPECT_REPLY,
-			     0, 0, conn->id, 0, NULL);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_msg_send(sender, NULL, 0, KDBUS_MSG_EXPECT_REPLY, 1000000000, 0, conn->id)); /* no cookie */
+	ASSERT_RETURN(-EINVAL,==,kdbus_msg_send(sender, NULL, 1, KDBUS_MSG_EXPECT_REPLY, 0, 0, conn->id)); /* no timeout */
+	ASSERT_RETURN(-EINVAL,==,kdbus_msg_send(sender, NULL, 0, KDBUS_MSG_EXPECT_REPLY, 0, 0, conn->id)); /* neither cookie nor timeout */
 
-	/* Faked replies with a valid reply cookie are rejected */
-	ret = kdbus_msg_send_reply(conn, time(NULL) ^ cookie, sender->id);
-	ASSERT_RETURN(ret == -EPERM);
+	/* Faked replies with a valid reply cookie are rejected iff not TIZEN */
+	ASSERT_RETURN(ONTIZEN(0,-EBADSLT),==,kdbus_msg_send_reply(conn, time(NULL) ^ cookie, sender->id));
 
-	ret = kdbus_free(conn, offset);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_free(conn, offset));
 
 	kdbus_conn_free(sender);
 	kdbus_conn_free(conn);
@@ -83,7 +74,7 @@ int kdbus_test_message_basic(struct kdbus_test_env *env)
 	return TEST_OK;
 }
 
-static int msg_recv_prio(struct kdbus_conn *conn,
+static wur int msg_recv_prio(struct kdbus_conn *conn,
 			 int64_t requested_prio,
 			 int64_t expected_prio)
 {
@@ -93,7 +84,7 @@ static int msg_recv_prio(struct kdbus_conn *conn,
 		.priority = requested_prio,
 	};
 	struct kdbus_msg *msg;
-	int ret;
+	int ret, dumpret;
 
 	ret = kdbus_cmd_recv(conn->fd, &recv);
 	if (ret < 0) {
@@ -102,7 +93,7 @@ static int msg_recv_prio(struct kdbus_conn *conn,
 	}
 
 	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
-	kdbus_msg_dump(conn, msg);
+	dumpret = kdbus_msg_dump(msg);
 
 	if (msg->priority != expected_prio) {
 		kdbus_printf("expected message prio %lld, got %lld\n",
@@ -115,54 +106,42 @@ static int msg_recv_prio(struct kdbus_conn *conn,
 	ret = kdbus_free(conn, recv.msg.offset);
 	if (ret < 0)
 		return ret;
+	if (dumpret)
+		return dumpret;
 
 	return 0;
 }
 
-int kdbus_test_message_prio(struct kdbus_test_env *env)
+wur int kdbus_test_message_prio(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *a, *b;
 	uint64_t cookie = 0;
-	int ret;
 
-	a = kdbus_hello(env->buspath, 0, NULL, 0);
-	b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(a && b);
-
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0,   25, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, -600, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0,   10, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -35, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, -100, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0,   20, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -15, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, -800, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, -150, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0,   10, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, -800, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -10, a->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-
-	ASSERT_RETURN(msg_recv_prio(a, -200, -800) == 0);
-	ASSERT_RETURN(msg_recv_prio(a, -100, -800) == 0);
-	ASSERT_RETURN(msg_recv_prio(a, -400, -600) == 0);
-	ASSERT_RETURN(msg_recv_prio(a, -400, -600) == -EAGAIN);
-	ASSERT_RETURN(msg_recv_prio(a, 10, -150) == 0);
-	ASSERT_RETURN(msg_recv_prio(a, 10, -100) == 0);
+	ASSERT_NONZERO(a = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(b = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   25, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -600, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   10, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -35, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -100, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   20, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -15, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -800, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -150, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   10, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -800, a->id));
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -10, a->id));
+
+	ASSERT_ZERO(msg_recv_prio(a, -200, -800));
+	ASSERT_ZERO(msg_recv_prio(a, -100, -800));
+	ASSERT_ZERO(msg_recv_prio(a, -400, -600));
+	ASSERT_RETURN(msg_recv_prio(a, -400, -600),==,-EAGAIN);
+	ASSERT_ZERO(msg_recv_prio(a, 10, -150));
+	ASSERT_ZERO(msg_recv_prio(a, 10, -100));
 
 	kdbus_printf("--- get priority (all)\n");
-	ASSERT_RETURN(kdbus_msg_recv(a, NULL, NULL) == 0);
+	ASSERT_ZERO(kdbus_msg_recv(a, NULL, NULL));
 
 	kdbus_conn_free(a);
 	kdbus_conn_free(b);
@@ -170,37 +149,26 @@ int kdbus_test_message_prio(struct kdbus_test_env *env)
 	return TEST_OK;
 }
 
-static int kdbus_test_notify_kernel_quota(struct kdbus_test_env *env)
+static wur int kdbus_test_notify_kernel_quota(struct kdbus_test_env *env)
 {
-	int ret;
 	unsigned int i;
 	struct kdbus_conn *conn;
 	struct kdbus_conn *reader;
 	struct kdbus_msg *msg = NULL;
 	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
 
-	reader = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(reader);
-
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(reader = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* Register for ID signals */
-	ret = kdbus_add_match_id(reader, 0x1, KDBUS_ITEM_ID_ADD,
-				 KDBUS_MATCH_ID_ANY);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_id(reader, 0x1, KDBUS_ITEM_ID_ADD, KDBUS_MATCH_ID_ANY));
 
-	ret = kdbus_add_match_id(reader, 0x2, KDBUS_ITEM_ID_REMOVE,
-				 KDBUS_MATCH_ID_ANY);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_id(reader, 0x2, KDBUS_ITEM_ID_REMOVE, KDBUS_MATCH_ID_ANY));
 
 	/* Each iteration two notifications: add and remove ID */
 	for (i = 0; i < KDBUS_CONN_MAX_MSGS / 2; i++) {
 		struct kdbus_conn *notifier;
-
-		notifier = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_RETURN(notifier);
-
+		ASSERT_NONZERO(notifier = kdbus_hello(env->buspath, 0, NULL, 0));
 		kdbus_conn_free(notifier);
 	}
 
@@ -208,15 +176,12 @@ static int kdbus_test_notify_kernel_quota(struct kdbus_test_env *env)
 	 * Now the reader queue is full with kernel notfications,
 	 * but as a user we still have room to push our messages.
 	 */
-	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0, 0, reader->id,
-			     0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0, 0, reader->id));
 
 	/* More ID kernel notifications that will be lost */
 	kdbus_conn_free(conn);
 
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	kdbus_conn_free(conn);
 
@@ -224,10 +189,9 @@ static int kdbus_test_notify_kernel_quota(struct kdbus_test_env *env)
 	 * We lost only 3 packets since only signal msgs are
 	 * accounted. The connection ID add/remove notification
 	 */
-	ret = kdbus_cmd_recv(reader->fd, &recv);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(recv.return_flags & KDBUS_RECV_RETURN_DROPPED_MSGS);
-	ASSERT_RETURN(recv.dropped_msgs == 3);
+	ASSERT_ZERO(kdbus_cmd_recv(reader->fd, &recv));
+	ASSERT_NONZERO(recv.return_flags & KDBUS_RECV_RETURN_DROPPED_MSGS);
+	ASSERT_RETURN(recv.dropped_msgs,==,3U);
 
 	msg = (struct kdbus_msg *)(reader->buf + recv.msg.offset);
 	kdbus_msg_free(msg);
@@ -237,20 +201,16 @@ static int kdbus_test_notify_kernel_quota(struct kdbus_test_env *env)
 		memset(&recv, 0, sizeof(recv));
 		recv.size = sizeof(recv);
 
-		ret = kdbus_cmd_recv(reader->fd, &recv);
-		ASSERT_RETURN(ret == 0);
-		ASSERT_RETURN(!(recv.return_flags &
-			        KDBUS_RECV_RETURN_DROPPED_MSGS));
+		ASSERT_ZERO(kdbus_cmd_recv(reader->fd, &recv));
+		ASSERT_ZERO(recv.return_flags & KDBUS_RECV_RETURN_DROPPED_MSGS);
 
 		msg = (struct kdbus_msg *)(reader->buf + recv.msg.offset);
 		kdbus_msg_free(msg);
 	}
 
-	ret = kdbus_msg_recv(reader, NULL, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv(reader, NULL, NULL));
 
-	ret = kdbus_msg_recv(reader, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(reader, NULL, NULL));
 
 	kdbus_conn_free(reader);
 
@@ -258,7 +218,7 @@ static int kdbus_test_notify_kernel_quota(struct kdbus_test_env *env)
 }
 
 /* Return the number of message successfully sent */
-static int kdbus_fill_conn_queue(struct kdbus_conn *conn_src,
+static wur int kdbus_fill_conn_queue(struct kdbus_conn *conn_src,
 				 uint64_t dst_id,
 				 unsigned int max_msgs)
 {
@@ -271,7 +231,7 @@ static int kdbus_fill_conn_queue(struct kdbus_conn *conn_src,
 
 	size = sizeof(struct kdbus_msg);
 	msg = malloc(size);
-	ASSERT_RETURN_VAL(msg, -ENOMEM);
+	ASSERT_RETURN_VAL(msg,!=,NULL, -ENOMEM);
 
 	memset(msg, 0, size);
 	msg->size = size;
@@ -283,10 +243,12 @@ static int kdbus_fill_conn_queue(struct kdbus_conn *conn_src,
 	cmd.msg_address = (uintptr_t)msg;
 
 	for (i = 0; i < max_msgs; i++) {
-		msg->cookie = cookie++;
+		msg->cookie = ++cookie;
 		ret = kdbus_cmd_send(conn_src->fd, &cmd);
-		if (ret < 0)
+		if (ret < 0) {
+			/*print("fill_conn_queue_senderr(%d)", ret);*/
 			break;
+		}
 	}
 
 	free(msg);
@@ -294,17 +256,15 @@ static int kdbus_fill_conn_queue(struct kdbus_conn *conn_src,
 	return i;
 }
 
-static int kdbus_test_activator_quota(struct kdbus_test_env *env)
+wur int kdbus_test_activator_quota(struct kdbus_test_env *env)
 {
-	int ret;
-	unsigned int i;
-	unsigned int activator_msgs_count = 0;
+	unsigned i, activator_msgs_count=0;
 	uint64_t cookie = time(NULL);
+	uint64_t flags = KDBUS_NAME_REPLACE_EXISTING;
 	struct kdbus_conn *conn;
 	struct kdbus_conn *sender;
 	struct kdbus_conn *activator;
 	struct kdbus_msg *msg;
-	uint64_t flags = KDBUS_NAME_REPLACE_EXISTING;
 	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
 	struct kdbus_policy_access access = {
 		.type = KDBUS_POLICY_ACCESS_USER,
@@ -312,140 +272,110 @@ static int kdbus_test_activator_quota(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	activator = kdbus_hello_activator(env->buspath, "foo.test.activator",
-					  &access, 1);
-	ASSERT_RETURN(activator);
-
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	sender = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn || sender);
-
-	ret = kdbus_list(sender, KDBUS_LIST_NAMES |
-				 KDBUS_LIST_UNIQUE |
-				 KDBUS_LIST_ACTIVATORS |
-				 KDBUS_LIST_QUEUED);
-	ASSERT_RETURN(ret == 0);
-
-	for (i = 0; i < KDBUS_CONN_MAX_MSGS; i++) {
-		ret = kdbus_msg_send(sender, "foo.test.activator",
-				     cookie++, 0, 0, 0,
-				     KDBUS_DST_ID_NAME,
-				     0, NULL);
-		if (ret < 0)
-			break;
-		activator_msgs_count++;
-	}
+	ASSERT_NONZERO(activator = kdbus_hello_activator(env->buspath, "foo.test.activator", &access, 1));
+
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(sender = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	ASSERT_ZERO(kdbus_list(sender, KDBUS_LIST_NAMES | KDBUS_LIST_UNIQUE | KDBUS_LIST_ACTIVATORS | KDBUS_LIST_QUEUED));
+
+#define EXHAUST(EXPECTERR,SENDOP) do {\
+	for (i = 0;; ++i) {\
+		int ret = (SENDOP);\
+		ASSERT_RETURN(i,<=,KDBUS_CONN_MAX_MSGS);\
+		if (0 > ret) {\
+			ASSERT_RETURN((EXPECTERR),==,ret);\
+			ASSERT_RETURN(i,<,KDBUS_CONN_MAX_MSGS);\
+			break;\
+		}\
+	}\
+} while (0)
+	EXHAUST(-ENOBUFS,kdbus_msg_send(sender, "foo.test.activator", ++cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
+	activator_msgs_count = i;
 
 	/* we must have at least sent one message */
-	ASSERT_RETURN_VAL(i > 0, -errno);
-	ASSERT_RETURN(ret == -ENOBUFS);
+	ASSERT_RETURN_VAL(i,>,0U, -errno);
 
 	/* Good, activator queue is full now */
 
 	/* ENXIO on direct send (activators can never be addressed by ID) */
-	ret = kdbus_msg_send(conn, NULL, cookie++, 0, 0, 0, activator->id,
-			     0, NULL);
-	ASSERT_RETURN(ret == -ENXIO);
+	ASSERT_RETURN(-ENXIO,==,kdbus_msg_send(conn, NULL, ++cookie, 0, 0, 0, activator->id));
 
 	/* can't queue more */
-	ret = kdbus_msg_send(conn, "foo.test.activator", cookie++,
-			     0, 0, 0, KDBUS_DST_ID_NAME, 0, NULL);
-	ASSERT_RETURN(ret == -ENOBUFS);
+	ASSERT_RETURN(-ENOBUFS,==,kdbus_msg_send(conn, "foo.test.activator", ++cookie, 0, 0, 0, KDBUS_DST_ID_NAME));
 
 	/* no match installed, so the broadcast will not inc dropped_msgs */
-	ret = kdbus_msg_send(sender, NULL, cookie++, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn, NULL, ++cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
 	/* Check activator queue */
-	ret = kdbus_cmd_recv(activator->fd, &recv);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(recv.dropped_msgs == 0);
-
-	activator_msgs_count--;
+	ASSERT_ZERO(kdbus_cmd_recv(activator->fd, &recv));
+	ASSERT_ZERO(recv.dropped_msgs);
 
 	msg = (struct kdbus_msg *)(activator->buf + recv.msg.offset);
+	ASSERT_RETURN(msg->src_id,==,sender->id);
+	ASSERT_RETURN(msg->dst_id,==,(typeof(msg->dst_id))KDBUS_DST_ID_NAME);
+	--activator_msgs_count;
 	kdbus_msg_free(msg);
 
 
 	/* Stage 1) of test check the pool memory quota */
 
 	/* Consume the connection pool memory */
-	for (i = 0; i < KDBUS_CONN_MAX_MSGS; i++) {
-		ret = kdbus_msg_send(sender, NULL,
-				     cookie++, 0, 0, 0, conn->id, 0, NULL);
-		if (ret < 0)
-			break;
-	}
+	EXHAUST(-ENOBUFS,kdbus_msg_send(conn, NULL, ++cookie, 0, 0, 0, conn->id));
 
 	/* consume one message, so later at least one can be moved */
 	memset(&recv, 0, sizeof(recv));
 	recv.size = sizeof(recv);
-	ret = kdbus_cmd_recv(conn->fd, &recv);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(recv.dropped_msgs == 0);
+	ASSERT_ZERO(kdbus_cmd_recv(conn->fd, &recv));
+	ASSERT_ZERO(recv.dropped_msgs);
 	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
 	kdbus_msg_free(msg);
 
 	/* Try to acquire the name now */
-	ret = kdbus_name_acquire(conn, "foo.test.activator", &flags);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn, "foo.test.activator", &flags));
 
 	/* try to read messages and see if we have lost some */
 	memset(&recv, 0, sizeof(recv));
 	recv.size = sizeof(recv);
-	ret = kdbus_cmd_recv(conn->fd, &recv);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(recv.dropped_msgs != 0);
+	ASSERT_ZERO(kdbus_cmd_recv(conn->fd, &recv));
+	ASSERT_NONZERO(recv.dropped_msgs);
 
 	/* number of dropped msgs < received ones (at least one was moved) */
-	ASSERT_RETURN(recv.dropped_msgs < activator_msgs_count);
+	ASSERT_RETURN(recv.dropped_msgs,<,activator_msgs_count);
 
 	/* Deduct the number of dropped msgs from the activator msgs */
 	activator_msgs_count -= recv.dropped_msgs;
 
 	msg = (struct kdbus_msg *)(activator->buf + recv.msg.offset);
 	kdbus_msg_free(msg);
-
 	/*
 	 * Release the name and hand it back to activator, now
 	 * we should have 'activator_msgs_count' msgs again in
 	 * the activator queue
 	 */
-	ret = kdbus_name_release(conn, "foo.test.activator");
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_release(conn, "foo.test.activator"));
 
 	/* make sure that we got our previous activator msgs */
-	ret = kdbus_msg_recv(activator, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->src_id == sender->id);
-
-	activator_msgs_count--;
-
+	ASSERT_ZERO(kdbus_msg_recv(activator, &msg, NULL));
+	ASSERT_RETURN(msg->src_id,==,sender->id);
+	ASSERT_RETURN(msg->dst_id,==,(typeof(msg->dst_id))KDBUS_DST_ID_NAME);
+	--activator_msgs_count;
 	kdbus_msg_free(msg);
 
 
 	/* Stage 2) of test check max message quota */
 
-	/* Empty conn queue */
-	for (i = 0; i < KDBUS_CONN_MAX_MSGS; i++) {
-		ret = kdbus_msg_recv(conn, NULL, NULL);
-		if (ret == -EAGAIN)
-			break;
-	}
-
-	/* fill queue with max msgs quota */
-	ret = kdbus_fill_conn_queue(sender, conn->id, KDBUS_CONN_MAX_MSGS);
-	ASSERT_RETURN(ret == KDBUS_CONN_MAX_MSGS);
+	/* Empty conn queue and refill it to the brink anew */
+	EXHAUST(-EAGAIN,kdbus_msg_recv(conn, NULL, NULL));
+	EXHAUST(-ENOBUFS,kdbus_msg_send(sender, NULL, ++cookie, 0, 0, 0, conn->id));
+#undef EXHAUST
 
-	/* This one is lost but it is not accounted */
-	ret = kdbus_msg_send(sender, NULL,
-			     cookie++, 0, 0, 0, conn->id, 0, NULL);
-	ASSERT_RETURN(ret == -ENOBUFS);
+	if (!activator_msgs_count)
+		ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(activator, NULL, NULL));
 
 	/* Acquire the name again */
-	ret = kdbus_name_acquire(conn, "foo.test.activator", &flags);
-	ASSERT_RETURN(ret == 0);
+	flags = KDBUS_NAME_REPLACE_EXISTING;
+	ASSERT_ZERO(kdbus_name_acquire(conn, "foo.test.activator", &flags));
 
 	memset(&recv, 0, sizeof(recv));
 	recv.size = sizeof(recv);
@@ -455,9 +385,8 @@ static int kdbus_test_activator_quota(struct kdbus_test_env *env)
 	 * the activator messages due to quota checks. Our queue is
 	 * already full.
 	 */
-	ret = kdbus_cmd_recv(conn->fd, &recv);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(recv.dropped_msgs == activator_msgs_count);
+	ASSERT_ZERO(kdbus_cmd_recv(conn->fd, &recv));
+	ASSERT_RETURN(recv.dropped_msgs,==,activator_msgs_count);
 
 	msg = (struct kdbus_msg *)(activator->buf + recv.msg.offset);
 	kdbus_msg_free(msg);
@@ -466,66 +395,114 @@ static int kdbus_test_activator_quota(struct kdbus_test_env *env)
 	kdbus_conn_free(conn);
 	kdbus_conn_free(activator);
 
