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-rw-r--r--src/basic/json-internal.h6
-rw-r--r--src/basic/json.c213
-rw-r--r--src/basic/json.h9
-rw-r--r--src/basic/macro.h1
-rw-r--r--src/test/test-json.c35
-rw-r--r--test/fuzz/fuzz-json/crash-56394414822522889
6 files changed, 214 insertions, 59 deletions
diff --git a/src/basic/json-internal.h b/src/basic/json-internal.h
index 6d195eb672..bf158bff0d 100644
--- a/src/basic/json-internal.h
+++ b/src/basic/json-internal.h
@@ -35,6 +35,12 @@ assert_cc(sizeof(JsonValue) == 16U);
#define JSON_VARIANT_MAGIC_EMPTY_STRING ((JsonVariant*) 7)
#define JSON_VARIANT_MAGIC_EMPTY_ARRAY ((JsonVariant*) 8)
#define JSON_VARIANT_MAGIC_EMPTY_OBJECT ((JsonVariant*) 9)
+#define _JSON_VARIANT_MAGIC_MAX ((JsonVariant*) 10)
+
+/* This is only safe as long as we don't define more than 4K magic pointers, i.e. the page size of the simplest
+ * architectures we support. That's because we rely on the fact that malloc() will never allocate from the first memory
+ * page, as it is a faulting page for catching NULL pointer dereferences. */
+assert_cc((uintptr_t) _JSON_VARIANT_MAGIC_MAX < 4096U);
enum { /* JSON tokens */
JSON_TOKEN_END,
diff --git a/src/basic/json.c b/src/basic/json.c
index 7590ca9883..8bbb69674a 100644
--- a/src/basic/json.c
+++ b/src/basic/json.c
@@ -24,6 +24,12 @@
#include "terminal-util.h"
#include "utf8.h"
+/* Refuse putting together variants with a larger depth than 16K by default (as a protection against overflowing stacks
+ * if code processes JSON objects recursively. Note that we store the depth in an uint16_t, hence make sure this
+ * remains under 2^16. */
+#define DEPTH_MAX (16U*1024U)
+assert_cc(DEPTH_MAX <= UINT16_MAX);
+
typedef struct JsonSource {
/* When we parse from a file or similar, encodes the filename, to indicate the source of a json variant */
size_t n_ref;
@@ -45,6 +51,10 @@ struct JsonVariant {
JsonVariant *parent;
};
+ /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */
+ JsonSource *source;
+ unsigned line, column;
+
JsonVariantType type:5;
/* A marker whether this variant is embedded into in array/object or not. If true, the 'parent' pointer above
@@ -59,9 +69,8 @@ struct JsonVariant {
/* While comparing two arrays, we use this for marking what we already have seen */
bool is_marked:1;
- /* If this was parsed from some file or buffer, this stores where from, as well as the source line/column */
- unsigned line, column;
- JsonSource *source;
+ /* The current 'depth' of the JsonVariant, i.e. how many levels of member variants this has */
+ uint16_t depth;
union {
/* For simple types we store the value in-line. */
@@ -130,16 +139,47 @@ static bool json_source_equal(JsonSource *a, JsonSource *b) {
DEFINE_TRIVIAL_CLEANUP_FUNC(JsonSource*, json_source_unref);
+/* There are four kind of JsonVariant* pointers:
+ *
+ * 1. NULL
+ * 2. A 'regular' one, i.e. pointing to malloc() memory
+ * 3. A 'magic' one, i.e. one of the special JSON_VARIANT_MAGIC_XYZ values, that encode a few very basic values directly in the pointer.
+ * 4. A 'const string' one, i.e. a pointer to a const string.
