1 files changed, 79 insertions, 0 deletions
diff --git a/tests/kernel/mmap-dir/test.c b/tests/kernel/mmap-dir/test.c
new file mode 100644
index 0000000..e65e96d
--- /dev/null
+++ b/tests/kernel/mmap-dir/test.c
@@ -0,0 +1,79 @@
+/*
+ * Author: Colin King <colin.king@canonical.com>
+ *
+ * Copyright (C) 2012 Canonical, Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <limits.h>
+
+#define TEST_PASSED	(0)
+#define TEST_FAILED	(1)
+#define TEST_ERROR	(2)
+
+#define MMAP_LEN	(4096)
+
+/*
+ *  https://bugs.launchpad.net/ecryptfs/+bug/400443
+ *
+ *  mmap() on a directory should return -ENODEV, but bug LP: #400443
+ *  ecryptfs returns a mmap'd address which causes SIGBUS on access.
+ */
+int main(int argc, char **argv)
+{
+	int fd;
+	unsigned int *ptr;
+	char path[PATH_MAX];
+
+	if (argc < 2) {
+		fprintf(stderr, "Usage: path\n");
+		exit(TEST_ERROR);
+	}
+	snprintf(path, sizeof(path), "%s/.", argv[1]);
+
+	if ((fd = open(path, O_RDONLY)) < 0) {
+		fprintf(stderr, "Cannot open ./. : %s\n", strerror(errno));
+		exit(TEST_ERROR);
+	}
+
+	ptr = mmap(NULL, MMAP_LEN, PROT_READ, MAP_PRIVATE, fd, 0);
+	close(fd);
+
+	if (ptr != MAP_FAILED) {
+		/* Should not be able to mmap onto a directory */
+		fprintf(stderr, "mmap() on a directory should produce return "
+			"MAP_FAILED, instead got %p\n", ptr);
+		munmap(ptr, MMAP_LEN);
+		exit(TEST_FAILED);
+	}
+
+	if (errno != ENODEV) {
+		fprintf(stderr, "mmap() on a directory should return ENODEV, "
+			"instead got %d (%s)\n", errno, strerror(errno));
+		exit(TEST_FAILED);
+	}
+
+	exit(TEST_PASSED);
+}