+	return TEST_OK;
+}
+
+#define TIMEOUT_CONNECTION_COUNT 8
+#define TIMEOUTS_PER_CONNECTION (MIN(KDBUS_CONN_MAX_REQUESTS_PENDING,KDBUS_CONN_MAX_MSGS)/TIMEOUT_CONNECTION_COUNT)
+
+static wur int kdbus_test_expected_reply_validate_timeouts(struct kdbus_conn *conn, uint64_t first_cookie, uint64_t type)
+{
+	uint64_t cookie_reply, seqnum, monotonic_ns, realtime_ns, prev_seqnum=0, prev_monotonic_ns=0, prev_realtime_ns=0;
+	unsigned i, next_cookie[TIMEOUT_CONNECTION_COUNT];
+	memset(next_cookie, 0, sizeof(next_cookie));
+	for (i=0; i < MIN(KDBUS_CONN_MAX_REQUESTS_PENDING,KDBUS_CONN_MAX_MSGS); i++) {
+		unsigned n, r;
+		ASSERT_ZERO(timeout_msg_recv(conn, type, &cookie_reply, &seqnum, &monotonic_ns, &realtime_ns));
+		#define A(W,R) do { ASSERT_RETURN(prev_##W,R,W); prev_##W = W; } while (0);
+			A(seqnum,<)
+			A(monotonic_ns,<=)
+			A(realtime_ns,<=)
+		#undef A
+		ASSERT_RETURN(first_cookie,<=,cookie_reply);
+		cookie_reply -= first_cookie;
+		n = cookie_reply % TIMEOUT_CONNECTION_COUNT;
+		r = cookie_reply / TIMEOUT_CONNECTION_COUNT;
+		ASSERT_RETURN(r,==,next_cookie[n]);
+		++next_cookie[n];
+	}
+	ASSERT_NO_PENDING(conn);
 	return 0;
 }
 
-static int kdbus_test_expected_reply_quota(struct kdbus_test_env *env)
+static wur int kdbus_test_expected_reply_timeouts_or_quota(struct kdbus_test_env *env)
 {
-	int ret;
-	unsigned int i, n;
-	unsigned int count;
-	uint64_t cookie = 0x1234abcd5678eeff;
+	unsigned i, n;
+	uint64_t first_cookie = 0x1234abcd5678eeff;
 	struct kdbus_conn *conn;
-	struct kdbus_conn *connections[9];
+	struct kdbus_conn *connections[1+TIMEOUT_CONNECTION_COUNT];
 
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	for (i = 0; i < 9; i++) {
-		connections[i] = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_RETURN(connections[i]);
-	}
+	for (i = 0; i < 1+TIMEOUT_CONNECTION_COUNT; i++)
+		ASSERT_NONZERO(connections[i] = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	count = 0;
-	/* Send 16 messages to 8 different connections */
-	for (i = 0; i < 8; i++) {
-		for (n = 0; n < 16; n++) {
-			ret = kdbus_msg_send(conn, NULL, cookie++,
-					     KDBUS_MSG_EXPECT_REPLY,
-					     100000000ULL, 0,
-					     connections[i]->id,
-					     0, NULL);
-			if (ret < 0)
-				break;
+	_Static_assert(!(KDBUS_CONN_MAX_REQUESTS_PENDING%TIMEOUT_CONNECTION_COUNT), "KDBUS_CONN_MAX_REQUESTS_PENDING) not a multitude of TIMEOUT_CONNECTION_COUNT - quota test needs to be modified to reflect that");
 
-			count++;
+	/* Send messages to TIMEOUT_CONNECTION_COUNT different connections */
+	for (i = 0; i < TIMEOUT_CONNECTION_COUNT; i++)
+		for (n = 0; n < TIMEOUTS_PER_CONNECTION; n++) {
+			ASSERT_ZERO(kdbus_msg_send(conn, NULL, first_cookie + i + n*TIMEOUT_CONNECTION_COUNT,
+					     KDBUS_MSG_EXPECT_REPLY,
+					     200000000ULL /* 0.2s */, 0,
+					     connections[i]->id));
+			/* drain queue to avoid hitting KDBUS_CONN_MAX_MSGS */
+			ASSERT_ZERO(kdbus_msg_recv(connections[i], NULL, NULL));
 		}
-	}
 
-	/*
-	 * We should have queued at least
-	 * KDBUS_CONN_MAX_REQUESTS_PENDING method call
-	 */
-	ASSERT_RETURN(count == KDBUS_CONN_MAX_REQUESTS_PENDING);
+	sleep(1); /* just to wait and see if timeout logic somehow destabilizes the system */
+
+	ASSERT_ZERO(kdbus_test_expected_reply_validate_timeouts(conn, first_cookie, KDBUS_ITEM_REPLY_TIMEOUT));
+
+	for (i = 0; i < 1+TIMEOUT_CONNECTION_COUNT; i++)
+		kdbus_conn_free(connections[i]);
+
+	kdbus_conn_free(conn);
+
+	return 0;
+}
+
+static wur int kdbus_test_expected_reply_quota(struct kdbus_test_env *env)
+{
+	unsigned i, n;
+	uint64_t first_cookie = 0x5678eeff1234abcd;
+	struct kdbus_conn *conn;
+	struct kdbus_conn *connections[1+TIMEOUT_CONNECTION_COUNT];
+
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	for (i = 0; i < 1+TIMEOUT_CONNECTION_COUNT; i++)
+		ASSERT_NONZERO(connections[i] = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	/* Send messages to TIMEOUT_CONNECTION_COUNT different connections */
+	for (i = 0; i < TIMEOUT_CONNECTION_COUNT; i++)
+		for (n = 0; n < KDBUS_CONN_MAX_REQUESTS_PENDING/TIMEOUT_CONNECTION_COUNT; n++) {
+			ASSERT_ZERO(kdbus_msg_send(conn, NULL, first_cookie + i + n*TIMEOUT_CONNECTION_COUNT,
+					     KDBUS_MSG_EXPECT_REPLY,
+					     KDBUS_TIMEOUT_INFINITE, 0, /* massive timeout to make sure all pending replies do not timeout before quota check below */
+					     connections[i]->id));
+			/* drain queue to avoid hitting KDBUS_CONN_MAX_MSGS */
+			ASSERT_ZERO(kdbus_msg_recv(connections[i], NULL, NULL));
+		}
 
 	/*
 	 * Now try to send a message to the last connection,
 	 * if we have reached KDBUS_CONN_MAX_REQUESTS_PENDING
 	 * no further requests are allowed
 	 */
-	ret = kdbus_msg_send(conn, NULL, cookie++, KDBUS_MSG_EXPECT_REPLY,
-			     1000000000ULL, 0, connections[8]->id, 0, NULL);
-	ASSERT_RETURN(ret == -EMLINK);
+	ASSERT_RETURN(-EMLINK,==,kdbus_msg_send(conn, NULL, first_cookie + TIMEOUT_CONNECTION_COUNT*TIMEOUTS_PER_CONNECTION, KDBUS_MSG_EXPECT_REPLY, 1000000000ULL, 0, connections[TIMEOUT_CONNECTION_COUNT]->id));
 
-	for (i = 0; i < 9; i++)
+	for (i = 0; i < 1+TIMEOUT_CONNECTION_COUNT; i++)
 		kdbus_conn_free(connections[i]);
 
+	ASSERT_ZERO(kdbus_test_expected_reply_validate_timeouts(conn, first_cookie, KDBUS_ITEM_REPLY_DEAD));
+
 	kdbus_conn_free(conn);
 
 	return 0;
 }
 
-int kdbus_test_pool_quota(struct kdbus_test_env *env)
+wur int kdbus_test_pool_quota(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *a, *b, *c;
 	struct kdbus_cmd_send cmd = {};
@@ -544,18 +521,17 @@ int kdbus_test_pool_quota(struct kdbus_test_env *env)
 		return 0;
 
 	payload = calloc(KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE, sizeof(char));
-	ASSERT_RETURN_VAL(payload, -ENOMEM);
+	ASSERT_RETURN_VAL(payload,!=,NULL, -ENOMEM);
 
-	a = kdbus_hello(env->buspath, 0, NULL, 0);
-	b = kdbus_hello(env->buspath, 0, NULL, 0);
-	c = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(a && b && c);
+	ASSERT_NONZERO(a = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(b = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(c = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	size = sizeof(struct kdbus_msg);
 	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
 
 	msg = malloc(size);
-	ASSERT_RETURN_VAL(msg, -ENOMEM);
+	ASSERT_RETURN_VAL(msg,!=,NULL, -ENOMEM);
 
 	memset(msg, 0, size);
 	msg->size = size;
@@ -583,34 +559,29 @@ int kdbus_test_pool_quota(struct kdbus_test_env *env)
 		msg->cookie = cookie++;
 
 		ret = kdbus_cmd_send(a->fd, &cmd);
-		ASSERT_RETURN_VAL(ret == 0, ret);
+		ASSERT_RETURN_VAL(ret,==,0, ret);
 	}
 
 	/* Try to get more than 33% */
 	msg->cookie = cookie++;
-	ret = kdbus_cmd_send(a->fd, &cmd);
-	ASSERT_RETURN(ret == -ENOBUFS);
+	ASSERT_RETURN(-ENOBUFS,==,kdbus_cmd_send(a->fd, &cmd));
 
 	/* We still can pass small messages */
-	ret = kdbus_msg_send(b, NULL, cookie++, 0, 0, 0, c->id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(b, NULL, cookie++, 0, 0, 0, c->id));
 
 	for (i = size; i < (POOL_SIZE / 2 / 3); i += size) {
-		ret = kdbus_msg_recv(c, &recv_msg, NULL);
-		ASSERT_RETURN(ret == 0);
-		ASSERT_RETURN(recv_msg->src_id == a->id);
+		ASSERT_ZERO(kdbus_msg_recv(c, &recv_msg, NULL));
+		ASSERT_RETURN(recv_msg->src_id,==,a->id);
 
 		kdbus_msg_free(recv_msg);
 	}
 
-	ret = kdbus_msg_recv(c, &recv_msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(recv_msg->src_id == b->id);
+	ASSERT_ZERO(kdbus_msg_recv(c, &recv_msg, NULL));
+	ASSERT_RETURN(recv_msg->src_id,==,b->id);
 
 	kdbus_msg_free(recv_msg);
 
-	ret = kdbus_msg_recv(c, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(c, NULL, NULL));
 
 	free(msg);
 	free(payload);
@@ -622,47 +593,35 @@ int kdbus_test_pool_quota(struct kdbus_test_env *env)
 	return 0;
 }
 
-int kdbus_test_message_quota(struct kdbus_test_env *env)
+wur int kdbus_test_message_quota(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *a, *b;
 	uint64_t cookie = 0;
-	int ret;
-	int i;
+	unsigned i;
 
-	ret = kdbus_test_activator_quota(env);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_test_notify_kernel_quota(env));
 
-	ret = kdbus_test_notify_kernel_quota(env);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_test_pool_quota(env));
 
-	ret = kdbus_test_pool_quota(env);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_test_expected_reply_timeouts_or_quota(env));
 
-	ret = kdbus_test_expected_reply_quota(env);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_test_expected_reply_quota(env));
 
 	a = kdbus_hello(env->buspath, 0, NULL, 0);
 	b = kdbus_hello(env->buspath, 0, NULL, 0);
 
-	ret = kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS);
-	ASSERT_RETURN(ret == KDBUS_CONN_MAX_MSGS);
+	ASSERT_RETURN((typeof(kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS)))KDBUS_CONN_MAX_MSGS,==,kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS));
 
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, 0, a->id, 0, NULL);
-	ASSERT_RETURN(ret == -ENOBUFS);
+	ASSERT_RETURN(-ENOBUFS,==,kdbus_msg_send(b, NULL, ++cookie, 0, 0, 0, a->id));
 
-	for (i = 0; i < KDBUS_CONN_MAX_MSGS; ++i) {
-		ret = kdbus_msg_recv(a, NULL, NULL);
-		ASSERT_RETURN(ret == 0);
-	}
+	for (i = 0; i < KDBUS_CONN_MAX_MSGS; ++i)
+		ASSERT_ZERO(kdbus_msg_recv(a, NULL, NULL));
 
-	ret = kdbus_msg_recv(a, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(a, NULL, NULL));
 
-	ret = kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS + 1);
-	ASSERT_RETURN(ret == KDBUS_CONN_MAX_MSGS);
+	ASSERT_RETURN((typeof(kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS + 1)))KDBUS_CONN_MAX_MSGS,==,kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS + 1));
 
-	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, 0, a->id, 0, NULL);
-	ASSERT_RETURN(ret == -ENOBUFS);
+	ASSERT_RETURN(-ENOBUFS,==,kdbus_msg_send(b, NULL, ++cookie, 0, 0, 0, a->id));
 
 	kdbus_conn_free(a);
 	kdbus_conn_free(b);
@@ -670,7 +629,7 @@ int kdbus_test_message_quota(struct kdbus_test_env *env)
 	return TEST_OK;
 }
 
-int kdbus_test_memory_access(struct kdbus_test_env *env)
+wur int kdbus_test_memory_access(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *a, *b;
 	struct kdbus_cmd_send cmd = {};
@@ -680,7 +639,6 @@ int kdbus_test_memory_access(struct kdbus_test_env *env)
 	char line[256];
 	uint64_t size;
 	FILE *f;
-	int ret;
 
 	/*
 	 * Search in /proc/kallsyms for the address of a kernel symbol that
@@ -712,15 +670,14 @@ int kdbus_test_memory_access(struct kdbus_test_env *env)
 	if (!test_addr)
 		return TEST_SKIP;
 
-	a = kdbus_hello(env->buspath, 0, NULL, 0);
-	b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(a && b);
+	ASSERT_NONZERO(a = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(b = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	size = sizeof(struct kdbus_msg);
 	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
 
 	msg = alloca(size);
-	ASSERT_RETURN_VAL(msg, -ENOMEM);
+	ASSERT_RETURN_VAL(msg,!=,NULL, -ENOMEM);
 
 	memset(msg, 0, size);
 	msg->size = size;
@@ -738,8 +695,7 @@ int kdbus_test_memory_access(struct kdbus_test_env *env)
 	cmd.size = sizeof(cmd);
 	cmd.msg_address = (uintptr_t)msg;
 
-	ret = kdbus_cmd_send(a->fd, &cmd);
-	ASSERT_RETURN(ret == -EFAULT);
+	ASSERT_RETURN(-EFAULT,==,kdbus_cmd_send(a->fd, &cmd));
 
 	kdbus_conn_free(b);
 	kdbus_conn_free(a);
diff --git a/tools/testing/selftests/kdbus/test-metadata-ns.c b/tools/testing/selftests/kdbus/test-metadata-ns.c
index 395a3faabf07..6b02ba7d7c0c 100644
--- a/tools/testing/selftests/kdbus/test-metadata-ns.c
+++ b/tools/testing/selftests/kdbus/test-metadata-ns.c
@@ -55,35 +55,25 @@ static struct kdbus_item *kdbus_get_item(struct kdbus_msg *msg,
 	return NULL;
 }
 
-static int kdbus_match_kdbus_creds(struct kdbus_msg *msg,
+static wur int kdbus_match_kdbus_creds(struct kdbus_msg *msg,
 				   const struct kdbus_creds *expected_creds)
 {
 	struct kdbus_item *item;
-
-	item = kdbus_get_item(msg, KDBUS_ITEM_CREDS);
-	ASSERT_RETURN(item);
-
-	ASSERT_RETURN(memcmp(&item->creds, expected_creds,
-			     sizeof(struct kdbus_creds)) == 0);
-
+	ASSERT_NONZERO(item = kdbus_get_item(msg, KDBUS_ITEM_CREDS));
+	ASSERT_ZERO(memcmp(&item->creds, expected_creds, sizeof(struct kdbus_creds)));
 	return 0;
 }
 
-static int kdbus_match_kdbus_pids(struct kdbus_msg *msg,
+static wur int kdbus_match_kdbus_pids(struct kdbus_msg *msg,
 				  const struct kdbus_pids *expected_pids)
 {
 	struct kdbus_item *item;
-
-	item = kdbus_get_item(msg, KDBUS_ITEM_PIDS);
-	ASSERT_RETURN(item);
-
-	ASSERT_RETURN(memcmp(&item->pids, expected_pids,
-			     sizeof(struct kdbus_pids)) == 0);
-
+	ASSERT_NONZERO(item = kdbus_get_item(msg, KDBUS_ITEM_PIDS));
+	ASSERT_ZERO(memcmp(&item->pids, expected_pids, sizeof(struct kdbus_pids)));
 	return 0;
 }
 
-static int __kdbus_clone_userns_test(const char *bus,
+static wur int __kdbus_clone_userns_test(const char *bus,
 				     struct kdbus_conn *conn,
 				     uint64_t grandpa_pid,
 				     int signal_fd)
@@ -100,23 +90,18 @@ static int __kdbus_clone_userns_test(const char *bus,
 		.ppid = grandpa_pid,
 	};
 
-	ret = drop_privileges(UNPRIV_UID, UNPRIV_GID);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(drop_privileges(UNPRIV_UID, UNPRIV_GID));
 
-	unpriv_conn = kdbus_hello(bus, 0, NULL, 0);
-	ASSERT_EXIT(unpriv_conn);
+	ASSERT_EXIT_NONZERO(unpriv_conn = kdbus_hello(bus, 0, NULL, 0));
 
-	ret = kdbus_add_match_empty(unpriv_conn);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(kdbus_add_match_empty(unpriv_conn));
 
 	/*
 	 * ping privileged connection from this new unprivileged
 	 * one
 	 */
 
-	ret = kdbus_msg_send(unpriv_conn, NULL, cookie, 0, 0,
-			     0, conn->id, 0, NULL);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv_conn, NULL, cookie, 0, 0, 0, conn->id));
 
 	/*
 	 * Since we just dropped privileges, the dumpable flag
@@ -130,8 +115,7 @@ static int __kdbus_clone_userns_test(const char *bus,
 	 * Using this we will be able write to /proc/$clone_child/uid_map
 	 * as uid 65534 and map the uid 65534 to 0 inside the user namespace.
 	 */
-	ret = prctl(PR_SET_DUMPABLE, SUID_DUMP_USER);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(prctl(PR_SET_DUMPABLE, SUID_DUMP_USER));
 
 	/* Make child privileged in its new userns and run tests */
 
@@ -143,20 +127,16 @@ static int __kdbus_clone_userns_test(const char *bus,
 		struct kdbus_conn *userns_conn;
 
 		/* ping connection from the new user namespace */
-		userns_conn = kdbus_hello(bus, 0, NULL, 0);
-		ASSERT_EXIT(userns_conn);
+		ASSERT_EXIT_NONZERO(userns_conn = kdbus_hello(bus, 0, NULL, 0));
 
-		ret = kdbus_add_match_empty(userns_conn);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_add_match_empty(userns_conn));
 
 		cookie++;
-		ret = kdbus_msg_send(userns_conn, NULL, cookie,
-				     0, 0, 0, conn->id, 0, NULL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_msg_send(userns_conn, NULL, cookie, 0, 0, 0, conn->id));
 
 		/* Parent did send */
-		ret = eventfd_read(signal_fd, &event_status);
-		ASSERT_RETURN(ret >= 0 && event_status == 1);
+		ASSERT_RETURN(0,<=,eventfd_read(signal_fd, &event_status));
+		ASSERT_RETURN(event_status,==,(eventfd_t)1);
 