+ *
+ * The four kinds of pointers can be discerned like this:
+ *
+ * Detecting #1 is easy, just compare with NULL. Detecting #3 is similarly easy: all magic pointers are below
+ * _JSON_VARIANT_MAGIC_MAX (which is pretty low, within the first memory page, which is special on Linux and other
+ * OSes, as it is a faulting page). In order to discern #2 and #4 we check the lowest bit. If it's off it's #2,
+ * otherwise #4. This makes use of the fact that malloc() will return "maximum aligned" memory, which definitely
+ * means the pointer is even. This means we can use the uneven pointers to reference static strings, as long as we
+ * make sure that all static strings used like this are aligned to 2 (or higher), and that we mask the bit on
+ * access. The JSON_VARIANT_STRING_CONST() macro encodes strings as JsonVariant* pointers, with the bit set. */
+
static bool json_variant_is_magic(const JsonVariant *v) {
- return v == JSON_VARIANT_MAGIC_TRUE ||
- v == JSON_VARIANT_MAGIC_FALSE ||
- v == JSON_VARIANT_MAGIC_NULL ||
- v == JSON_VARIANT_MAGIC_ZERO_INTEGER ||
- v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED ||
- v == JSON_VARIANT_MAGIC_ZERO_REAL ||
- v == JSON_VARIANT_MAGIC_EMPTY_STRING ||
- v == JSON_VARIANT_MAGIC_EMPTY_ARRAY ||
- v == JSON_VARIANT_MAGIC_EMPTY_OBJECT;
+ if (!v)
+ return false;
+
+ return v < _JSON_VARIANT_MAGIC_MAX;
+}
+
+static bool json_variant_is_const_string(const JsonVariant *v) {
+
+ if (v < _JSON_VARIANT_MAGIC_MAX)
+ return false;
+
+ /* A proper JsonVariant is aligned to whatever malloc() aligns things too, which is definitely not uneven. We
+ * hence use all uneven pointers as indicators for const strings. */
+
+ return (((uintptr_t) v) & 1) != 0;
+}
+
+static bool json_variant_is_regular(const JsonVariant *v) {
+
+ if (v < _JSON_VARIANT_MAGIC_MAX)
+ return false;
+
+ return (((uintptr_t) v) & 1) == 0;
}
static JsonVariant *json_variant_dereference(JsonVariant *v) {
@@ -149,7 +189,7 @@ static JsonVariant *json_variant_dereference(JsonVariant *v) {
if (!v)
return NULL;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
return v;
if (!v->is_reference)
@@ -158,6 +198,18 @@ static JsonVariant *json_variant_dereference(JsonVariant *v) {
return json_variant_dereference(v->reference);
}
+static uint16_t json_variant_depth(JsonVariant *v) {
+
+ v = json_variant_dereference(v);
+ if (!v)
+ return 0;
+
+ if (!json_variant_is_regular(v))
+ return 0;
+
+ return v->depth;
+}
+
static JsonVariant *json_variant_normalize(JsonVariant *v) {
/* Converts json variants to their normalized form, i.e. fully dereferenced and wherever possible converted to
@@ -210,7 +262,7 @@ static JsonVariant *json_variant_conservative_normalize(JsonVariant *v) {
if (!v)
return NULL;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
return v;
if (v->source || v->line > 0 || v->column > 0)
@@ -404,7 +456,7 @@ static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) {
assert(v);
assert(from);
- if (json_variant_is_magic(from))
+ if (!json_variant_is_regular(from))
return;
v->line = from->line;
@@ -413,8 +465,7 @@ static void json_variant_copy_source(JsonVariant *v, JsonVariant *from) {
}
int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) {
- JsonVariant *v;
- size_t i;
+ _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
assert_return(ret, -EINVAL);
if (n == 0) {
@@ -430,22 +481,29 @@ int json_variant_new_array(JsonVariant **ret, JsonVariant **array, size_t n) {
*v = (JsonVariant) {
.n_ref = 1,
.type = JSON_VARIANT_ARRAY,
- .n_elements = n,
};
- for (i = 0; i < n; i++) {
- JsonVariant *w = v + 1 + i;
+ for (v->n_elements = 0; v->n_elements < n; v->n_elements++) {
+ JsonVariant *w = v + 1 + v->n_elements,
+ *c = array[v->n_elements];
+ uint16_t d;
+
+ d = json_variant_depth(c);
+ if (d >= DEPTH_MAX) /* Refuse too deep nesting */
+ return -ELNRNG;
+ if (d >= v->depth)
+ v->depth = d + 1;
*w = (JsonVariant) {
.is_embedded = true,
.parent = v,
};
- json_variant_set(w, array[i]);
- json_variant_copy_source(w, array[i]);
+ json_variant_set(w, c);
+ json_variant_copy_source(w, c);
}
- *ret = v;
+ *ret = TAKE_PTR(v);
return 0;
}
@@ -468,6 +526,7 @@ int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) {
.n_ref = 1,
.type = JSON_VARIANT_ARRAY,
.n_elements = n,
+ .depth = 1,
};
for (i = 0; i < n; i++) {
@@ -476,10 +535,9 @@ int json_variant_new_array_bytes(JsonVariant **ret, const void *p, size_t n) {
*w = (JsonVariant) {
.is_embedded = true,
.parent = v,
+ .type = JSON_VARIANT_UNSIGNED,
+ .value.unsig = ((const uint8_t*) p)[i],
};
-
- w->type = JSON_VARIANT_UNSIGNED;
- w->value.unsig = ((const uint8_t*) p)[i];
}
*ret = v;
@@ -499,22 +557,25 @@ int json_variant_new_array_strv(JsonVariant **ret, char **l) {
return 0;
}
- v = new0(JsonVariant, n + 1);
+ v = new(JsonVariant, n + 1);
if (!v)
return -ENOMEM;
*v = (JsonVariant) {
.n_ref = 1,
.type = JSON_VARIANT_ARRAY,
+ .depth = 1,
};
for (v->n_elements = 0; v->n_elements < n; v->n_elements++) {
JsonVariant *w = v + 1 + v->n_elements;
size_t k;
- w->is_embedded = true;
- w->parent = v;
- w->type = JSON_VARIANT_STRING;
+ *w = (JsonVariant) {
+ .is_embedded = true,
+ .parent = v,
+ .type = JSON_VARIANT_STRING,
+ };
k = strlen(l[v->n_elements]);
@@ -535,8 +596,7 @@ int json_variant_new_array_strv(JsonVariant **ret, char **l) {
}
int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) {
- JsonVariant *v;
- size_t i;
+ _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
assert_return(ret, -EINVAL);
if (n == 0) {
@@ -553,29 +613,40 @@ int json_variant_new_object(JsonVariant **ret, JsonVariant **array, size_t n) {
*v = (JsonVariant) {
.n_ref = 1,
.type = JSON_VARIANT_OBJECT,
- .n_elements = n,
};
- for (i = 0; i < n; i++) {
- JsonVariant *w = v + 1 + i;
+ for (v->n_elements = 0; v->n_elements < n; v->n_elements++) {
+ JsonVariant *w = v + 1 + v->n_elements,
+ *c = array[v->n_elements];
+ uint16_t d;
+
+ if ((v->n_elements & 1) == 0 &&
+ !json_variant_is_string(c))
+ return -EINVAL; /* Every second one needs to be a string, as it is the key name */
+
+ d = json_variant_depth(c);
+ if (d >= DEPTH_MAX) /* Refuse too deep nesting */
+ return -ELNRNG;
+ if (d >= v->depth)
+ v->depth = d + 1;
*w = (JsonVariant) {
.is_embedded = true,
.parent = v,
};
- json_variant_set(w, array[i]);
- json_variant_copy_source(w, array[i]);
+ json_variant_set(w, c);
+ json_variant_copy_source(w, c);
}
- *ret = v;
+ *ret = TAKE_PTR(v);
return 0;
}