 		/*
 		 * Receive from privileged connection
@@ -164,24 +144,19 @@ static int __kdbus_clone_userns_test(const char *bus,
 		kdbus_printf("Privileged → unprivileged/privileged "
 			     "in its userns "
 			     "(different userns and pidns):\n");
-		ret = kdbus_msg_recv_poll(userns_conn, 300, &msg, NULL);
-		ASSERT_EXIT(ret == 0);
-		ASSERT_EXIT(msg->dst_id == userns_conn->id);
+		ASSERT_EXIT_ZERO(kdbus_msg_recv_poll(userns_conn, 300, &msg, NULL));
+		ASSERT_EXIT(msg->dst_id,==,userns_conn->id);
 
-		/* Different namespaces no CAPS */
-		item = kdbus_get_item(msg, KDBUS_ITEM_CAPS);
-		ASSERT_EXIT(item == NULL);
+		ASSERT_EXIT_NONZERO(item = kdbus_get_item(msg, KDBUS_ITEM_CAPS));
 
 		/* uid/gid not mapped, so we have unpriv cached creds */
-		ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_match_kdbus_creds(msg, &unmapped_creds));
 
 		/*
 		 * Diffent pid namepsaces. This is the child pidns
 		 * so it should not see its parent kdbus_pids
 		 */
-		ret = kdbus_match_kdbus_pids(msg, &unmapped_pids);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_match_kdbus_pids(msg, &unmapped_pids));
 
 		kdbus_msg_free(msg);
 
@@ -192,24 +167,19 @@ static int __kdbus_clone_userns_test(const char *bus,
 		kdbus_printf("Privileged → unprivileged/privileged "
 			     "in its userns "
 			     "(different userns and pidns):\n");
-		ret = kdbus_msg_recv_poll(userns_conn, 300, &msg, NULL);
-		ASSERT_EXIT(ret == 0);
-		ASSERT_EXIT(msg->dst_id == KDBUS_DST_ID_BROADCAST);
+		ASSERT_EXIT_ZERO(kdbus_msg_recv_poll(userns_conn, 300, &msg, NULL));
+		ASSERT_EXIT(msg->dst_id,==,KDBUS_DST_ID_BROADCAST);
 
-		/* Different namespaces no CAPS */
-		item = kdbus_get_item(msg, KDBUS_ITEM_CAPS);
-		ASSERT_EXIT(item == NULL);
+		ASSERT_EXIT_NONZERO(item = kdbus_get_item(msg, KDBUS_ITEM_CAPS));
 
 		/* uid/gid not mapped, so we have unpriv cached creds */
-		ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_match_kdbus_creds(msg, &unmapped_creds));
 
 		/*
 		 * Diffent pid namepsaces. This is the child pidns
 		 * so it should not see its parent kdbus_pids
 		 */
-		ret = kdbus_match_kdbus_pids(msg, &unmapped_pids);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_match_kdbus_pids(msg, &unmapped_pids));
 
 		kdbus_msg_free(msg);
 
@@ -217,8 +187,7 @@ static int __kdbus_clone_userns_test(const char *bus,
 	}),
 	({
 		/* Parent setup map child uid/gid */
-		ret = userns_map_uid_gid(pid, "0 65534 1", "0 65534 1");
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(userns_map_uid_gid(pid, "0 65534 1", "0 65534 1"));
 	}),
 	({ 0; }));
 	/* Unprivileged was not able to create user namespace */
@@ -231,25 +200,21 @@ static int __kdbus_clone_userns_test(const char *bus,
 		goto out;
 	}
 
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(ret);
 
 
 	/*
 	 * Receive from privileged connection
 	 */
 	kdbus_printf("\nPrivileged → unprivileged (same namespaces):\n");
-	ret = kdbus_msg_recv_poll(unpriv_conn, 300, &msg, NULL);
-
-	ASSERT_EXIT(ret == 0);
-	ASSERT_EXIT(msg->dst_id == unpriv_conn->id);
+	ASSERT_EXIT_ZERO(kdbus_msg_recv_poll(unpriv_conn, 300, &msg, NULL));
+	ASSERT_EXIT(msg->dst_id,==,unpriv_conn->id);
 
 	/* will get the privileged creds */
-	ret = kdbus_match_kdbus_creds(msg, &privileged_creds);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(kdbus_match_kdbus_creds(msg, &privileged_creds));
 
 	/* Same pidns so will get the kdbus_pids */
-	ret = kdbus_match_kdbus_pids(msg, &parent_pids);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_match_kdbus_pids(msg, &parent_pids));
 
 	kdbus_msg_free(msg);
 
@@ -258,17 +223,13 @@ static int __kdbus_clone_userns_test(const char *bus,
 	 * Receive broadcast from privileged connection
 	 */
 	kdbus_printf("\nPrivileged → unprivileged (same namespaces):\n");
-	ret = kdbus_msg_recv_poll(unpriv_conn, 300, &msg, NULL);
-
-	ASSERT_EXIT(ret == 0);
-	ASSERT_EXIT(msg->dst_id == KDBUS_DST_ID_BROADCAST);
+	ASSERT_EXIT_ZERO(kdbus_msg_recv_poll(unpriv_conn, 300, &msg, NULL));
+	ASSERT_EXIT(msg->dst_id,==,KDBUS_DST_ID_BROADCAST);
 
 	/* will get the privileged creds */
-	ret = kdbus_match_kdbus_creds(msg, &privileged_creds);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(kdbus_match_kdbus_creds(msg, &privileged_creds));
 
-	ret = kdbus_match_kdbus_pids(msg, &parent_pids);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_match_kdbus_pids(msg, &parent_pids));
 
 	kdbus_msg_free(msg);
 
@@ -278,43 +239,39 @@ out:
 	return ret;
 }
 
-static int kdbus_clone_userns_test(const char *bus,
+static wur int kdbus_clone_userns_test(const char *bus,
 				   struct kdbus_conn *conn)
 {
-	int ret;
-	int status;
-	int efd = -1;
+	int ret, status, efd;
 	pid_t pid, ppid;
-	uint64_t unpriv_conn_id = 0;
-	uint64_t userns_conn_id = 0;
+	uint64_t unpriv_conn_id, userns_conn_id;
 	struct kdbus_msg *msg;
 	const struct kdbus_item *item;
 	struct kdbus_pids expected_pids;
-	struct kdbus_conn *monitor = NULL;
+	struct kdbus_conn *monitor;
 
 	kdbus_printf("STARTING TEST 'metadata-ns'.\n");
 
-	monitor = kdbus_hello(bus, KDBUS_HELLO_MONITOR, NULL, 0);
-	ASSERT_EXIT(monitor);
+	ASSERT_EXIT_NONZERO(monitor = kdbus_hello(bus, KDBUS_HELLO_MONITOR, NULL, 0));
 
 	/*
 	 * parent will signal to child that is in its
 	 * userns to read its queue
 	 */
 	efd = eventfd(0, EFD_CLOEXEC);
-	ASSERT_RETURN_VAL(efd >= 0, efd);
+	ASSERT_RETURN_VAL(efd,>=,0, efd);
 
 	ppid = getppid();
 
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, -errno);
+	ASSERT_RETURN_VAL(pid,>=,0, -errno);
 
 	if (pid == 0) {
 		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-		ASSERT_EXIT_VAL(ret == 0, -errno);
+		ASSERT_EXIT_VAL(ret,==,0, -errno);
 
 		ret = __kdbus_clone_userns_test(bus, conn, ppid, efd);
-		_exit(ret);
+		exit(ret);
 	}
 
 
@@ -324,14 +281,12 @@ static int kdbus_clone_userns_test(const char *bus,
 	 * Receive from the unprivileged child
 	 */
 	kdbus_printf("\nUnprivileged → privileged (same namespaces):\n");
-	ret = kdbus_msg_recv_poll(conn, 300, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(conn, 300, &msg, NULL));
 
 	unpriv_conn_id = msg->src_id;
 
 	/* Unprivileged user */
-	ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_match_kdbus_creds(msg, &unmapped_creds));
 
 	/* Set the expected creds_pids */
 	expected_pids = (struct kdbus_pids) {
@@ -339,8 +294,7 @@ static int kdbus_clone_userns_test(const char *bus,
 		.tid = pid,
 		.ppid = getpid(),
 	};
-	ret = kdbus_match_kdbus_pids(msg, &expected_pids);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_match_kdbus_pids(msg, &expected_pids));
 
 	kdbus_msg_free(msg);
 
@@ -357,36 +311,31 @@ static int kdbus_clone_userns_test(const char *bus,
 		/* perhaps unprivileged userns is not allowed */
 		goto wait;
 
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(ret);
 
 	userns_conn_id = msg->src_id;
 
-	/* We do not share the userns, os no KDBUS_ITEM_CAPS */
-	item = kdbus_get_item(msg, KDBUS_ITEM_CAPS);
-	ASSERT_RETURN(item == NULL);
+	ASSERT_NONZERO(item = kdbus_get_item(msg, KDBUS_ITEM_CAPS));
 
 	/*
 	 * Compare received items, creds must be translated into
 	 * the receiver user namespace, so the user is unprivileged
 	 */
-	ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_match_kdbus_creds(msg, &unmapped_creds));
 
 	/*
 	 * We should have the kdbus_pids since we are the parent
 	 * pidns
 	 */
-	item = kdbus_get_item(msg, KDBUS_ITEM_PIDS);
-	ASSERT_RETURN(item);
+	ASSERT_NONZERO(item = kdbus_get_item(msg, KDBUS_ITEM_PIDS));
 
-	ASSERT_RETURN(memcmp(&item->pids, &unmapped_pids,
-			     sizeof(struct kdbus_pids)) != 0);
+	ASSERT_NONZERO(memcmp(&item->pids, &unmapped_pids, sizeof(struct kdbus_pids)));
 
 	/*
 	 * Parent pid of the unprivileged/privileged in its userns
 	 * is the unprivileged child pid that was forked here.
 	 */
-	ASSERT_RETURN((uint64_t)pid == item->pids.ppid);
+	ASSERT_RETURN((uint64_t)pid,==,item->pids.ppid);
 
 	kdbus_msg_free(msg);
 
@@ -396,36 +345,29 @@ static int kdbus_clone_userns_test(const char *bus,
 	/*
 	 * Sending to unprivileged connections a unicast
 	 */
-	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0,
-			     0, unpriv_conn_id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0, 0, unpriv_conn_id));
 
 	/* signal to child that is in its userns */
-	ret = eventfd_write(efd, 1);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_ZERO(eventfd_write(efd, 1));
 
 	/*
 	 * Sending to unprivileged/privilged in its userns
 	 * connections a unicast
 	 */
-	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0,
-			     0, userns_conn_id, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0, 0, userns_conn_id));
 
 	/*
 	 * Sending to unprivileged connections a broadcast
 	 */
-	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0,
-			     0, KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
 
 wait:
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>=,0);
 
-	ASSERT_RETURN(WIFEXITED(status))
-	ASSERT_RETURN(!WEXITSTATUS(status));
+	ASSERT_NONZERO(WIFEXITED(status));
+	ASSERT_ZERO(WEXITSTATUS(status));
 
 	/* Dump monitor queue */
 	kdbus_printf("\n\nMonitor queue:\n");
@@ -439,24 +381,22 @@ wait:
 			 * Parent pidns should see all the
 			 * pids
 			 */
-			item = kdbus_get_item(msg, KDBUS_ITEM_PIDS);
-			ASSERT_RETURN(item);
-
-			ASSERT_RETURN(item->pids.pid != 0 &&
-				      item->pids.tid != 0 &&
-				      item->pids.ppid != 0);
+			ASSERT_NONZERO(item = kdbus_get_item(msg, KDBUS_ITEM_PIDS));
+			ASSERT_NONZERO(item->pids.pid);
+			ASSERT_NONZERO(item->pids.tid != 0);
+			ASSERT_NONZERO(item->pids.ppid != 0);
 		}
 
 		kdbus_msg_free(msg);
 	}
 
 	kdbus_conn_free(monitor);
-	close(efd);
+	CLOSE(efd);
 
 	return 0;
 }
 
-int kdbus_test_metadata_ns(struct kdbus_test_env *env)
+wur int kdbus_test_metadata_ns(struct kdbus_test_env *env)
 {
 	int ret;
 	struct kdbus_conn *holder, *conn;
@@ -476,31 +416,104 @@ int kdbus_test_metadata_ns(struct kdbus_test_env *env)
 		return TEST_SKIP;
 
 	ret = test_is_capable(CAP_SETUID, CAP_SETGID, CAP_SYS_ADMIN, -1);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>=,0);
 
 	/* no enough privileges, SKIP test */
 	if (!ret)
 		return TEST_SKIP;
 
-	holder = kdbus_hello_registrar(env->buspath, "com.example.metadata",
-				       &policy_access, 1,
-				       KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(holder);
+	ASSERT_NONZERO(holder = kdbus_hello_registrar(env->buspath, "com.example.metadata", &policy_access, 1, KDBUS_HELLO_POLICY_HOLDER));
 
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	ret = kdbus_add_match_empty(conn);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn));
 
-	ret = kdbus_name_acquire(conn, "com.example.metadata", NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn, "com.example.metadata", NULL));
 
-	ret = kdbus_clone_userns_test(env->buspath, conn);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_clone_userns_test(env->buspath, conn));
 
 	kdbus_conn_free(holder);
 	kdbus_conn_free(conn);
 
 	return TEST_OK;
 }
+
+#define TEST_METADATA_DECL\
+	int attach_flags_recv = _KDBUS_ATTACH_ALL;
+#define TEST_METADATA_DECL_INLOOP\
+	struct kdbus_item const *item;\
+	bool have_desc=false, have_name=false;\
+	if (attach_flags_recv & KDBUS_ATTACH_AUDIT) /* audit not generally supported - no reason to prolong the test by including it */\
+		attach_flags_recv &= ~KDBUS_ATTACH_AUDIT;
+#define TEST_METADATA(STRUCT) do {\
+	KDBUS_ITEM_FOREACH(item, (STRUCT), items) {\
+		if (KDBUS_ITEM_OWNED_NAME == item->type) {\
+			ASSERT_ZERO(have_name);\
+			have_name = true;\
+		} else if (KDBUS_ITEM_CONN_DESCRIPTION == item->type) {\
+			ASSERT_ZERO(have_desc);\
+			have_desc = true;\
+		}\
+	}\
+	if (attach_flags_recv & KDBUS_ATTACH_NAMES)\
+		ASSERT_NONZERO(have_name);\
+	else\
+		ASSERT_ZERO(have_name);\
+	if (attach_flags_recv & KDBUS_ATTACH_CONN_DESCRIPTION)\
+		ASSERT_NONZERO(have_desc);\
+	else\
+		ASSERT_ZERO(have_desc);\
+} while (0)
+
+wur int kdbus_test_metadata(struct kdbus_test_env *env)
+{
+	struct kdbus_conn *conn;
+	struct kdbus_msg *msg;
+	uint64_t cookie = 0x1234abcd5678eeff;
+
+	TEST_METADATA_DECL;
+
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_ZERO(kdbus_name_acquire(conn, "dummy.name.yeah", NULL));
+
+	do {
+		TEST_METADATA_DECL_INLOOP;
+
+		ASSERT_ZERO(kdbus_conn_update_attach_flags(env->conn, _KDBUS_ATTACH_ALL, attach_flags_recv));
+		ASSERT_ZERO(kdbus_msg_send(conn, NULL, ++cookie, 0, 0, 0, env->conn->id));
+		ASSERT_ZERO(kdbus_msg_recv(env->conn, &msg, NULL));
+
+		TEST_METADATA(msg);
+
+		kdbus_msg_free(msg);
+		ASSERT_ZERO(kdbus_free(env->conn, (uintptr_t)msg - (uintptr_t)env->conn->buf));
+	} while (--attach_flags_recv >= 0);
+
+	kdbus_conn_free(conn);
+
+	return TEST_OK;
+}
+
+wur int kdbus_test_metadata_conn_info(struct kdbus_test_env *env)
+{
+	TEST_METADATA_DECL;
+
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, "dummy.name.yeah", NULL));
+
+	do {
+		struct kdbus_info *info;
+		uint64_t offset;
+
+		TEST_METADATA_DECL_INLOOP;
+
+		ASSERT_ZERO(kdbus_conn_info(env->conn, env->conn->id, NULL, attach_flags_recv, &offset));
+		info = (struct kdbus_info *)(env->conn->buf + offset);
+		ASSERT_RETURN(info->id,==,env->conn->id);
+
+		TEST_METADATA(info);
+
+		ASSERT_ZERO(kdbus_free(env->conn, (uintptr_t)info - (uintptr_t)env->conn->buf));
+	} while (--attach_flags_recv >= 0);
+
+	return TEST_OK;
+}
diff --git a/tools/testing/selftests/kdbus/test-monitor.c b/tools/testing/selftests/kdbus/test-monitor.c
index ae87d879716c..a5918e51890d 100644
--- a/tools/testing/selftests/kdbus/test-monitor.c
+++ b/tools/testing/selftests/kdbus/test-monitor.c
@@ -22,7 +22,7 @@
 #include "kdbus-enum.h"
 #include "kdbus-test.h"
 
-int kdbus_test_monitor(struct kdbus_test_env *env)
+wur int kdbus_test_monitor(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *monitor, *conn;
 	unsigned int cookie = 0xdeadbeef;
@@ -30,148 +30,125 @@ int kdbus_test_monitor(struct kdbus_test_env *env)
 	uint64_t offset = 0;
 	int ret;
 
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* add matches to make sure the monitor do not trigger an item add or
 	 * remove on connect and disconnect, respectively.
 	 */
-	ret = kdbus_add_match_id(conn, 0x1, KDBUS_ITEM_ID_ADD,
-				 KDBUS_MATCH_ID_ANY);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_add_match_id(conn, 0x2, KDBUS_ITEM_ID_REMOVE,
-				 KDBUS_MATCH_ID_ANY);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_id(conn, 0x1, KDBUS_ITEM_ID_ADD, KDBUS_MATCH_ID_ANY));
+	ASSERT_ZERO(kdbus_add_match_id(conn, 0x2, KDBUS_ITEM_ID_REMOVE, KDBUS_MATCH_ID_ANY));
 
 	/* register a monitor */
-	monitor = kdbus_hello(env->buspath, KDBUS_HELLO_MONITOR, NULL, 0);
-	ASSERT_RETURN(monitor);
+	ASSERT_NONZERO(monitor = kdbus_hello(env->buspath, KDBUS_HELLO_MONITOR, NULL, 0));
 
 	/* make sure we did not receive a monitor connect notification */
-	ret = kdbus_msg_recv(conn, &msg, &offset);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn, &msg, &offset));
 
 	/* check that a monitor cannot acquire a name */
-	ret = kdbus_name_acquire(monitor, "foo.bar.baz", NULL);
-	ASSERT_RETURN(ret == -EOPNOTSUPP);
+	ASSERT_RETURN(-EOPNOTSUPP,==,kdbus_name_acquire(monitor, "foo.bar.baz", NULL));
 
-	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0,  0, conn->id,
-			     0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, NULL, cookie, 0, 0,  0, conn->id));
 
 	/* the recipient should have gotten the message */
-	ret = kdbus_msg_recv(conn, &msg, &offset);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv(conn, &msg, &offset));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 	kdbus_msg_free(msg);
-	kdbus_free(conn, offset);
+	ASSERT_ZERO(kdbus_free(conn, offset));
 