static void json_variant_free_inner(JsonVariant *v) {
assert(v);
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
return;
json_source_unref(v->source);
@@ -596,7 +667,7 @@ static void json_variant_free_inner(JsonVariant *v) {
JsonVariant *json_variant_ref(JsonVariant *v) {
if (!v)
return NULL;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
return v;
if (v->is_embedded)
@@ -612,7 +683,7 @@ JsonVariant *json_variant_ref(JsonVariant *v) {
JsonVariant *json_variant_unref(JsonVariant *v) {
if (!v)
return NULL;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
return NULL;
if (v->is_embedded)
@@ -646,6 +717,13 @@ const char *json_variant_string(JsonVariant *v) {
return "";
if (json_variant_is_magic(v))
goto mismatch;
+ if (json_variant_is_const_string(v)) {
+ uintptr_t p = (uintptr_t) v;
+
+ assert((p & 1) != 0);
+ return (const char*) (p ^ 1U);
+ }
+
if (v->is_reference)
return json_variant_string(v->reference);
if (v->type != JSON_VARIANT_STRING)
@@ -665,7 +743,7 @@ bool json_variant_boolean(JsonVariant *v) {
return true;
if (v == JSON_VARIANT_MAGIC_FALSE)
return false;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (v->type != JSON_VARIANT_BOOLEAN)
goto mismatch;
@@ -686,7 +764,7 @@ intmax_t json_variant_integer(JsonVariant *v) {
v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED ||
v == JSON_VARIANT_MAGIC_ZERO_REAL)
return 0;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (v->is_reference)
return json_variant_integer(v->reference);
@@ -734,7 +812,7 @@ uintmax_t json_variant_unsigned(JsonVariant *v) {
v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED ||
v == JSON_VARIANT_MAGIC_ZERO_REAL)
return 0;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (v->is_reference)
return json_variant_integer(v->reference);
@@ -782,7 +860,7 @@ long double json_variant_real(JsonVariant *v) {
v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED ||
v == JSON_VARIANT_MAGIC_ZERO_REAL)
return 0.0;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (v->is_reference)
return json_variant_real(v->reference);
@@ -822,7 +900,7 @@ long double json_variant_real(JsonVariant *v) {
mismatch:
log_debug("Non-integer JSON variant requested as integer, returning 0.");
- return 0;
+ return 0.0;
}
bool json_variant_is_negative(JsonVariant *v) {
@@ -832,7 +910,7 @@ bool json_variant_is_negative(JsonVariant *v) {
v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED ||
v == JSON_VARIANT_MAGIC_ZERO_REAL)
return false;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (v->is_reference)
return json_variant_is_negative(v->reference);
@@ -866,6 +944,9 @@ JsonVariantType json_variant_type(JsonVariant *v) {
if (!v)
return _JSON_VARIANT_TYPE_INVALID;
+ if (json_variant_is_const_string(v))
+ return JSON_VARIANT_STRING;
+
if (v == JSON_VARIANT_MAGIC_TRUE || v == JSON_VARIANT_MAGIC_FALSE)
return JSON_VARIANT_BOOLEAN;
@@ -902,6 +983,10 @@ bool json_variant_has_type(JsonVariant *v, JsonVariantType type) {
if (rt == type)
return true;
+ /* If it's a const string, then it only can be a string, and if it is not, it's not */
+ if (json_variant_is_const_string(v))
+ return false;
+
/* All three magic zeroes qualify as integer, unsigned and as real */