 	/* and so should the monitor */
-	ret = kdbus_msg_recv(monitor, &msg, &offset);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv(monitor, &msg, &offset));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
-	kdbus_free(monitor, offset);
+	ASSERT_ZERO(kdbus_free(monitor, offset));
+
+	/* make sure there are no pending messages */
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn, &msg, &offset));
 
-	/* Installing matches for monitors must fais must fail */
-	ret = kdbus_add_match_empty(monitor);
-	ASSERT_RETURN(ret == -EOPNOTSUPP);
+	/* Installing matches for monitors must fail */
+	ASSERT_RETURN(-EOPNOTSUPP,==,kdbus_add_match_empty(monitor));
 
 	cookie++;
-	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
+
+	/* make sure there are no pending messages */
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn, &msg, &offset));
 
 	/* The monitor should get the message. */
-	ret = kdbus_msg_recv_poll(monitor, 100, &msg, &offset);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv_poll(monitor, 100, &msg, &offset));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
-	kdbus_free(monitor, offset);
+	ASSERT_ZERO(kdbus_free(monitor, offset));
 
 	/*
 	 * Since we are the only monitor, update the attach flags
-	 * and tell we are not interessted in attach flags recv
+	 * and tell we are not interested in attach flags recv
 	 */
 
-	ret = kdbus_conn_update_attach_flags(monitor,
-					     _KDBUS_ATTACH_ALL,
-					     0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_attach_flags(monitor, _KDBUS_ATTACH_ALL, 0));
 
 	cookie++;
-	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
-	ret = kdbus_msg_recv_poll(monitor, 100, &msg, &offset);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	/* make sure there are no pending messages */
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn, &msg, &offset));
 
-	ret = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(monitor, 100, &msg, &offset));
+	ASSERT_RETURN(msg->cookie,==,cookie);
+
+	ASSERT_ZERO(kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP));
 
 	kdbus_msg_free(msg);
-	kdbus_free(monitor, offset);
+	ASSERT_ZERO(kdbus_free(monitor, offset));
 
 	/*
 	 * Now we are interested in KDBUS_ITEM_TIMESTAMP and
 	 * KDBUS_ITEM_CREDS
 	 */
-	ret = kdbus_conn_update_attach_flags(monitor,
-					     _KDBUS_ATTACH_ALL,
-					     KDBUS_ATTACH_TIMESTAMP |
-					     KDBUS_ATTACH_CREDS);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_attach_flags(monitor, _KDBUS_ATTACH_ALL, KDBUS_ATTACH_TIMESTAMP | KDBUS_ATTACH_CREDS));
 
 	cookie++;
-	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
+
+	/* make sure there are no pending messages */
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn, &msg, &offset));
 
-	ret = kdbus_msg_recv_poll(monitor, 100, &msg, &offset);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv_poll(monitor, 100, &msg, &offset));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
-	ret = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-	ASSERT_RETURN(ret == 1);
+	ASSERT_RETURN(1,==,kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP));
 
-	ret = kdbus_item_in_message(msg, KDBUS_ITEM_CREDS);
-	ASSERT_RETURN(ret == 1);
+	ASSERT_RETURN(1,==,kdbus_item_in_message(msg, KDBUS_ITEM_CREDS));
 
 	/* the KDBUS_ITEM_PID_COMM was not requested */
-	ret = kdbus_item_in_message(msg, KDBUS_ITEM_PID_COMM);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_item_in_message(msg, KDBUS_ITEM_PID_COMM));
 
 	kdbus_msg_free(msg);
-	kdbus_free(monitor, offset);
+	ASSERT_ZERO(kdbus_free(monitor, offset));
+
+	/* make sure there are no pending messages */
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn, &msg, &offset));
 
 	kdbus_conn_free(monitor);
 	/* make sure we did not receive a monitor disconnect notification */
-	ret = kdbus_msg_recv(conn, &msg, &offset);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(conn, &msg, &offset));
 
 	kdbus_conn_free(conn);
 
 	/* Make sure that monitor as unprivileged is not allowed */
 	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>=,0);
 
-	if (ret && all_uids_gids_are_mapped()) {
-		ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
-			monitor = kdbus_hello(env->buspath,
-					      KDBUS_HELLO_MONITOR,
-					      NULL, 0);
-			ASSERT_EXIT(!monitor && errno == EPERM);
+	if (ret && all_uids_gids_are_mapped())
+		RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
+			monitor = kdbus_hello(env->buspath, KDBUS_HELLO_MONITOR, NULL, 0);
+			ASSERT_EXIT(errno,==,EPERM);
+			ASSERT_EXIT_ZERO(monitor);
 
-			_exit(EXIT_SUCCESS);
+			exit(EXIT_SUCCESS);
 		}),
-		({ 0; }));
-		ASSERT_RETURN(ret == 0);
-	}
+		({}));
 
 	return TEST_OK;
 }
diff --git a/tools/testing/selftests/kdbus/test-names.c b/tools/testing/selftests/kdbus/test-names.c
index 66ebb47370eb..aedbac7a3b92 100644
--- a/tools/testing/selftests/kdbus/test-names.c
+++ b/tools/testing/selftests/kdbus/test-names.c
@@ -17,46 +17,72 @@
 #include "kdbus-enum.h"
 #include "kdbus-test.h"
 
-static int conn_is_name_owner(const struct kdbus_conn *conn,
-			      const char *needle)
+struct test_name {
+	const char *name;
+	__u64 owner_id;
+	__u64 flags;
+};
+
+static wur bool conn_test_names(const struct kdbus_conn *conn,
+			    const struct test_name *tests,
+			    unsigned int n_tests)
 {
-	struct kdbus_cmd_list cmd_list = { .size = sizeof(cmd_list) };
+	struct kdbus_cmd_list cmd_list = {};
 	struct kdbus_info *name, *list;
-	bool found = false;
-	int ret;
+	unsigned int i;
 
-	cmd_list.flags = KDBUS_LIST_NAMES;
+	cmd_list.size = sizeof(cmd_list);
+	cmd_list.flags = KDBUS_LIST_NAMES |
+			 KDBUS_LIST_ACTIVATORS |
+			 KDBUS_LIST_QUEUED;
 
-	ret = kdbus_cmd_list(conn->fd, &cmd_list);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_cmd_list(conn->fd, &cmd_list));
 
 	list = (struct kdbus_info *)(conn->buf + cmd_list.offset);
-	KDBUS_FOREACH(name, list, cmd_list.list_size) {
-		struct kdbus_item *item;
-		const char *n = NULL;
-
-		KDBUS_ITEM_FOREACH(item, name, items)
-			if (item->type == KDBUS_ITEM_OWNED_NAME)
-				n = item->name.name;
-
-		if (name->id == conn->id &&
-		    n && strcmp(needle, n) == 0) {
-			found = true;
-			break;
+
+	for (i = 0; i < n_tests; i++) {
+		const struct test_name *t = tests + i;
+		bool found = false;
+
+		KDBUS_FOREACH(name, list, cmd_list.list_size) {
+			struct kdbus_item *item;
+
+			KDBUS_ITEM_FOREACH(item, name, items) {
+				if (item->type != KDBUS_ITEM_OWNED_NAME ||
+				    strcmp(item->name.name, t->name) != 0)
+					continue;
+
+				if (t->owner_id == name->id &&
+				    t->flags == item->name.flags) {
+					found = true;
+					break;
+				}
+			}
 		}
+
+		if (!found)
+			return false;
 	}
 
-	ret = kdbus_free(conn, cmd_list.offset);
-	ASSERT_RETURN(ret == 0);
+	return true;
+}
 
-	return found ? 0 : -1;
+static wur bool conn_is_name_primary_owner(const struct kdbus_conn *conn,
+				       const char *needle)
+{
+	struct test_name t = {
+		.name = needle,
+		.owner_id = conn->id,
+		.flags = KDBUS_NAME_PRIMARY,
+	};
+
+	return conn_test_names(conn, &t, 1);
 }
 
-int kdbus_test_name_basic(struct kdbus_test_env *env)
+wur int kdbus_test_name_basic(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn;
 	char *name, *dot_name, *invalid_name, *wildcard_name;
-	int ret;
 
 	name = "foo.bla.blaz";
 	dot_name = ".bla.blaz";
@@ -64,129 +90,145 @@ int kdbus_test_name_basic(struct kdbus_test_env *env)
 	wildcard_name = "foo.bla.bl.*";
 
 	/* create a 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* acquire name "foo.bar.xxx" name */
-	ret = kdbus_name_acquire(conn, "foo.bar.xxx", NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn, "foo.bar.xxx", NULL));
 
 	/* Name is not valid, must fail */
-	ret = kdbus_name_acquire(env->conn, dot_name, NULL);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_name_acquire(env->conn, dot_name, NULL));
 
-	ret = kdbus_name_acquire(env->conn, invalid_name, NULL);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_name_acquire(env->conn, invalid_name, NULL));
 
-	ret = kdbus_name_acquire(env->conn, wildcard_name, NULL);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_name_acquire(env->conn, wildcard_name, NULL));
 
 	/* check that we can acquire a name */
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, NULL));
 
-	ret = conn_is_name_owner(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_RETURN(true,==,conn_is_name_primary_owner(env->conn, name));
 
 	/* ... and release it again */
-	ret = kdbus_name_release(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_release(env->conn, name));
 
-	ret = conn_is_name_owner(env->conn, name);
-	ASSERT_RETURN(ret != 0);
+	ASSERT_RETURN(false,==,conn_is_name_primary_owner(env->conn, name));
 
 	/* check that we can't release it again */
-	ret = kdbus_name_release(env->conn, name);
-	ASSERT_RETURN(ret == -ESRCH);
+	ASSERT_RETURN(-ESRCH,==,kdbus_name_release(env->conn, name));
 
 	/* check that we can't release a name that we don't own */
-	ret = kdbus_name_release(env->conn, "foo.bar.xxx");
-	ASSERT_RETURN(ret == -EADDRINUSE);
+	ASSERT_RETURN(-EADDRINUSE,==,kdbus_name_release(env->conn, "foo.bar.xxx"));
 
 	/* Name is not valid, must fail */
-	ret = kdbus_name_release(env->conn, dot_name);
-	ASSERT_RETURN(ret == -ESRCH);
+	ASSERT_RETURN(-ESRCH,==,kdbus_name_release(env->conn, dot_name));
 
-	ret = kdbus_name_release(env->conn, invalid_name);
-	ASSERT_RETURN(ret == -ESRCH);
+	ASSERT_RETURN(-ESRCH,==,kdbus_name_release(env->conn, invalid_name));
 
-	ret = kdbus_name_release(env->conn, wildcard_name);
-	ASSERT_RETURN(ret == -ESRCH);
+	ASSERT_RETURN(-ESRCH,==,kdbus_name_release(env->conn, wildcard_name));
 
 	kdbus_conn_free(conn);
 
 	return TEST_OK;
 }
 
-int kdbus_test_name_conflict(struct kdbus_test_env *env)
+wur int kdbus_test_name_conflict(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn;
 	char *name;
-	int ret;
 
 	name = "foo.bla.blaz";
 
 	/* create a 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* allow the new connection to own the same name */
 	/* acquire name from the 1st connection */
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == 0);
-
-	ret = conn_is_name_owner(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, NULL));
 
-	/* check that we can't acquire it again from the 1st connection */
-	ret = kdbus_name_acquire(env->conn, name, NULL);
-	ASSERT_RETURN(ret == -EALREADY);
+	ASSERT_RETURN(true,==,conn_is_name_primary_owner(env->conn, name));
 
 	/* check that we also can't acquire it again from the 2nd connection */
-	ret = kdbus_name_acquire(conn, name, NULL);
-	ASSERT_RETURN(ret == -EEXIST);
+	ASSERT_RETURN(-EEXIST,==,kdbus_name_acquire(conn, name, NULL));
 
 	kdbus_conn_free(conn);
 
 	return TEST_OK;
 }
 
-int kdbus_test_name_queue(struct kdbus_test_env *env)
+wur int kdbus_test_name_queue(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn;
+	struct test_name t[2];
 	const char *name;
 	uint64_t flags;
-	int ret;
 
 	name = "foo.bla.blaz";
 
-	flags = KDBUS_NAME_ALLOW_REPLACEMENT;
+	flags = 0;
 
 	/* create a 2nd connection */
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn != NULL);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* allow the new connection to own the same name */
 	/* acquire name from the 1st connection */
-	ret = kdbus_name_acquire(env->conn, name, &flags);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, &flags));
 
-	ret = conn_is_name_owner(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_RETURN(true,==,conn_is_name_primary_owner(env->conn, name));
 
 	/* queue the 2nd connection as waiting owner */
 	flags = KDBUS_NAME_QUEUE;
-	ret = kdbus_name_acquire(conn, name, &flags);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(flags & KDBUS_NAME_IN_QUEUE);
+	ASSERT_ZERO(kdbus_name_acquire(conn, name, &flags));
+	ASSERT_NONZERO(flags & KDBUS_NAME_IN_QUEUE);
+
+	t[0].name = name;
+	t[0].owner_id = env->conn->id;
+	t[0].flags = KDBUS_NAME_PRIMARY;
+	t[1].name = name;
+	t[1].owner_id = conn->id;
+	t[1].flags = KDBUS_NAME_QUEUE | KDBUS_NAME_IN_QUEUE;
+	ASSERT_RETURN(true,==,conn_test_names(conn, t, 2));
 
 	/* release name from 1st connection */
-	ret = kdbus_name_release(env->conn, name);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_release(env->conn, name));
 
 	/* now the name should be owned by the 2nd connection */
-	ret = conn_is_name_owner(conn, name);
-	ASSERT_RETURN(ret == 0);
+	t[0].name = name;
+	t[0].owner_id = conn->id;
+	t[0].flags = KDBUS_NAME_PRIMARY | KDBUS_NAME_QUEUE;
+	ASSERT_RETURN(true,==,conn_test_names(conn, t, 1));
+
+	kdbus_conn_free(conn);
+
+	return TEST_OK;
+}
+
+wur int kdbus_test_name_takeover(struct kdbus_test_env *env)
+{
+	struct kdbus_conn *conn;
+	struct test_name t;
+	const char *name;
+	uint64_t flags;
+
+	name = "foo.bla.blaz";
+
+	flags = KDBUS_NAME_ALLOW_REPLACEMENT;
+
+	/* create a 2nd connection */
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
+
+	/* acquire name for 1st connection */
+	ASSERT_ZERO(kdbus_name_acquire(env->conn, name, &flags));
+
+	t.name = name;
+	t.owner_id = env->conn->id;
+	t.flags = KDBUS_NAME_ALLOW_REPLACEMENT | KDBUS_NAME_PRIMARY;
+	ASSERT_RETURN(true,==,conn_test_names(conn, &t, 1));
+
+	/* now steal name with 2nd connection */
+	flags = KDBUS_NAME_REPLACE_EXISTING;
+	ASSERT_ZERO(kdbus_name_acquire(conn, name, &flags));
+	ASSERT_NONZERO(flags & KDBUS_NAME_ACQUIRED);
+
+	ASSERT_RETURN(true,==,conn_is_name_primary_owner(conn, name));
 
 	kdbus_conn_free(conn);
 
diff --git a/tools/testing/selftests/kdbus/test-policy-ns.c b/tools/testing/selftests/kdbus/test-policy-ns.c
index 2d70ee486e76..0a630b73d0dd 100644
--- a/tools/testing/selftests/kdbus/test-policy-ns.c
+++ b/tools/testing/selftests/kdbus/test-policy-ns.c
@@ -57,36 +57,34 @@
  */
 static struct kdbus_conn **conn_db;
 
-static void *kdbus_recv_echo(void *ptr)
+static wur void *kdbus_recv_echo(void *ptr)
 {
 	int ret;
 	struct kdbus_conn *conn = ptr;
 
-	ret = kdbus_msg_recv_poll(conn, 200, NULL, NULL);
+	ret = kdbus_msg_recv_poll(conn, 3009, NULL, NULL);
 
 	return (void *)(long)ret;
 }
 
 /* Trigger kdbus_policy_set() */
-static int kdbus_set_policy_talk(struct kdbus_conn *conn,
+static wur int kdbus_set_policy_talk(struct kdbus_conn *conn,
 				 const char *name,
 				 uid_t id, unsigned int type)
 {
-	int ret;
 	struct kdbus_policy_access access = {
 		.type = type,
 		.id = id,
 		.access = KDBUS_POLICY_TALK,
 	};
 
-	ret = kdbus_conn_update_policy(conn, name, &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn, name, &access, 1));
 
 	return TEST_OK;
 }
 
 /* return TEST_OK or TEST_ERR on failure */
-static int kdbus_register_same_activator(char *bus, const char *name,
+static wur int kdbus_register_same_activator(char *bus, const char *name,
 					 struct kdbus_conn **c)
 {
 	int ret;
@@ -95,8 +93,7 @@ static int kdbus_register_same_activator(char *bus, const char *name,
 	activator = kdbus_hello_activator(bus, name, NULL, 0);
 	if (activator) {
 		*c = activator;
-		fprintf(stderr, "--- error was able to register name twice '%s'.\n",
-			name);
+		print("--- error was able to register name twice '%s'.\n", name);
 		return TEST_ERR;
 	}
 
@@ -109,7 +106,7 @@ static int kdbus_register_same_activator(char *bus, const char *name,
 }
 
 /* return TEST_OK or TEST_ERR on failure */
-static int kdbus_register_policy_holder(char *bus, const char *name,
+static wur int kdbus_register_policy_holder(char *bus, const char *name,
 					struct kdbus_conn **conn)
 {
 	struct kdbus_conn *c;
@@ -123,9 +120,7 @@ static int kdbus_register_policy_holder(char *bus, const char *name,
 	access[1].access = KDBUS_POLICY_TALK;
 	access[1].id = geteuid();
 
-	c = kdbus_hello_registrar(bus, name, access, 2,
-				  KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(c);
+	ASSERT_NONZERO(c = kdbus_hello_registrar(bus, name, access, 2, KDBUS_HELLO_POLICY_HOLDER));
 
 	*conn = c;
 
@@ -139,7 +134,7 @@ static int kdbus_register_policy_holder(char *bus, const char *name,
  *
  * return 0 on success, negative errno on failure.
  */
-static int kdbus_recv_in_threads(const char *bus, const char *name,
+static wur int kdbus_recv_in_threads(const char *bus, const char *name,
 				 struct kdbus_conn **conn_db)
 {
 	int ret;
@@ -180,7 +175,7 @@ static int kdbus_recv_in_threads(const char *bus, const char *name,
 			break;
 
 		ret = kdbus_msg_send(conn_db[i], name, cookie++,
-				     0, 0, 0, dst_id, 0, NULL);
+				     0, 0, 0, dst_id);
 		if (ret < 0) {
 			/*
 			 * Receivers are not reading their messages,
@@ -219,7 +214,7 @@ static int kdbus_recv_in_threads(const char *bus, const char *name,
 	 * least have sent_packets set to KDBUS_CONN_MAX_MSGS_PER_USER
 	 */
 	if (pool_full) {
-		ASSERT_RETURN(lost_packets > 0);
+		ASSERT_NONZERO(lost_packets);
 
 		/*
 		 * We should at least send KDBUS_CONN_MAX_MSGS_PER_USER
@@ -227,7 +222,7 @@ static int kdbus_recv_in_threads(const char *bus, const char *name,
 		 * For every send operation we create a thread to
 		 * recv the packet, so we keep the queue clean
 		 */
-		ASSERT_RETURN(sent_packets >= KDBUS_CONN_MAX_MSGS_PER_USER);
+		ASSERT_RETURN(sent_packets,>=,(unsigned)KDBUS_CONN_MAX_MSGS_PER_USER);
 