if ((v == JSON_VARIANT_MAGIC_ZERO_INTEGER || v == JSON_VARIANT_MAGIC_ZERO_UNSIGNED || v == JSON_VARIANT_MAGIC_ZERO_REAL) &&
IN_SET(type, JSON_VARIANT_INTEGER, JSON_VARIANT_UNSIGNED, JSON_VARIANT_REAL, JSON_VARIANT_NUMBER))
@@ -945,7 +1030,7 @@ size_t json_variant_elements(JsonVariant *v) {
if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY ||
v == JSON_VARIANT_MAGIC_EMPTY_OBJECT)
return 0;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT))
goto mismatch;
@@ -965,7 +1050,7 @@ JsonVariant *json_variant_by_index(JsonVariant *v, size_t idx) {
if (v == JSON_VARIANT_MAGIC_EMPTY_ARRAY ||
v == JSON_VARIANT_MAGIC_EMPTY_OBJECT)
return NULL;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (!IN_SET(v->type, JSON_VARIANT_ARRAY, JSON_VARIANT_OBJECT))
goto mismatch;
@@ -990,7 +1075,7 @@ JsonVariant *json_variant_by_key_full(JsonVariant *v, const char *key, JsonVaria
goto not_found;
if (v == JSON_VARIANT_MAGIC_EMPTY_OBJECT)
goto not_found;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
goto mismatch;
if (v->type != JSON_VARIANT_OBJECT)
goto mismatch;
@@ -1139,13 +1224,13 @@ int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *r
assert_return(v, -EINVAL);
if (ret_source)
- *ret_source = json_variant_is_magic(v) || !v->source ? NULL : v->source->name;
+ *ret_source = json_variant_is_regular(v) && v->source ? v->source->name : NULL;
if (ret_line)
- *ret_line = json_variant_is_magic(v) ? 0 : v->line;
+ *ret_line = json_variant_is_regular(v) ? v->line : 0;
if (ret_column)
- *ret_column = json_variant_is_magic(v) ? 0 : v->column;
+ *ret_column = json_variant_is_regular(v) ? v->column : 0;
return 0;
}
@@ -1156,7 +1241,7 @@ static int print_source(FILE *f, JsonVariant *v, unsigned flags, bool whitespace
if (!FLAGS_SET(flags, JSON_FORMAT_SOURCE|JSON_FORMAT_PRETTY))
return 0;
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
return 0;
if (!v->source && v->line == 0 && v->column == 0)
@@ -1343,10 +1428,15 @@ static int json_format(FILE *f, JsonVariant *v, unsigned flags, const char *pref
if (n == 0)
fputs("[]", f);
else {
+ _cleanup_free_ char *joined = NULL;
const char *prefix2;
if (flags & JSON_FORMAT_PRETTY) {
- prefix2 = strjoina(strempty(prefix), "\t");
+ joined = strjoin(strempty(prefix), "\t");
+ if (!joined)
+ return -ENOMEM;
+
+ prefix2 = joined;
fputs("[\n", f);
} else {
prefix2 = strempty(prefix);
@@ -1394,10 +1484,15 @@ static int json_format(FILE *f, JsonVariant *v, unsigned flags, const char *pref
if (n == 0)
fputs("{}", f);
else {
+ _cleanup_free_ char *joined = NULL;
const char *prefix2;
if (flags & JSON_FORMAT_PRETTY) {
- prefix2 = strjoina(strempty(prefix), "\t");
+ joined = strjoin(strempty(prefix), "\t");
+ if (!joined)
+ return -ENOMEM;
+
+ prefix2 = joined;
fputs("{\n", f);
} else {
prefix2 = strempty(prefix);
@@ -1587,7 +1682,7 @@ static bool json_single_ref(JsonVariant *v) {
/* Checks whether the caller is the single owner of the object, i.e. can get away with changing it */
- if (json_variant_is_magic(v))
+ if (!json_variant_is_regular(v))
return false;
if (v->is_embedded)
@@ -1614,7 +1709,7 @@ static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned
if (source && column > source->max_column)
source->max_column = column;