 		/*
 		 * Set ret to zero since we only failed due to
@@ -241,18 +236,14 @@ static int kdbus_recv_in_threads(const char *bus, const char *name,
 }
 
 /* Return: TEST_OK or TEST_ERR on failure */
-static int kdbus_normal_test(const char *bus, const char *name,
+static wur int kdbus_normal_test(const char *bus, const char *name,
 			     struct kdbus_conn **conn_db)
 {
-	int ret;
-
-	ret = kdbus_recv_in_threads(bus, name, conn_db);
-	ASSERT_RETURN(ret >= 0);
-
+	ASSERT_RETURN(0,<=,kdbus_recv_in_threads(bus, name, conn_db));
 	return TEST_OK;
 }
 
-static int kdbus_fork_test_by_id(const char *bus,
+static wur int kdbus_fork_test_by_id(const char *bus,
 				 struct kdbus_conn **conn_db,
 				 int parent_status, int child_status)
 {
@@ -263,42 +254,43 @@ static int kdbus_fork_test_by_id(const char *bus,
 	uint64_t offset = 0;
 	int status = 0;
 
+	bool parent_timedout;
+	bool child_timedout;
+
+#ifdef TIZEN
+	child_status = parent_status = 0;
+#endif
+
 	/*
 	 * If the child_status is not EXIT_SUCCESS, then we expect
 	 * that sending from the child will fail, thus receiving
 	 * from parent must error with -ETIMEDOUT, and vice versa.
 	 */
-	bool parent_timedout = !!child_status;
-	bool child_timedout = !!parent_status;
+	parent_timedout = !!child_status;
+	child_timedout = !!parent_status;
 
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, pid);
+	ASSERT_RETURN_VAL(pid,>=,0, pid);
 
 	if (pid == 0) {
 		struct kdbus_conn *conn_src;
 
-		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(prctl(PR_SET_PDEATHSIG, SIGKILL));
 
-		ret = drop_privileges(65534, 65534);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(drop_privileges(65534, 65534));
 
-		conn_src = kdbus_hello(bus, 0, NULL, 0);
-		ASSERT_EXIT(conn_src);
+		ASSERT_EXIT_NONZERO(conn_src = kdbus_hello(bus, 0, NULL, 0));
 
-		ret = kdbus_add_match_empty(conn_src);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_add_match_empty(conn_src));
 
 		/*
 		 * child_status is always checked against send
 		 * operations, in case it fails always return
 		 * EXIT_FAILURE.
 		 */
-		ret = kdbus_msg_send(conn_src, NULL, cookie,
-				     0, 0, 0, conn_db[0]->id, 0, NULL);
-		ASSERT_EXIT(ret == child_status);
+		ASSERT_EXIT(child_status,==,kdbus_msg_send(conn_src, NULL, cookie, 0, 0, 0, conn_db[0]->id));
 
-		ret = kdbus_msg_recv_poll(conn_src, 100, NULL, NULL);
+		ret = kdbus_msg_recv_poll(conn_src, 1009, NULL, NULL);
 
 		kdbus_conn_free(conn_src);
 
@@ -308,12 +300,12 @@ static int kdbus_fork_test_by_id(const char *bus,
 		 * value.
 		 */
 		if (child_timedout)
-			_exit(ret == -ETIMEDOUT ? EXIT_SUCCESS : EXIT_FAILURE);
+			exit(ret == -ETIMEDOUT ? EXIT_SUCCESS : EXIT_FAILURE);
 
-		_exit(ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
+		exit(ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
 	}
 
-	ret = kdbus_msg_recv_poll(conn_db[0], 100, &msg, &offset);
+	ret = kdbus_msg_recv_poll(conn_db[0], 1009, &msg, &offset);
 	/*
 	 * If parent_timedout is set then this should fail with
 	 * -ETIMEDOUT since the child_status was set to a non
@@ -321,29 +313,27 @@ static int kdbus_fork_test_by_id(const char *bus,
 	 * that kdbus_msg_recv_poll() has succeeded.
 	 */
 	if (parent_timedout) {
-		ASSERT_RETURN_VAL(ret == -ETIMEDOUT, TEST_ERR);
+		ASSERT_RETURN_VAL(ret,==,-ETIMEDOUT, TEST_ERR);
 
 		/* timedout no need to continue, we don't have the
 		 * child connection ID, so just terminate. */
 		goto out;
-	} else {
-		ASSERT_RETURN_VAL(ret == 0, ret);
-	}
+	} else
+		ASSERT_RETURN_VAL(ret,==,0, ret);
 
-	ret = kdbus_msg_send(conn_db[0], NULL, ++cookie,
-			     0, 0, 0, msg->src_id, 0, NULL);
+	ret = kdbus_msg_send(conn_db[0], NULL, ++cookie, 0, 0, 0, msg->src_id);
 	/*
 	 * parent_status is checked against send operations,
 	 * on failures always return TEST_ERR.
 	 */
-	ASSERT_RETURN_VAL(ret == parent_status, TEST_ERR);
+	ASSERT_RETURN_VAL(ret,==,parent_status, TEST_ERR);
 
 	kdbus_msg_free(msg);
-	kdbus_free(conn_db[0], offset);
+	ASSERT_ZERO(kdbus_free(conn_db[0], offset));
 
 out:
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
 	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
 }
@@ -353,7 +343,7 @@ out:
  * we return TEST_OK only if the children return with the expected
  * 'expected_status' that is specified as an argument.
  */
-static int kdbus_fork_test(const char *bus, const char *name,
+static wur int kdbus_fork_test(const char *bus, const char *name,
 			   struct kdbus_conn **conn_db, int expected_status)
 {
 	pid_t pid;
@@ -361,29 +351,25 @@ static int kdbus_fork_test(const char *bus, const char *name,
 	int status = 0;
 
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, pid);
+	ASSERT_RETURN_VAL(pid,>=,0, pid);
 
 	if (pid == 0) {
-		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(prctl(PR_SET_PDEATHSIG, SIGKILL));
 
-		ret = drop_privileges(65534, 65534);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(drop_privileges(65534, 65534));
 
 		ret = kdbus_recv_in_threads(bus, name, conn_db);
-		_exit(ret == expected_status ? EXIT_SUCCESS : EXIT_FAILURE);
+		exit(ret == expected_status ? EXIT_SUCCESS : EXIT_FAILURE);
 	}
 
-	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(0,<=,waitpid(pid, &status, 0));
 
 	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
 }
 
 /* Return EXIT_SUCCESS, EXIT_FAILURE or negative errno */
-static int __kdbus_clone_userns_test(const char *bus,
+static wur int __kdbus_clone_userns_test(const char *bus,
 				     const char *name,
-				     struct kdbus_conn **conn_db,
 				     int expected_status)
 {
 	int efd;
@@ -393,7 +379,7 @@ static int __kdbus_clone_userns_test(const char *bus,
 	int status;
 
 	ret = drop_privileges(uid, uid);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	/*
 	 * Since we just dropped privileges, the dumpable flag was just
@@ -409,11 +395,11 @@ static int __kdbus_clone_userns_test(const char *bus,
 	 * namespace.
 	 */
 	ret = prctl(PR_SET_DUMPABLE, SUID_DUMP_USER);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	/* sync parent/child */
 	efd = eventfd(0, EFD_CLOEXEC);
-	ASSERT_RETURN_VAL(efd >= 0, efd);
+	ASSERT_RETURN_VAL(efd,>=,0, efd);
 
 	pid = syscall(__NR_clone, SIGCHLD|CLONE_NEWUSER, NULL);
 	if (pid < 0) {
@@ -440,42 +426,38 @@ static int __kdbus_clone_userns_test(const char *bus,
 		struct kdbus_conn *conn_src;
 		eventfd_t event_status = 0;
 
-		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(prctl(PR_SET_PDEATHSIG, SIGKILL));
 
-		ret = eventfd_read(efd, &event_status);
-		ASSERT_EXIT(ret >= 0 && event_status == 1);
+		ASSERT_EXIT(0,<=,eventfd_read(efd, &event_status));
+		ASSERT_EXIT(event_status,==,(eventfd_t)1);
 
 		/* ping connection from the new user namespace */
-		conn_src = kdbus_hello(bus, 0, NULL, 0);
-		ASSERT_EXIT(conn_src);
+		ASSERT_EXIT_NONZERO(conn_src = kdbus_hello(bus, 0, NULL, 0));
 
-		ret = kdbus_add_match_empty(conn_src);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_add_match_empty(conn_src));
 
-		ret = kdbus_msg_send(conn_src, name, 0xabcd1234,
-				     0, 0, 0, KDBUS_DST_ID_NAME, 0, NULL);
+		ret = kdbus_msg_send(conn_src, name, 0xabcd1234, 0, 0, 0, KDBUS_DST_ID_NAME);
 		kdbus_conn_free(conn_src);
 
-		_exit(ret == expected_status ? EXIT_SUCCESS : EXIT_FAILURE);
+		exit(ret == expected_status ? EXIT_SUCCESS : EXIT_FAILURE);
 	}
 
 	ret = userns_map_uid_gid(pid, "0 65534 1", "0 65534 1");
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	/* Tell child we are ready */
 	ret = eventfd_write(efd, 1);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
-	close(efd);
+	CLOSE(efd);
 
 	return status == EXIT_SUCCESS ? TEST_OK : TEST_ERR;
 }
 
-static int kdbus_clone_userns_test(const char *bus,
+static wur int kdbus_clone_userns_test(const char *bus,
 				   const char *name,
 				   struct kdbus_conn **conn_db,
 				   int expected_status)
@@ -485,32 +467,30 @@ static int kdbus_clone_userns_test(const char *bus,
 	int status;
 
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, -errno);
+	ASSERT_RETURN_VAL(pid,>=,0, -errno);
 
 	if (pid == 0) {
 		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
 		if (ret < 0)
-			_exit(EXIT_FAILURE);
+			exit(EXIT_FAILURE);
 
-		ret = __kdbus_clone_userns_test(bus, name, conn_db,
-						expected_status);
-		_exit(ret);
+		exit(__kdbus_clone_userns_test(bus, name, expected_status));
 	}
 
 	/*
 	 * Receive in the original (root privileged) user namespace,
 	 * must fail with -ETIMEDOUT.
 	 */
-	ret = kdbus_msg_recv_poll(conn_db[0], 100, NULL, NULL);
-	ASSERT_RETURN_VAL(ret == -ETIMEDOUT, ret);
+	ret = kdbus_msg_recv_poll(conn_db[0], 1009, NULL, NULL);
+	ASSERT_RETURN(ret,==,expected_status?-ETIMEDOUT:0);
 
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN(ret,>=,0);
 
 	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
 }
 
-int kdbus_test_policy_ns(struct kdbus_test_env *env)
+wur int kdbus_test_policy_ns(struct kdbus_test_env *env)
 {
 	int i;
 	int ret;
@@ -519,7 +499,7 @@ int kdbus_test_policy_ns(struct kdbus_test_env *env)
 	char *bus = env->buspath;
 
 	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>=,0);
 
 	/* no enough privileges, SKIP test */
 	if (!ret)
@@ -533,44 +513,29 @@ int kdbus_test_policy_ns(struct kdbus_test_env *env)
 	if (!all_uids_gids_are_mapped())
 		return TEST_SKIP;
 
-	conn_db = calloc(MAX_CONN, sizeof(struct kdbus_conn *));
-	ASSERT_RETURN(conn_db);
+	ASSERT_NONZERO(conn_db = calloc(MAX_CONN, sizeof(struct kdbus_conn *)));
 
 	memset(conn_db, 0, MAX_CONN * sizeof(struct kdbus_conn *));
 
-	conn_db[0] = kdbus_hello(bus, 0, NULL, 0);
-	ASSERT_RETURN(conn_db[0]);
+	ASSERT_NONZERO(conn_db[0] = kdbus_hello(bus, 0, NULL, 0));
 
-	ret = kdbus_add_match_empty(conn_db[0]);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn_db[0]));
 
-	ret = kdbus_fork_test_by_id(bus, conn_db, -EPERM, -EPERM);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(kdbus_fork_test_by_id(bus, conn_db, -EPERM, -EPERM));
 
-	ret = kdbus_register_policy_holder(bus, POLICY_NAME,
-					   &policy_holder);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_register_policy_holder(bus, POLICY_NAME, &policy_holder));
 
 	/* Try to register the same name with an activator */
-	ret = kdbus_register_same_activator(bus, POLICY_NAME,
-					    &activator);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_register_same_activator(bus, POLICY_NAME, &activator));
 
 	/* Acquire POLICY_NAME */
-	ret = kdbus_name_acquire(conn_db[0], POLICY_NAME, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_name_acquire(conn_db[0], POLICY_NAME, NULL));
 
-	ret = kdbus_normal_test(bus, POLICY_NAME, conn_db);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_normal_test(bus, POLICY_NAME, conn_db));
 
-	ret = kdbus_list(conn_db[0], KDBUS_LIST_NAMES |
-				     KDBUS_LIST_UNIQUE |
-				     KDBUS_LIST_ACTIVATORS |
-				     KDBUS_LIST_QUEUED);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_list(conn_db[0], KDBUS_LIST_NAMES | KDBUS_LIST_UNIQUE | KDBUS_LIST_ACTIVATORS | KDBUS_LIST_QUEUED));
 
-	ret = kdbus_fork_test(bus, POLICY_NAME, conn_db, EXIT_SUCCESS);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_fork_test(bus, POLICY_NAME, conn_db, EXIT_SUCCESS));
 
 	/*
 	 * children connections are able to talk to conn_db[0] since
@@ -581,9 +546,7 @@ int kdbus_test_policy_ns(struct kdbus_test_env *env)
 	 * -EPERM but since it is a privileged bus user the TALK is
 	 *  allowed.
 	 */
-	ret = kdbus_fork_test_by_id(bus, conn_db,
-				    EXIT_SUCCESS, EXIT_SUCCESS);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(kdbus_fork_test_by_id(bus, conn_db, EXIT_SUCCESS, EXIT_SUCCESS));
 
 	/*
 	 * Connections that can talk are perhaps being destroyed now.
@@ -592,17 +555,14 @@ int kdbus_test_policy_ns(struct kdbus_test_env *env)
 	 *
 	 * Now only connections with uid == 0 are allowed to talk.
 	 */
-	ret = kdbus_set_policy_talk(policy_holder, POLICY_NAME,
-				    geteuid(), KDBUS_POLICY_ACCESS_USER);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_set_policy_talk(policy_holder, POLICY_NAME, geteuid(), KDBUS_POLICY_ACCESS_USER));
 
 	/*
 	 * Testing connections (FORK+DROP) again:
 	 * After setting the policy re-check connections
 	 * we expect the children to fail with -EPERM
 	 */
-	ret = kdbus_fork_test(bus, POLICY_NAME, conn_db, -EPERM);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_fork_test(bus, POLICY_NAME, conn_db, ONTIZEN(0,-EPERM)));
 
 	/*
 	 * Now expect that both parent and child to fail.
@@ -613,12 +573,10 @@ int kdbus_test_policy_ns(struct kdbus_test_env *env)
 	 * Since the parent's connection will timeout when receiving
 	 * from the child, we never continue. FWIW just put -EPERM.
 	 */
-	ret = kdbus_fork_test_by_id(bus, conn_db, -EPERM, -EPERM);
-	ASSERT_EXIT(ret == 0);
+	ASSERT_EXIT_ZERO(kdbus_fork_test_by_id(bus, conn_db, -EPERM, -EPERM));
 
 	/* Check if the name can be reached in a new userns */
-	ret = kdbus_clone_userns_test(bus, POLICY_NAME, conn_db, -EPERM);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_clone_userns_test(bus, POLICY_NAME, conn_db, ONTIZEN(0,-EPERM)));
 
 	for (i = 0; i < MAX_CONN; i++)
 		kdbus_conn_free(conn_db[i]);
@@ -628,5 +586,5 @@ int kdbus_test_policy_ns(struct kdbus_test_env *env)
 
 	free(conn_db);
 
-	return ret;
+	return TEST_OK;
 }
diff --git a/tools/testing/selftests/kdbus/test-policy-priv.c b/tools/testing/selftests/kdbus/test-policy-priv.c
index 14a09c6b98d0..0d9d476732d5 100644
--- a/tools/testing/selftests/kdbus/test-policy-priv.c
+++ b/tools/testing/selftests/kdbus/test-policy-priv.c
@@ -15,32 +15,29 @@
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
 
-static int test_policy_priv_by_id(const char *bus,
+static wur int test_policy_priv_by_id(const char *bus,
 				  struct kdbus_conn *conn_dst,
-				  bool drop_second_user,
 				  int parent_status,
 				  int child_status)
 {
-	int ret = 0;
 	uint64_t expected_cookie = time(NULL) ^ 0xdeadbeef;
 
-	ASSERT_RETURN(conn_dst);
+#ifdef TIZEN
+	parent_status = child_status = 0;
+#endif
+
+	ASSERT_NONZERO(conn_dst);
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, bus, ({
-		ret = kdbus_msg_send(unpriv, NULL,
-				     expected_cookie, 0, 0, 0,
-				     conn_dst->id, 0, NULL);
-		ASSERT_EXIT(ret == child_status);
+	RUN_UNPRIVILEGED_CONN(unpriv, bus, ({
+		ASSERT_EXIT(child_status,==,kdbus_msg_send(unpriv, NULL, expected_cookie, 0, 0, 0, conn_dst->id));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_msg_recv_poll(conn_dst, 300, NULL, NULL);
-	ASSERT_RETURN(ret == parent_status);
+	ASSERT_RETURN(parent_status,==,kdbus_msg_recv_poll(conn_dst, 300, NULL, NULL));
 
 	return 0;
 }
 
-static int test_policy_priv_by_broadcast(const char *bus,
+static wur int test_policy_priv_by_broadcast(const char *bus,
 					 struct kdbus_conn *conn_dst,
 					 int drop_second_user,
 					 int parent_status,
@@ -55,6 +52,12 @@ static int test_policy_priv_by_broadcast(const char *bus,
 	struct kdbus_conn *child_2 = conn_dst;
 	uint64_t expected_cookie = time(NULL) ^ 0xdeadbeef;
 
+#ifdef TIZEN
+	child_status = 0;
+	if (DO_NOT_DROP != drop_second_user)
+		parent_status = 0;
+#endif
+
 	/* Drop to another unprivileged user other than UNPRIV_UID */
 	if (drop_second_user == DROP_OTHER_UNPRIV) {
 		second_uid = UNPRIV_UID - 1;
@@ -63,141 +66,112 @@ static int test_policy_priv_by_broadcast(const char *bus,
 
 	/* child will signal parent to send broadcast */
 	efd = eventfd(0, EFD_CLOEXEC);
-	ASSERT_RETURN_VAL(efd >= 0, efd);
+	ASSERT_RETURN_VAL(efd,>=,0, efd);
 
-	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
+	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
 		struct kdbus_conn *child;
 
-		child = kdbus_hello(bus, 0, NULL, 0);
-		ASSERT_EXIT(child);
+		ASSERT_EXIT_NONZERO(child = kdbus_hello(bus, 0, NULL, 0));
 
-		ret = kdbus_add_match_empty(child);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_add_match_empty(child));
 
 		/* signal parent */
-		ret = eventfd_write(efd, 1);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(eventfd_write(efd, 1));
 
 		/* Use a little bit high time */
-		ret = kdbus_msg_recv_poll(child, 500, &msg, NULL);
-		ASSERT_EXIT(ret == child_status);
+		ASSERT_EXIT(child_status,==,kdbus_msg_recv_poll(child, 500, &msg, NULL));
 
 		/*
 		 * If we expect the child to get the broadcast
 		 * message, then check the received cookie.
 		 */
-		if (ret == 0) {
-			ASSERT_EXIT(expected_cookie == msg->cookie);
+		if (!child_status) {
+			ASSERT_EXIT(expected_cookie,==,msg->cookie);
+			kdbus_msg_free(msg);
 		}
 
 		/* Use expected_cookie since 'msg' might be NULL */
-		ret = kdbus_msg_send(child, NULL, expected_cookie + 1,
-				     0, 0, 0, KDBUS_DST_ID_BROADCAST,
-				     0, NULL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_msg_send(child, NULL, expected_cookie + 1, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
-		kdbus_msg_free(msg);
 		kdbus_conn_free(child);
 	}),
 	({
-		if (drop_second_user == DO_NOT_DROP) {
-			ASSERT_RETURN(child_2);
-
-			ret = eventfd_read(efd, &event_status);
-			ASSERT_RETURN(ret >= 0 && event_status == 1);
+		bool got_own_broadcast = 0;
+		#define RECEIVE_FROM_PARENT() for (;;) {\
+			/* Use a little bit high time */\
+			ret = kdbus_msg_recv_poll(child_2, 1000, &msg, NULL);\
+			if (!ret && child_2->id == msg->src_id) {\
+				ASSERT_ZERO(got_own_broadcast);\
+				got_own_broadcast = 1;\
+				kdbus_msg_free(msg);\
+				continue;\
+			}\
+			ASSERT_RETURN(parent_status,==,ret);\
+			/* Check returned cookie in case we expect success. */\
+			if (!ret) {\
+				ASSERT_RETURN(msg->cookie,==,expected_cookie + 1);\
+				kdbus_msg_free(msg);\
+			}\
+			break;\
+		}
 
-			ret = kdbus_msg_send(child_2, NULL,
-					     expected_cookie, 0, 0, 0,
-					     KDBUS_DST_ID_BROADCAST,
-					     0, NULL);
-			ASSERT_RETURN(ret == 0);
+		if (drop_second_user == DO_NOT_DROP) {
+			ASSERT_NONZERO(child_2);
 
-			/* Use a little bit high time */
-			ret = kdbus_msg_recv_poll(child_2, 1000,
-						  &msg, NULL);
-			ASSERT_RETURN(ret == parent_status);
+			ASSERT_RETURN(0,<=,eventfd_read(efd, &event_status));
+			ASSERT_RETURN(event_status,==,(eventfd_t)1);
 
-			/*
-			 * Check returned cookie in case we expect
-			 * success.
-			 */
-			if (ret == 0) {
-				ASSERT_RETURN(msg->cookie ==
-					      expected_cookie + 1);
-			}
+			ASSERT_ZERO(kdbus_msg_send(child_2, NULL, expected_cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
-			kdbus_msg_free(msg);
+			RECEIVE_FROM_PARENT();
 		} else {
 			/*
 			 * Two unprivileged users will try to
 			 * communicate using broadcast.
 			 */
-			ret = RUN_UNPRIVILEGED(second_uid, second_gid, ({
-				child_2 = kdbus_hello(bus, 0, NULL, 0);
-				ASSERT_EXIT(child_2);
-
-				ret = kdbus_add_match_empty(child_2);
-				ASSERT_EXIT(ret == 0);
-
-				ret = eventfd_read(efd, &event_status);
-				ASSERT_EXIT(ret >= 0 && event_status == 1);
-
-				ret = kdbus_msg_send(child_2, NULL,
-						expected_cookie, 0, 0, 0,
-						KDBUS_DST_ID_BROADCAST,
-						0, NULL);
-				ASSERT_EXIT(ret == 0);
-
-				/* Use a little bit high time */
-				ret = kdbus_msg_recv_poll(child_2, 1000,
-							  &msg, NULL);
-				ASSERT_EXIT(ret == parent_status);
-
-				/*
-				 * Check returned cookie in case we expect
-				 * success.
-				 */
-				if (ret == 0) {
-					ASSERT_EXIT(msg->cookie ==
-						    expected_cookie + 1);
-				}
-
-				kdbus_msg_free(msg);
+			RUN_UNPRIVILEGED(second_uid, second_gid, ({
+				ASSERT_EXIT_NONZERO(child_2 = kdbus_hello(bus, 0, NULL, 0));
+
+				ASSERT_EXIT_ZERO(kdbus_add_match_empty(child_2));
+
+				ASSERT_EXIT(0,<=,eventfd_read(efd, &event_status));
+				ASSERT_EXIT(event_status,==,(eventfd_t)1);
+
+				ASSERT_EXIT_ZERO(kdbus_msg_send(child_2, NULL, expected_cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
+
+				RECEIVE_FROM_PARENT();
 				kdbus_conn_free(child_2);
 			}),
-			({ 0; }));
-			ASSERT_RETURN(ret == 0);
+			({}));
 		}
 	}));
-	ASSERT_RETURN(ret == 0);
+#undef RECEIVE_FROM_PARENT
 
-	close(efd);
+	CLOSE(efd);
 
 	return ret;
 }
 
 static void nosig(int sig)
 {
+	UNUSED(sig);
 }
 
-static int test_priv_before_policy_upload(struct kdbus_test_env *env)
+static wur int test_priv_before_policy_upload(struct kdbus_test_env *env)
 {
 	int ret = 0;
 	struct kdbus_conn *conn;
 
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/*
 	 * Make sure unprivileged bus user cannot acquire names
-	 * before registring any policy holder.
+	 * before registering any policy holder.
 	 */
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret < 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(0,ONTIZEN(==,>),kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret == 0);
 
 	/*
 	 * Make sure unprivileged bus users cannot talk by default
@@ -205,27 +179,18 @@ static int test_priv_before_policy_upload(struct kdbus_test_env *env)
 	 * this was uploaded.
 	 */
 
-	ret = test_policy_priv_by_id(env->buspath, conn, false,
-				     -ETIMEDOUT, -EPERM);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_id(env->buspath, conn, -ETIMEDOUT, -EPERM));
 
 	/* Activate matching for a privileged connection */
-	ret = kdbus_add_match_empty(conn);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn));
 
 	/*
 	 * First make sure that BROADCAST with msg flag
 	 * KDBUS_MSG_EXPECT_REPLY will fail with -ENOTUNIQ
 	 */
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, NULL, 0xdeadbeef,
-				     KDBUS_MSG_EXPECT_REPLY,
-				     5000000000ULL, 0,
-				     KDBUS_DST_ID_BROADCAST,
-				     0, NULL);
-		ASSERT_EXIT(ret == -ENOTUNIQ);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(-ENOTUNIQ,==,kdbus_msg_send(unpriv, NULL, 0xdeadbeef, KDBUS_MSG_EXPECT_REPLY, 5000000000ULL, 0, KDBUS_DST_ID_BROADCAST));
 	}));
-	ASSERT_RETURN(ret == 0);
 
 	/*
 	 * Test broadcast with a privileged connection.
@@ -243,10 +208,7 @@ static int test_priv_before_policy_upload(struct kdbus_test_env *env)
 	 * all connections it will receive those.
 	 */
 
-	ret = test_policy_priv_by_broadcast(env->buspath, conn,
-					    DO_NOT_DROP,
-					    0, -ETIMEDOUT);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, conn, DO_NOT_DROP, 0, -ETIMEDOUT));
 
 
 	/*
@@ -256,9 +218,7 @@ static int test_priv_before_policy_upload(struct kdbus_test_env *env)
 	 * Both connections should succeed.
 	 */
 
-	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-					    DROP_SAME_UNPRIV, 0, 0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, NULL, DROP_SAME_UNPRIV, 0, 0));
 
 	/*
 	 * Test broadcast with two unprivileged connections running
@@ -267,19 +227,15 @@ static int test_priv_before_policy_upload(struct kdbus_test_env *env)
 	 * Both connections will fail with -ETIMEDOUT.
 	 */
 
-	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-					    DROP_OTHER_UNPRIV,
-					    -ETIMEDOUT, -ETIMEDOUT);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, NULL, DROP_OTHER_UNPRIV, -ETIMEDOUT, -ETIMEDOUT));
 
 	kdbus_conn_free(conn);
 
 	return ret;
 }
 
-static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
+static wur int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 {
-	int ret;
 	int efd;
 	eventfd_t event_status = 0;
 	struct kdbus_msg *msg = NULL;
@@ -288,11 +244,9 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	struct kdbus_policy_access access = {};
 	uint64_t expected_cookie = time(NULL) ^ 0xdeadbeef;
 
-	owner_a = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(owner_a);
+	ASSERT_NONZERO(owner_a = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	ret = kdbus_name_acquire(owner_a, "com.example.broadcastA", NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_name_acquire(owner_a, "com.example.broadcastA", NULL));
 
 	/*
 	 * Make sure unprivileged bus users cannot talk by default
@@ -301,9 +255,7 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	 */
 
 	++expected_cookie;
-	ret = test_policy_priv_by_id(env->buspath, owner_a, false,
-				     -ETIMEDOUT, -EPERM);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_id(env->buspath, owner_a, -ETIMEDOUT, -EPERM));
 
 	/*
 	 * Make sure that privileged won't receive broadcasts unless
@@ -316,15 +268,10 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	 * registered so we fail by default), thus the unprivileged
 	 * receiver is not able to TALK to that name.
 	 */
-
-	ret = test_policy_priv_by_broadcast(env->buspath, owner_a,
-					    DO_NOT_DROP,
-					    -ETIMEDOUT, -ETIMEDOUT);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, owner_a, DO_NOT_DROP, -ETIMEDOUT, -ETIMEDOUT));
 
 	/* Activate matching for a privileged connection */
-	ret = kdbus_add_match_empty(owner_a);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(owner_a));
 
 	/*
 	 * Redo the previous test. The privileged conn owner_a is
@@ -332,19 +279,14 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	 * broadcast message now.
 	 */
 
-	ret = test_policy_priv_by_broadcast(env->buspath, owner_a,
-					    DO_NOT_DROP,
-					    0, -ETIMEDOUT);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, owner_a, DO_NOT_DROP, 0, -ETIMEDOUT));
 
 	/*
 	 * Test that broadcast between two unprivileged users running
 	 * under the same user still succeed.
 	 */
 
-	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-					    DROP_SAME_UNPRIV, 0, 0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, NULL, DROP_SAME_UNPRIV, 0, 0));
 
 	/*
 	 * Test broadcast with two unprivileged connections running
@@ -353,10 +295,7 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	 * Both connections will fail with -ETIMEDOUT.
 	 */
 
-	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-					    DROP_OTHER_UNPRIV,
-					    -ETIMEDOUT, -ETIMEDOUT);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, NULL, DROP_OTHER_UNPRIV, -ETIMEDOUT, -ETIMEDOUT));
 
 	access = (struct kdbus_policy_access){
 		.type = KDBUS_POLICY_ACCESS_USER,
@@ -364,40 +303,25 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	holder_a = kdbus_hello_registrar(env->buspath,
-					 "com.example.broadcastA",
-					 &access, 1,
-					 KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(holder_a);
-
-	holder_b = kdbus_hello_registrar(env->buspath,
-					 "com.example.broadcastB",
-					 &access, 1,
-					 KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(holder_b);
+	ASSERT_NONZERO(holder_a = kdbus_hello_registrar(env->buspath, "com.example.broadcastA", &access, 1, KDBUS_HELLO_POLICY_HOLDER));
+	ASSERT_NONZERO(holder_b = kdbus_hello_registrar(env->buspath, "com.example.broadcastB", &access, 1, KDBUS_HELLO_POLICY_HOLDER));
 
 	/* Free connections and their received messages and restart */
 	kdbus_conn_free(owner_a);
 
-	owner_a = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(owner_a);
+	ASSERT_NONZERO(owner_a = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/* Activate matching for a privileged connection */
-	ret = kdbus_add_match_empty(owner_a);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(owner_a));
 
-	ret = kdbus_name_acquire(owner_a, "com.example.broadcastA", NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_name_acquire(owner_a, "com.example.broadcastA", NULL));
 
-	owner_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(owner_b);
+	ASSERT_NONZERO(owner_b = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	ret = kdbus_name_acquire(owner_b, "com.example.broadcastB", NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_name_acquire(owner_b, "com.example.broadcastB", NULL));
 
 	/* Activate matching for a privileged connection */
-	ret = kdbus_add_match_empty(owner_b);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(owner_b));
 
 	/*
 	 * Test that even if "com.example.broadcastA" and
@@ -408,23 +332,23 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	 */
 
 	++expected_cookie;
-	ret = kdbus_msg_send(owner_a, NULL, expected_cookie, 0,
-			     0, 0, KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
-
-	ret = kdbus_msg_recv_poll(owner_b, 100, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
-	ASSERT_RETURN(msg->cookie == expected_cookie);
+	ASSERT_ZERO(kdbus_msg_send(owner_a, NULL, expected_cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_b, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,expected_cookie);
 	/* Check src ID */
-	ASSERT_RETURN(msg->src_id == owner_a->id);
-
+	ASSERT_RETURN(msg->src_id,==,owner_a->id);
 	kdbus_msg_free(msg);
 
+	/* purge self-broadcast */
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_a, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,expected_cookie);
+	/* Check src ID */
+	ASSERT_RETURN(msg->src_id,==,owner_a->id);
+
 	/* Release name "com.example.broadcastB" */
 
-	ret = kdbus_name_release(owner_b, "com.example.broadcastB");
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_name_release(owner_b, "com.example.broadcastB"));
 
 	/* KDBUS_POLICY_OWN for unprivileged connections */
 	access = (struct kdbus_policy_access){
@@ -435,10 +359,7 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 
 	/* Update the policy so unprivileged will own the name */
 
-	ret = kdbus_conn_update_policy(holder_b,
-				       "com.example.broadcastB",
-				       &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(holder_b, "com.example.broadcastB", &access, 1));
 
 	/*
 	 * Send broadcasts from an unprivileged connection that
@@ -469,72 +390,55 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 
 	++expected_cookie;
 	efd = eventfd(0, EFD_CLOEXEC);
-	ASSERT_RETURN_VAL(efd >= 0, efd);
+	ASSERT_RETURN_VAL(efd,>=,0, efd);
 
-	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
+	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
 		struct kdbus_conn *unpriv_owner;
 		struct kdbus_conn *unpriv_a, *unpriv_b;
 
-		unpriv_owner = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_EXIT(unpriv_owner);
-
-		unpriv_a = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_EXIT(unpriv_a);
+		ASSERT_EXIT_NONZERO(unpriv_owner = kdbus_hello(env->buspath, 0, NULL, 0));
+		ASSERT_EXIT_NONZERO(unpriv_a = kdbus_hello(env->buspath, 0, NULL, 0));
+		ASSERT_EXIT_NONZERO(unpriv_b = kdbus_hello(env->buspath, 0, NULL, 0));
 
-		unpriv_b = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_EXIT(unpriv_b);
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(unpriv_owner, "com.example.broadcastB", NULL));
 
-		ret = kdbus_name_acquire(unpriv_owner,
-					 "com.example.broadcastB",
-					 NULL);
-		ASSERT_EXIT(ret >= 0);
-
-		ret = kdbus_add_match_empty(unpriv_a);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_add_match_empty(unpriv_a));
 
 		/* Signal that we are doing broadcasts */
-		ret = eventfd_write(efd, 1);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(eventfd_write(efd, 1));
 
 		/*
 		 * Do broadcast from a connection that owns the
 		 * names "com.example.broadcastB".
 		 */
-		ret = kdbus_msg_send(unpriv_owner, NULL,
-				     expected_cookie,
-				     0, 0, 0,
-				     KDBUS_DST_ID_BROADCAST,
-				     0, NULL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv_owner, NULL, expected_cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
 		/*
 		 * Unprivileged connection running under the same
 		 * user. It should succeed.
 		 */
-		ret = kdbus_msg_recv_poll(unpriv_a, 300, &msg, NULL);
-		ASSERT_EXIT(ret == 0 && msg->cookie == expected_cookie);
+		ASSERT_EXIT_ZERO(kdbus_msg_recv_poll(unpriv_a, 300, &msg, NULL));
+		ASSERT_EXIT(msg->cookie,==,expected_cookie);
 
 		/*
 		 * Did not install matches, not interested in
 		 * broadcasts
 		 */
-		ret = kdbus_msg_recv_poll(unpriv_b, 300, NULL, NULL);
-		ASSERT_EXIT(ret == -ETIMEDOUT);
+		ASSERT_EXIT(-ETIMEDOUT,==,kdbus_msg_recv_poll(unpriv_b, 300, NULL, NULL));
 	}),
 	({
-		ret = eventfd_read(efd, &event_status);
-		ASSERT_RETURN(ret >= 0 && event_status == 1);
+		ASSERT_RETURN(0,<=,eventfd_read(efd, &event_status));
+		ASSERT_RETURN(event_status,==,(eventfd_t)1);
 
 		/*
 		 * owner_a must fail with -ETIMEDOUT, since it owns
 		 * name "com.example.broadcastA" and its TALK
 		 * access is restriced.
 		 */
-		ret = kdbus_msg_recv_poll(owner_a, 300, &msg, NULL);
-		ASSERT_RETURN(ret == 0);
+		ASSERT_ZERO(kdbus_msg_recv_poll(owner_a, 300, &msg, NULL));
 
 		/* confirm the received cookie */
-		ASSERT_RETURN(msg->cookie == expected_cookie);
+		ASSERT_RETURN(msg->cookie,==,expected_cookie);
 
 		kdbus_msg_free(msg);
 
@@ -542,18 +446,16 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 		 * owner_b got the broadcast from an unprivileged
 		 * connection.
 		 */
-		ret = kdbus_msg_recv_poll(owner_b, 300, &msg, NULL);
-		ASSERT_RETURN(ret == 0);
+		ASSERT_ZERO(kdbus_msg_recv_poll(owner_b, 300, &msg, NULL));
 
 		/* confirm the received cookie */
-		ASSERT_RETURN(msg->cookie == expected_cookie);
+		ASSERT_RETURN(msg->cookie,==,expected_cookie);
 
 		kdbus_msg_free(msg);
 
 	}));
-	ASSERT_RETURN(ret == 0);
 
-	close(efd);
+	CLOSE(efd);
 
 	/*
 	 * Test broadcast with two unprivileged connections running
@@ -562,25 +464,18 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	 * Both connections will fail with -ETIMEDOUT.
 	 */
 
-	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-					    DROP_OTHER_UNPRIV,
-					    -ETIMEDOUT, -ETIMEDOUT);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, NULL, DROP_OTHER_UNPRIV, -ETIMEDOUT, -ETIMEDOUT));
 
 	/* Drop received broadcasts by privileged */
-	ret = kdbus_msg_recv_poll(owner_a, 100, NULL, NULL);
-	ret = kdbus_msg_recv_poll(owner_a, 100, NULL, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_a, 100, NULL, NULL));
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_a, 100, NULL, NULL));
 
-	ret = kdbus_msg_recv(owner_a, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(owner_a, NULL, NULL));
 
-	ret = kdbus_msg_recv_poll(owner_b, 100, NULL, NULL);
-	ret = kdbus_msg_recv_poll(owner_b, 100, NULL, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_b, 100, NULL, NULL));
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_b, 100, NULL, NULL));
 
-	ret = kdbus_msg_recv(owner_b, NULL, NULL);
-	ASSERT_RETURN(ret == -EAGAIN);
+	ASSERT_RETURN(-EAGAIN,==,kdbus_msg_recv(owner_b, NULL, NULL));
 
 	/*
 	 * Perform last tests, allow others to talk to name
@@ -595,36 +490,25 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_TALK,
 	};
 