- if (json_variant_is_magic(*v)) {
+ if (!json_variant_is_regular(*v)) {
if (!source && line == 0 && column == 0)
return 0;
@@ -1638,7 +1733,7 @@ static int json_variant_set_source(JsonVariant **v, JsonSource *source, unsigned
if (r < 0)
return r;
- assert(!json_variant_is_magic(w));
+ assert(json_variant_is_regular(w));
assert(!w->is_embedded);
assert(w->n_ref == 1);
assert(!w->source);
diff --git a/src/basic/json.h b/src/basic/json.h
index 1f06fe2257..42be60e055 100644
--- a/src/basic/json.h
+++ b/src/basic/json.h
@@ -270,5 +270,14 @@ int json_log_internal(JsonVariant *variant, int level, int error, const char *fi
: -abs(_e); \
})
+#define JSON_VARIANT_STRING_CONST(x) _JSON_VARIANT_STRING_CONST(UNIQ, (x))
+
+#define _JSON_VARIANT_STRING_CONST(xq, x) \
+ ({ \
+ __attribute__((aligned(2))) static const char UNIQ_T(json_string_const, xq)[] = (x); \
+ assert((((uintptr_t) UNIQ_T(json_string_const, xq)) & 1) == 0); \
+ (JsonVariant*) ((uintptr_t) UNIQ_T(json_string_const, xq) + 1); \
+ })
+
const char *json_variant_type_to_string(JsonVariantType t);
JsonVariantType json_variant_type_from_string(const char *s);
diff --git a/src/basic/macro.h b/src/basic/macro.h
index 07065dfe70..ae88fa5b93 100644
--- a/src/basic/macro.h
+++ b/src/basic/macro.h
@@ -1,6 +1,7 @@
/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
+#include <assert.h>
#include <inttypes.h>
#include <stdbool.h>
#include <sys/param.h>
diff --git a/src/test/test-json.c b/src/test/test-json.c
index e145559ae9..6a57f88882 100644
--- a/src/test/test-json.c
+++ b/src/test/test-json.c
@@ -292,6 +292,7 @@ static void test_build(void) {
JSON_BUILD_STRING(NULL),
JSON_BUILD_NULL,
JSON_BUILD_INTEGER(77),
+ JSON_BUILD_ARRAY(JSON_BUILD_VARIANT(JSON_VARIANT_STRING_CONST("foobar")), JSON_BUILD_VARIANT(JSON_VARIANT_STRING_CONST("zzz"))),
JSON_BUILD_STRV(STRV_MAKE("one", "two", "three", "four")))) >= 0);
assert_se(json_variant_format(a, 0, &s) >= 0);
@@ -354,6 +355,38 @@ static void test_source(void) {
printf("--- pretty end ---\n");
}
+static void test_depth(void) {
+ _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+ unsigned i;
+ int r;
+
+ v = JSON_VARIANT_STRING_CONST("start");
+
+ /* Let's verify that the maximum depth checks work */
+
+ for (i = 0;; i++) {
+ _cleanup_(json_variant_unrefp) JsonVariant *w = NULL;
+
+ assert_se(i <= UINT16_MAX);
+ if (i & 1)
+ r = json_variant_new_array(&w, &v, 1);
+ else
+ r = json_variant_new_object(&w, (JsonVariant*[]) { JSON_VARIANT_STRING_CONST("key"), v }, 2);
+ if (r == -ELNRNG) {
+ log_info("max depth at %u", i);
+ break;
+ }
+
+ assert_se(r >= 0);
+
+ json_variant_unref(v);
+ v = TAKE_PTR(w);
+ }
+
+ json_variant_dump(v, 0, stdout, NULL);
+ fputs("\n", stdout);
+}
+
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
@@ -407,5 +440,7 @@ int main(int argc, char *argv[]) {
test_source();
+ test_depth();
+
return 0;
}
diff --git a/test/fuzz/fuzz-json/crash-5639441482252288 b/test/fuzz/fuzz-json/crash-5639441482252288
new file mode 100644
index 0000000000..c6cf59a51e
--- /dev/null
+++ b/test/fuzz/fuzz-json/crash-5639441482252288
@@ -0,0 +1,9 @@
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+
+]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 03:17:31 +0000