-	ret = kdbus_conn_update_policy(holder_a,
-				       "com.example.broadcastA",
-				       &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(holder_a, "com.example.broadcastA", &access, 1));
 
 	/*
 	 * Unprivileged is able to TALK to "com.example.broadcastA"
 	 * now so it will receive its broadcasts
 	 */
-	ret = test_policy_priv_by_broadcast(env->buspath, owner_a,
-					    DO_NOT_DROP, 0, 0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_policy_priv_by_broadcast(env->buspath, owner_a, DO_NOT_DROP, 0, 0));
 
 	++expected_cookie;
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.broadcastB",
-					 NULL);
-		ASSERT_EXIT(ret >= 0);
-		ret = kdbus_msg_send(unpriv, NULL, expected_cookie,
-				     0, 0, 0, KDBUS_DST_ID_BROADCAST, 0, NULL);
-		ASSERT_EXIT(ret == 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(unpriv, "com.example.broadcastB", NULL));
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, NULL, expected_cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 	}));
-	ASSERT_RETURN(ret == 0);
 
 	/* owner_a is privileged it will get the broadcast now. */
-	ret = kdbus_msg_recv_poll(owner_a, 300, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_a, 300, &msg, NULL));
 
 	/* confirm the received cookie */
-	ASSERT_RETURN(msg->cookie == expected_cookie);
+	ASSERT_RETURN(msg->cookie,==,expected_cookie);
 
 	kdbus_msg_free(msg);
 
@@ -637,26 +521,19 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	 * signal to the privileged connection.
 	 */
 
-	ret = kdbus_name_release(owner_a, "com.example.broadcastA");
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_name_release(owner_a, "com.example.broadcastA"));
 
 	++expected_cookie;
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.broadcastB",
-					 NULL);
-		ASSERT_EXIT(ret >= 0);
-		ret = kdbus_msg_send(unpriv, NULL, expected_cookie,
-				     0, 0, 0, KDBUS_DST_ID_BROADCAST, 0, NULL);
-		ASSERT_EXIT(ret == 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(unpriv, "com.example.broadcastB", NULL));
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, NULL, expected_cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 	}));
-	ASSERT_RETURN(ret == 0);
 
 	/* owner_a will get the broadcast now. */
-	ret = kdbus_msg_recv_poll(owner_a, 300, &msg, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_recv_poll(owner_a, 300, &msg, NULL));
 
 	/* confirm the received cookie */
-	ASSERT_RETURN(msg->cookie == expected_cookie);
+	ASSERT_RETURN(msg->cookie,==,expected_cookie);
 
 	kdbus_msg_free(msg);
 
@@ -668,7 +545,7 @@ static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
 	return 0;
 }
 
-static int test_policy_priv(struct kdbus_test_env *env)
+static wur int test_policy_priv(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn_a, *conn_b, *conn, *owner;
 	struct kdbus_policy_access access, *acc;
@@ -681,7 +558,7 @@ static int test_policy_priv(struct kdbus_test_env *env)
 	 */
 
 	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_RETURN(ret,>=,0);
 
 	if (!ret)
 		return TEST_SKIP;
@@ -701,8 +578,7 @@ static int test_policy_priv(struct kdbus_test_env *env)
 	sigaddset(&sset, SIGUSR1);
 	sigprocmask(SIG_BLOCK, &sset, NULL);
 
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	/*
 	 * Before registering any policy holder, make sure that the
@@ -710,43 +586,36 @@ static int test_policy_priv(struct kdbus_test_env *env)
 	 * several cases where old D-Bus was vulnerable.
 	 */
 
-	ret = test_priv_before_policy_upload(env);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_priv_before_policy_upload(env));
 
 	/*
 	 * Make sure unprivileged are not able to register policy
 	 * holders
 	 */
 
-	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
+	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
 		struct kdbus_conn *holder;
 
 		holder = kdbus_hello_registrar(env->buspath,
 					       "com.example.a", NULL, 0,
 					       KDBUS_HELLO_POLICY_HOLDER);
-		ASSERT_EXIT(holder == NULL && errno == EPERM);
+		ASSERT_EXIT(errno,==,EPERM);
+		ASSERT_ZERO(holder);
 	}),
-	({ 0; }));
-	ASSERT_RETURN(ret == 0);
+	({}));
 
 
 	/* Register policy holder */
 
-	conn_a = kdbus_hello_registrar(env->buspath, "com.example.a",
-				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(conn_a);
-
-	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_b);
+	ASSERT_NONZERO(conn_a = kdbus_hello_registrar(env->buspath, "com.example.a", NULL, 0, KDBUS_HELLO_POLICY_HOLDER));
+	ASSERT_NONZERO(conn_b = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	ret = kdbus_name_acquire(conn_b, "com.example.b", NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_name_acquire(conn_b, "com.example.b", NULL));
 
 	/*
 	 * Make sure bus-owners can always acquire names.
 	 */
-	ret = kdbus_name_acquire(conn, "com.example.a", NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_name_acquire(conn, "com.example.a", NULL));
 
 	kdbus_conn_free(conn);
 
@@ -755,11 +624,9 @@ static int test_policy_priv(struct kdbus_test_env *env)
 	 * policy assigned.
 	 */
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret < 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(0,ONTIZEN(==,!=),kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged users can acquire names if we make them
@@ -777,21 +644,15 @@ static int test_policy_priv(struct kdbus_test_env *env)
 	 * to update policies
 	 */
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_conn_update_policy(unpriv, "com.example.a",
-					       &access, 1);
-		ASSERT_EXIT(ret == -EOPNOTSUPP);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(-EOPNOTSUPP,==,kdbus_conn_update_policy(unpriv, "com.example.a", &access, 1));
 	}));
-	ASSERT_RETURN(ret == 0);
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged users can acquire names if we make them
@@ -804,14 +665,11 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	access = (struct kdbus_policy_access){
 		.type = KDBUS_POLICY_ACCESS_GROUP,
@@ -819,14 +677,11 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret < 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(0,ONTIZEN(==,!=),kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged users can acquire names if we make them
@@ -839,14 +694,11 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	access = (struct kdbus_policy_access){
 		.type = KDBUS_POLICY_ACCESS_USER,
@@ -854,14 +706,11 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret < 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(0,ONTIZEN(==,!=),kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged users cannot acquire names if no owner-policy
@@ -892,14 +741,11 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		},
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", acc, num);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", acc, num));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret < 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(0,ONTIZEN(==,!=),kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged users can acquire names if the only matching
@@ -935,35 +781,27 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		},
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", acc, num);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", acc, num));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(unpriv, "com.example.a", NULL));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Clear policies
 	 */
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", NULL, 0);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", NULL, 0));
 
 	/*
 	 * Make sure privileged bus users can _always_ talk to others.
 	 */
 
-	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	ret = kdbus_msg_send(conn, "com.example.b", 0xdeadbeef, 0, 0, 0, 0,
-			     0, NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT_ZERO(kdbus_msg_send(conn, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 
-	ret = kdbus_msg_recv_poll(conn_b, 300, NULL, NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(conn_b, 300, NULL, NULL));
 
 	kdbus_conn_free(conn);
 
@@ -971,12 +809,9 @@ static int test_policy_priv(struct kdbus_test_env *env)
 	 * Make sure unprivileged bus users cannot talk by default.
 	 */
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret == -EPERM);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(ONTIZEN(0,-EPERM),==,kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged bus users can talk to equals, even without
@@ -989,27 +824,20 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.c", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.c", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
 		struct kdbus_conn *owner;
 
-		owner = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_RETURN(owner);
+		ASSERT_NONZERO(owner = kdbus_hello(env->buspath, 0, NULL, 0));
 
-		ret = kdbus_name_acquire(owner, "com.example.c", NULL);
-		ASSERT_EXIT(ret >= 0);
+		ASSERT_EXIT_ZERO(kdbus_name_acquire(owner, "com.example.c", NULL));
 
-		ret = kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret >= 0);
-		ret = kdbus_msg_recv_poll(owner, 100, NULL, NULL);
-		ASSERT_EXIT(ret >= 0);
+		ASSERT_ZERO(kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0, 0, 0));
+		ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(owner, 100, NULL, NULL));
 
 		kdbus_conn_free(owner);
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged bus users can talk to privileged users if a
@@ -1022,18 +850,13 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_TALK,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(conn_b, 100, NULL, NULL));
 
 	/*
 	 * Make sure unprivileged bus users can talk to privileged users if a
@@ -1046,18 +869,13 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_TALK,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(conn_b, 100, NULL, NULL));
 
 	/*
 	 * Make sure unprivileged bus users can talk to privileged users if a
@@ -1070,18 +888,13 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_TALK,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(conn_b, 100, NULL, NULL));
 
 	/*
 	 * Make sure unprivileged bus users cannot talk to privileged users if
@@ -1117,15 +930,11 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		},
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.b", acc, num);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.b", acc, num));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret == -EPERM);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT(ONTIZEN(0,-EPERM),==,kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure unprivileged bus users can talk to privileged users if a
@@ -1138,18 +947,13 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
-	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-	ASSERT_EXIT(ret >= 0);
+	ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(conn_b, 100, NULL, NULL));
 
 	/*
 	 * Make sure the TALK cache is reset correctly when policies are
@@ -1162,26 +966,17 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_TALK,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1));
 
-	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret >= 0);
+	RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 
-		ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-		ASSERT_EXIT(ret >= 0);
+		ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(conn_b, 100, NULL, NULL));
 
-		ret = kdbus_conn_update_policy(conn_a, "com.example.b",
-					       NULL, 0);
-		ASSERT_RETURN(ret == 0);
+		ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.b", NULL, 0));
 
-		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret == -EPERM);
+		ASSERT_EXIT(ONTIZEN(0,-EPERM),==,kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0, 0, 0));
 	}));
-	ASSERT_RETURN(ret >= 0);
 
 	/*
 	 * Make sure the TALK cache is reset correctly when policy holders
@@ -1194,43 +989,33 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_OWN,
 	};
 
-	conn = kdbus_hello_registrar(env->buspath, "com.example.c",
-				     NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(conn);
+	ASSERT_NONZERO(conn = kdbus_hello_registrar(env->buspath, "com.example.c", NULL, 0, KDBUS_HELLO_POLICY_HOLDER));
 
-	ret = kdbus_conn_update_policy(conn, "com.example.c", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn, "com.example.c", &access, 1));
 
-	owner = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(owner);
+	ASSERT_NONZERO(owner = kdbus_hello(env->buspath, 0, NULL, 0));
 
-	ret = kdbus_name_acquire(owner, "com.example.c", NULL);
-	ASSERT_RETURN(ret >= 0);
+	ASSERT_ZERO(kdbus_name_acquire(owner, "com.example.c", NULL));
 
-	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
+	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
 		struct kdbus_conn *unpriv;
 
 		/* wait for parent to be finished */
 		sigemptyset(&sset);
 		ret = sigsuspend(&sset);
-		ASSERT_RETURN(ret == -1 && errno == EINTR);
+		ASSERT_RETURN(errno,==,EINTR);
+		ASSERT_RETURN(ret,==,-1);
 
-		unpriv = kdbus_hello(env->buspath, 0, NULL, 0);
-		ASSERT_RETURN(unpriv);
+		ASSERT_NONZERO(unpriv = kdbus_hello(env->buspath, 0, NULL, 0));
 
-		ret = kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret >= 0);
+		ASSERT_EXIT_ZERO(kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0, 0, 0));
 
-		ret = kdbus_msg_recv_poll(owner, 100, NULL, NULL);
-		ASSERT_EXIT(ret >= 0);
+		ASSERT_EXIT(0,<=,kdbus_msg_recv_poll(owner, 100, NULL, NULL));
 
 		/* free policy holder */
 		kdbus_conn_free(conn);
 
-		ret = kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0,
-				     0, 0, 0, NULL);
-		ASSERT_EXIT(ret == -EPERM);
+		ASSERT_EXIT(ONTIZEN(0,-EPERM),==,kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0, 0, 0));
 
 		kdbus_conn_free(unpriv);
 	}), ({
@@ -1238,15 +1023,12 @@ static int test_policy_priv(struct kdbus_test_env *env)
 		kdbus_conn_free(conn);
 		kill(pid, SIGUSR1);
 	}));
-	ASSERT_RETURN(ret >= 0);
-
 
 	/*
 	 * The following tests are necessary.
 	 */
 
-	ret = test_broadcast_after_policy_upload(env);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(test_broadcast_after_policy_upload(env));
 
 	kdbus_conn_free(owner);
 
@@ -1260,7 +1042,7 @@ static int test_policy_priv(struct kdbus_test_env *env)
 	return TEST_OK;
 }
 
-int kdbus_test_policy_priv(struct kdbus_test_env *env)
+wur int kdbus_test_policy_priv(struct kdbus_test_env *env)
 {
 	pid_t pid;
 	int ret;
diff --git a/tools/testing/selftests/kdbus/test-policy.c b/tools/testing/selftests/kdbus/test-policy.c
index 96d20d5e9172..830440bdd7a2 100644
--- a/tools/testing/selftests/kdbus/test-policy.c
+++ b/tools/testing/selftests/kdbus/test-policy.c
@@ -11,28 +11,17 @@
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
 
-int kdbus_test_policy(struct kdbus_test_env *env)
+wur int kdbus_test_policy(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn_a, *conn_b;
 	struct kdbus_policy_access access;
-	int ret;
 
 	/* Invalid name */
-	conn_a = kdbus_hello_registrar(env->buspath, ".example.a",
-				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(conn_a == NULL);
+	ASSERT_ZERO(kdbus_hello_registrar(env->buspath, ".example.a", NULL, 0, KDBUS_HELLO_POLICY_HOLDER));
+	ASSERT_ZERO(kdbus_hello_registrar(env->buspath, "example", NULL, 0, KDBUS_HELLO_POLICY_HOLDER));
 
-	conn_a = kdbus_hello_registrar(env->buspath, "example",
-				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(conn_a == NULL);
-
-	conn_a = kdbus_hello_registrar(env->buspath, "com.example.a",
-				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(conn_a);
-
-	conn_b = kdbus_hello_registrar(env->buspath, "com.example.b",
-				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-	ASSERT_RETURN(conn_b);
+	ASSERT_NONZERO(conn_a = kdbus_hello_registrar(env->buspath, "com.example.a", NULL, 0, KDBUS_HELLO_POLICY_HOLDER));
+	ASSERT_NONZERO(conn_b = kdbus_hello_registrar(env->buspath, "com.example.b", NULL, 0, KDBUS_HELLO_POLICY_HOLDER));
 
 	/*
 	 * Verify there cannot be any duplicate entries, except for specific vs.
@@ -45,33 +34,24 @@ int kdbus_test_policy(struct kdbus_test_env *env)
 		.access = KDBUS_POLICY_SEE,
 	};
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1));
 
-	ret = kdbus_conn_update_policy(conn_b, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == -EEXIST);
+	ASSERT_RETURN(-EEXIST,==,kdbus_conn_update_policy(conn_b, "com.example.a", &access, 1));
 
-	ret = kdbus_conn_update_policy(conn_b, "com.example.a.*", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_b, "com.example.a.*", &access, 1));
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.a.*", &access, 1);
-	ASSERT_RETURN(ret == -EEXIST);
+	ASSERT_RETURN(-EEXIST,==,kdbus_conn_update_policy(conn_a, "com.example.a.*", &access, 1));
 
-	ret = kdbus_conn_update_policy(conn_a, "com.example.*", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_a, "com.example.*", &access, 1));
 
-	ret = kdbus_conn_update_policy(conn_b, "com.example.a", &access, 1);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_conn_update_policy(conn_b, "com.example.a", &access, 1));
 
-	ret = kdbus_conn_update_policy(conn_b, "com.example.*", &access, 1);
-	ASSERT_RETURN(ret == -EEXIST);
+	ASSERT_RETURN(-EEXIST,==,kdbus_conn_update_policy(conn_b, "com.example.*", &access, 1));
 
 	/* Invalid name */
-	ret = kdbus_conn_update_policy(conn_b, ".example.*", &access, 1);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_conn_update_policy(conn_b, ".example.*", &access, 1));
 
-	ret = kdbus_conn_update_policy(conn_b, "example", &access, 1);
-	ASSERT_RETURN(ret == -EINVAL);
+	ASSERT_RETURN(-EINVAL,==,kdbus_conn_update_policy(conn_b, "example", &access, 1));
 
 	kdbus_conn_free(conn_b);
 	kdbus_conn_free(conn_a);
diff --git a/tools/testing/selftests/kdbus/test-send.c b/tools/testing/selftests/kdbus/test-send.c
deleted file mode 100644
index 9bd8c8f74500..000000000000
--- a/tools/testing/selftests/kdbus/test-send.c
+++ /dev/null
@@ -1,84 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-#include <fcntl.h>
-#include <stdlib.h>
-/* Use in conjunction with test-kdbus-daemon */
-
-#include <unistd.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <errno.h>
-#include <assert.h>
-#include <poll.h>
-#include <sys/ioctl.h>
-
-#include "kdbus-test.h"
-#include "kdbus-util.h"
-#include "kdbus-enum.h"
-
-int get_file(const char *fname, int flags, const char *content)
-{
-	FILE *f;
-
-	if (access(fname, F_OK) < 0) {
-		f = fopen(fname, "w");
-		if (!f)
-			return -1;
-		fprintf(f, "%s\n", content);
-		fclose(f);
-	}
-
-	return open(fname, flags);
-}
-
-int kdbus_test_send(struct kdbus_test_env *env)
-{
-	int ret;
-	int serial = 1;
-	int fds[3];
-	size_t i;
-
-	if (!env->conn)
-		return EXIT_FAILURE;
-
-	fds[0] = get_file("/tmp/kdbus-test-send.rd", O_RDONLY, "foo");
-	fds[1] = get_file("/tmp/kdbus-test-send.wr", O_WRONLY, "bar");
-	fds[2] = get_file("/tmp/kdbus-test-send.rdwr", O_RDWR, "baz");
-
-	for (i = 0; i < ELEMENTSOF(fds); i++) {
-		if (fds[i] < 0) {
-			fprintf(stderr, "Unable to open data/fileN file(s)\n");
-			return EXIT_FAILURE;
-		}
-	}
-
-	ret = kdbus_msg_send(env->conn, "com.example.kdbus-test", serial++,
-			     0, 0, 0, 0, 0, NULL);
-	if (ret < 0)
-		fprintf(stderr, "error sending simple message: %d (%m)\n",
-			ret);
-
-	ret = kdbus_msg_send(env->conn, "com.example.kdbus-test", serial++,
-			     0, 0, 0, 0, 1, fds);
-	if (ret < 0)
-		fprintf(stderr, "error sending message with 1 fd: %d (%m)\n",
-			ret);
-
-	ret = kdbus_msg_send(env->conn, "com.example.kdbus-test", serial++,
-			     0, 0, 0, 0, 2, fds);
-	if (ret < 0)
-		fprintf(stderr, "error sending message with 2 fds: %d (%m)\n",
-			ret);
-
-	ret = kdbus_msg_send(env->conn, "com.example.kdbus-test", serial++,
-			     0, 0, 0, 0, 3, fds);
-	if (ret < 0)
-		fprintf(stderr, "error sending message with 3 fds: %d (%m)\n",
-			ret);
-
-	for (i = 0; i < ELEMENTSOF(fds); i++)
-		close(fds[i]);
-
-	return EXIT_SUCCESS;
-}
diff --git a/tools/testing/selftests/kdbus/test-sync.c b/tools/testing/selftests/kdbus/test-sync.c
index 77c3c4142246..3e7212c2be30 100644
--- a/tools/testing/selftests/kdbus/test-sync.c
+++ b/tools/testing/selftests/kdbus/test-sync.c
@@ -22,7 +22,7 @@
 static struct kdbus_conn *conn_a, *conn_b;
 static unsigned int cookie = 0xdeadbeef;
 
-static void nop_handler(int sig) {}
+static void nop_handler(int sig) { UNUSED(sig); }
 
 static int interrupt_sync(struct kdbus_conn *conn_src,
 			  struct kdbus_conn *conn_dst)
@@ -37,36 +37,31 @@ static int interrupt_sync(struct kdbus_conn *conn_src,
 
 	cookie++;
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, pid);
+	ASSERT_RETURN_VAL(pid,>=,0, pid);
 
 	if (pid == 0) {
-		ret = sigaction(SIGINT, &sa, NULL);
-		ASSERT_EXIT(ret == 0);
+		ASSERT_EXIT_ZERO(sigaction(SIGINT, &sa, NULL));
 
-		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-					  KDBUS_MSG_EXPECT_REPLY,
-					  100000000ULL, 0, conn_src->id, -1);
-		ASSERT_EXIT(ret == -ETIMEDOUT);
+		ASSERT_EXIT(-ETIMEDOUT,==,kdbus_msg_send_sync(conn_dst, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, 100000000ULL, 0, conn_src->id, -1));
 
-		_exit(EXIT_SUCCESS);
+		exit(EXIT_SUCCESS);
 	}
 
-	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv_poll(conn_src, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
 
 	ret = kill(pid, SIGINT);
-	ASSERT_RETURN_VAL(ret == 0, ret);
+	ASSERT_RETURN_VAL(ret,==,0, ret);
 
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
 	if (WIFSIGNALED(status))
 		return TEST_ERR;
 
-	ret = kdbus_msg_recv_poll(conn_src, 100, NULL, NULL);
-	ASSERT_RETURN(ret == -ETIMEDOUT);
+	ASSERT_RETURN(-ETIMEDOUT,==,kdbus_msg_recv_poll(conn_src, 100, NULL, NULL));
 
 	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
 }
@@ -79,18 +74,15 @@ static int close_epipe_sync(const char *bus)
 	struct kdbus_conn *conn_dst;
 	struct kdbus_msg *msg = NULL;
 
-	conn_src = kdbus_hello(bus, 0, NULL, 0);
-	ASSERT_RETURN(conn_src);
+	ASSERT_NONZERO(conn_src = kdbus_hello(bus, 0, NULL, 0));
 
-	ret = kdbus_add_match_empty(conn_src);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_add_match_empty(conn_src));
 
-	conn_dst = kdbus_hello(bus, 0, NULL, 0);
-	ASSERT_RETURN(conn_dst);
+	ASSERT_NONZERO(conn_dst = kdbus_hello(bus, 0, NULL, 0));
 
 	cookie++;
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, pid);
+	ASSERT_RETURN_VAL(pid,>=,0, pid);
 
 	if (pid == 0) {
 		uint64_t dst_id;
@@ -99,26 +91,24 @@ static int close_epipe_sync(const char *bus)
 		dst_id = conn_dst->id;
 		kdbus_conn_free(conn_dst);
 
-		ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-		ASSERT_EXIT(ret == 0 && msg->cookie == cookie);
-		ASSERT_EXIT(msg->src_id == dst_id);
+		ASSERT_EXIT_ZERO(kdbus_msg_recv_poll(conn_src, -1, &msg, NULL));
+		ASSERT_EXIT(msg->cookie,==,cookie);
+		ASSERT_EXIT(msg->src_id,==,dst_id);
 
 		cookie++;
-		ret = kdbus_msg_send_sync(conn_src, NULL, cookie,
-					  KDBUS_MSG_EXPECT_REPLY,
-					  100000000ULL, 0, dst_id, -1);
-		ASSERT_EXIT(ret == -EPIPE);
+		/* it seems this test is inherently racy - EPIPE and ECONNRESET are pretty much indistinguishable - we should probably check for either of them */
+		ret = kdbus_msg_send_sync(conn_src, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, 5000000000000ULL, 0, dst_id, -1);
+		if (-EPIPE != ret)
+			ASSERT_EXIT(-ECONNRESET,==,ret); /* need big timeout because we're not synchronized wrt dst_id closing */
 
-		_exit(EXIT_SUCCESS);
+		exit(EXIT_SUCCESS);
 	}
 
-	ret = kdbus_msg_send(conn_dst, NULL, cookie, 0, 0, 0,
-			     KDBUS_DST_ID_BROADCAST, 0, NULL);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(kdbus_msg_send(conn_dst, NULL, cookie, 0, 0, 0, KDBUS_DST_ID_BROADCAST));
 
 	cookie++;
-	ret = kdbus_msg_recv_poll(conn_dst, 100, &msg, NULL);
-	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv_poll(conn_dst, -1, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
 
@@ -127,7 +117,7 @@ static int close_epipe_sync(const char *bus)
 	kdbus_conn_free(conn_src);
 
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
 	if (!WIFEXITED(status))
 		return TEST_ERR;
@@ -145,32 +135,26 @@ static int cancel_fd_sync(struct kdbus_conn *conn_src,
 	struct kdbus_msg *msg = NULL;
 
 	cancel_fd = eventfd(0, 0);
-	ASSERT_RETURN_VAL(cancel_fd >= 0, cancel_fd);
+	ASSERT_RETURN_VAL(cancel_fd,>=,0, cancel_fd);
 
 	cookie++;
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, pid);
+	ASSERT_RETURN_VAL(pid,>=,0, pid);
 
 	if (pid == 0) {
-		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-					  KDBUS_MSG_EXPECT_REPLY,
-					  100000000ULL, 0, conn_src->id,
-					  cancel_fd);
-		ASSERT_EXIT(ret == -ECANCELED);
-
-		_exit(EXIT_SUCCESS);
+		ASSERT_EXIT(-ECANCELED,==,kdbus_msg_send_sync(conn_dst, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, 500000000000ULL, 0, conn_src->id, cancel_fd));
+		exit(EXIT_SUCCESS);
 	}
 
-	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
+	ASSERT_ZERO(kdbus_msg_recv_poll(conn_src, 100, &msg, NULL));
+	ASSERT_RETURN(msg->cookie,==,cookie);
 
 	kdbus_msg_free(msg);
 
-	ret = write(cancel_fd, &counter, sizeof(counter));
-	ASSERT_RETURN(ret == sizeof(counter));
+	ASSERT_RETURN((int)sizeof(counter),==,write(cancel_fd, &counter, sizeof(counter)));
 
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
 	if (WIFSIGNALED(status))
 		return TEST_ERR;
@@ -189,32 +173,28 @@ static int no_cancel_sync(struct kdbus_conn *conn_src,
 	/* pass eventfd, but never signal it so it shouldn't have any effect */
 
 	cancel_fd = eventfd(0, 0);
-	ASSERT_RETURN_VAL(cancel_fd >= 0, cancel_fd);
+	ASSERT_RETURN_VAL(cancel_fd,>=,0, cancel_fd);
 
 	cookie++;
 	pid = fork();
-	ASSERT_RETURN_VAL(pid >= 0, pid);
+	ASSERT_RETURN_VAL(pid,>=,0, pid);
 
 	if (pid == 0) {
-		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-					  KDBUS_MSG_EXPECT_REPLY,
-					  100000000ULL, 0, conn_src->id,
-					  cancel_fd);
-		ASSERT_EXIT(ret == 0);
-
-		_exit(EXIT_SUCCESS);
+		ASSERT_EXIT_ZERO(kdbus_msg_send_sync(conn_dst, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, 500000000000ULL, 0, conn_src->id, cancel_fd));
+		exit(EXIT_SUCCESS);
 	}
 
 	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-	ASSERT_RETURN_VAL(ret == 0 && msg->cookie == cookie, -1);
+	ASSERT_RETURN_VAL(ret,==,0, -1);
+	ASSERT_RETURN_VAL(msg->cookie,==,cookie, -1);
 
 	kdbus_msg_free(msg);
 
 	ret = kdbus_msg_send_reply(conn_src, cookie, conn_dst->id);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
 	ret = waitpid(pid, &status, 0);
-	ASSERT_RETURN_VAL(ret >= 0, ret);
+	ASSERT_RETURN_VAL(ret,>=,0, ret);
 
 	if (WIFSIGNALED(status))
 		return -1;
@@ -224,24 +204,22 @@ static int no_cancel_sync(struct kdbus_conn *conn_src,
 
 static void *run_thread_reply(void *data)
 {
-	int ret;
 	unsigned long status = TEST_OK;
+	UNUSED(data);
 
-	ret = kdbus_msg_recv_poll(conn_a, 3000, NULL, NULL);
-	if (ret < 0)
+	if (0 > kdbus_msg_recv_poll(conn_a, 3000, NULL, NULL))
 		goto exit_thread;
 
 	kdbus_printf("Thread received message, sending reply ...\n");
 
-	/* using an unknown cookie must fail */
-	ret = kdbus_msg_send_reply(conn_a, ~cookie, conn_b->id);
-	if (ret != -EPERM) {
+	/* using an unknown cookie must fail iff not TIZEN */
+	if (ONTIZEN(0,-EBADSLT) != kdbus_msg_send_reply(conn_a, ~cookie, conn_b->id))
+	{
 		status = TEST_ERR;
 		goto exit_thread;
 	}
 
-	ret = kdbus_msg_send_reply(conn_a, cookie, conn_b->id);
-	if (ret != 0) {
+	if (kdbus_msg_send_reply(conn_a, cookie, conn_b->id)) {
 		status = TEST_ERR;
 		goto exit_thread;
 	}
@@ -257,31 +235,23 @@ int kdbus_test_sync_reply(struct kdbus_test_env *env)
 	pthread_t thread;
 	int ret;
 
-	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_a && conn_b);
+	ASSERT_NONZERO(conn_a = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(conn_b = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	pthread_create(&thread, NULL, run_thread_reply, NULL);
 
 	ret = kdbus_msg_send_sync(conn_b, NULL, cookie,
 				  KDBUS_MSG_EXPECT_REPLY,
-				  5000000000ULL, 0, conn_a->id, -1);
+				  KDBUS_TIMEOUT_INFINITE, 0, conn_a->id, -1);
 
 	pthread_join(thread, (void *) &status);
-	ASSERT_RETURN(status == 0);
-	ASSERT_RETURN(ret == 0);
-
-	ret = interrupt_sync(conn_a, conn_b);
-	ASSERT_RETURN(ret == 0);
-
-	ret = close_epipe_sync(env->buspath);
-	ASSERT_RETURN(ret == 0);
-
-	ret = cancel_fd_sync(conn_a, conn_b);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(status);
+	ASSERT_ZERO(ret);
 
-	ret = no_cancel_sync(conn_a, conn_b);
-	ASSERT_RETURN(ret == 0);
+	ASSERT_ZERO(interrupt_sync(conn_a, conn_b));
+	ASSERT_ZERO(close_epipe_sync(env->buspath));
+	ASSERT_ZERO(cancel_fd_sync(conn_a, conn_b));
+	ASSERT_ZERO(no_cancel_sync(conn_a, conn_b));
 
 	kdbus_printf("-- closing bus connections\n");
 
@@ -297,16 +267,13 @@ int kdbus_test_sync_reply(struct kdbus_test_env *env)
 static void *run_thread_byebye(void *data)
 {
 	struct kdbus_cmd cmd_byebye = { .size = sizeof(cmd_byebye) };
-	int ret;
 
-	ret = kdbus_msg_recv_poll(conn_a, 3000, NULL, NULL);
-	if (ret == 0) {
+	if (0 == kdbus_msg_recv_poll(conn_a, 3000, NULL, NULL)) {
 		kdbus_printf("Thread received message, invoking BYEBYE ...\n");
-		kdbus_msg_recv(conn_a, NULL, NULL);
 		if (data == BYEBYE_ME)
-			kdbus_cmd_byebye(conn_b->fd, &cmd_byebye);
+			ASSERT_EXIT_ZERO(kdbus_cmd_byebye(conn_b->fd, &cmd_byebye));
 		else if (data == BYEBYE_THEM)
-			kdbus_cmd_byebye(conn_a->fd, &cmd_byebye);
+			ASSERT_EXIT_ZERO(kdbus_cmd_byebye(conn_a->fd, &cmd_byebye));
 	}
 
 	pthread_exit(NULL);
@@ -316,7 +283,6 @@ static void *run_thread_byebye(void *data)
 int kdbus_test_sync_byebye(struct kdbus_test_env *env)
 {
 	pthread_t thread;
-	int ret;
 
 	/*
 	 * This sends a synchronous message to a thread, which waits until it
@@ -331,34 +297,24 @@ int kdbus_test_sync_byebye(struct kdbus_test_env *env)
 	 * reply cannot be sent by a disconnected target.
 	 */
 
-	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_a && conn_b);
+	ASSERT_NONZERO(conn_a = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(conn_b = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	pthread_create(&thread, NULL, run_thread_byebye, BYEBYE_ME);
 
-	ret = kdbus_msg_send_sync(conn_b, NULL, cookie,
-				  KDBUS_MSG_EXPECT_REPLY,
-				  5000000000ULL, 0, conn_a->id, -1);
-
-	ASSERT_RETURN(ret == -ECONNRESET);
+	ASSERT_RETURN(-ECONNRESET,==,kdbus_msg_send_sync(conn_b, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, 5000000000ULL, 0, conn_a->id, -1));
 
 	pthread_join(thread, NULL);
 
 	kdbus_conn_free(conn_a);
 	kdbus_conn_free(conn_b);
 
-	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_a && conn_b);
+	ASSERT_NONZERO(conn_a = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(conn_b = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	pthread_create(&thread, NULL, run_thread_byebye, BYEBYE_THEM);
 
-	ret = kdbus_msg_send_sync(conn_b, NULL, cookie,
-				  KDBUS_MSG_EXPECT_REPLY,
-				  5000000000ULL, 0, conn_a->id, -1);
-
-	ASSERT_RETURN(ret == -EPIPE);
+	ASSERT_RETURN(-EPIPE,==,kdbus_msg_send_sync(conn_b, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, 5000000000ULL, 0, conn_a->id, -1));
 
 	pthread_join(thread, NULL);
 
diff --git a/tools/testing/selftests/kdbus/test-timeout.c b/tools/testing/selftests/kdbus/test-timeout.c
index a5cdaf270809..5e15dda72024 100644
--- a/tools/testing/selftests/kdbus/test-timeout.c
+++ b/tools/testing/selftests/kdbus/test-timeout.c
@@ -16,7 +16,7 @@
 #include "kdbus-util.h"
 #include "kdbus-enum.h"
 
-int timeout_msg_recv(struct kdbus_conn *conn, uint64_t *expected)
+wur int timeout_msg_recv(struct kdbus_conn *conn, uint64_t type, uint64_t *cookie_reply, uint64_t *seqnum, uint64_t *monotonic_ns, uint64_t *realtime_ns)
 {
 	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
 	struct kdbus_msg *msg;
@@ -30,11 +30,35 @@ int timeout_msg_recv(struct kdbus_conn *conn, uint64_t *expected)
 
 	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
 
-	ASSERT_RETURN_VAL(msg->payload_type == KDBUS_PAYLOAD_KERNEL, -EINVAL);
-	ASSERT_RETURN_VAL(msg->src_id == KDBUS_SRC_ID_KERNEL, -EINVAL);
-	ASSERT_RETURN_VAL(msg->dst_id == conn->id, -EINVAL);
+	ASSERT_RETURN_VAL(msg->payload_type,==,(typeof(msg->payload_type))KDBUS_PAYLOAD_KERNEL, -EINVAL);
+	ASSERT_RETURN_VAL(msg->src_id,==,(typeof(msg->src_id))KDBUS_SRC_ID_KERNEL, -EINVAL);
+	ASSERT_RETURN_VAL(msg->dst_id,==,conn->id, -EINVAL);
+
+	{
+		const struct kdbus_item *item;
+		bool have_type = false;
+		bool have_timestamp = false;
+
+		KDBUS_ITEM_FOREACH(item, msg, items) {
+			if (item->type == type) {
+				ASSERT_ZERO(have_type);
+				have_type = true;
+				ASSERT_RETURN(item->size,==,2*sizeof(uint64_t));
+				continue;
+			}
+			ASSERT_RETURN(item->type,==,(uint64_t)KDBUS_ITEM_TIMESTAMP);
+			ASSERT_ZERO(have_timestamp);
+			have_timestamp = true;
+			ASSERT_RETURN(item->size,==,2*sizeof(uint64_t) + sizeof(struct kdbus_timestamp));
+			#define S(P) if (P) *P = item->timestamp.P;
+				S(seqnum)
+				S(monotonic_ns)
+				S(realtime_ns)
+			#undef S
+		}
+	}
 
-	*expected &= ~(1ULL << msg->cookie_reply);
+	*cookie_reply = msg->cookie_reply;
 	kdbus_printf("Got message timeout for cookie %llu\n",
 		     msg->cookie_reply);
 
@@ -45,7 +69,7 @@ int timeout_msg_recv(struct kdbus_conn *conn, uint64_t *expected)
 	return 0;
 }
 
-int kdbus_test_timeout(struct kdbus_test_env *env)
+wur int kdbus_test_timeout(struct kdbus_test_env *env)
 {
 	struct kdbus_conn *conn_a, *conn_b;
 	struct pollfd fd;
@@ -53,9 +77,8 @@ int kdbus_test_timeout(struct kdbus_test_env *env)
 	uint64_t expected = 0;
 	uint64_t cookie = 0xdeadbeef;
 
-	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-	ASSERT_RETURN(conn_a && conn_b);
+	ASSERT_NONZERO(conn_a = kdbus_hello(env->buspath, 0, NULL, 0));
+	ASSERT_NONZERO(conn_b = kdbus_hello(env->buspath, 0, NULL, 0));
 
 	fd.fd = conn_b->fd;
 
@@ -66,14 +89,12 @@ int kdbus_test_timeout(struct kdbus_test_env *env)
 	for (i = 0; i < n_msgs; i++, cookie++) {
 		kdbus_printf("Sending message with cookie %llu ...\n",
 			     (unsigned long long)cookie);
-		ASSERT_RETURN(kdbus_msg_send(conn_b, NULL, cookie,
-			      KDBUS_MSG_EXPECT_REPLY,
-			      (i + 1) * 100ULL * 1000000ULL, 0,
-			      conn_a->id, 0, NULL) == 0);
+		ASSERT_ZERO(kdbus_msg_send(conn_b, NULL, cookie, KDBUS_MSG_EXPECT_REPLY, (i + 1) * 100ULL * 1000000ULL, 0, conn_a->id));
 		expected |= 1ULL << cookie;
 	}
 
 	for (;;) {
+		uint64_t cookie_reply;
 		fd.events = POLLIN | POLLPRI | POLLHUP;
 		fd.revents = 0;
 
@@ -84,13 +105,13 @@ int kdbus_test_timeout(struct kdbus_test_env *env)
 			break;
 
 		if (fd.revents & POLLIN)
-			ASSERT_RETURN(!timeout_msg_recv(conn_b, &expected));
+			ASSERT_ZERO(timeout_msg_recv(conn_b, KDBUS_ITEM_REPLY_TIMEOUT, &cookie_reply, NULL, NULL, NULL));
 
-		if (expected == 0)
+		if (!(expected &= ~(1ULL << cookie_reply)))
 			break;
 	}
 
-	ASSERT_RETURN(expected == 0);
+	ASSERT_ZERO(expected);
 
 	kdbus_conn_free(conn_a);
 	kdbus_conn_free(conn_b);