diff options
Diffstat (limited to 'malloc/hooks.c')
| -rw-r--r-- | malloc/hooks.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/malloc/hooks.c b/malloc/hooks.c index 6474ba8b38..fc285f15c6 100644 --- a/malloc/hooks.c +++ b/malloc/hooks.c @@ -260,6 +260,8 @@ free_check (void *mem, const void *caller) if (!mem) return; + int err = errno; + #ifdef USE_MTAG /* Quickly check that the freed pointer matches the tag for the memory. This gives a useful double-free detection. */ @@ -274,12 +276,16 @@ free_check (void *mem, const void *caller) { __libc_lock_unlock (main_arena.mutex); munmap_chunk (p); - return; } - /* Mark the chunk as belonging to the library again. */ - (void)TAG_REGION (chunk2rawmem (p), CHUNK_AVAILABLE_SIZE (p) - CHUNK_HDR_SZ); - _int_free (&main_arena, p, 1); - __libc_lock_unlock (main_arena.mutex); + else + { + /* Mark the chunk as belonging to the library again. */ + (void)TAG_REGION (chunk2rawmem (p), CHUNK_AVAILABLE_SIZE (p) + - CHUNK_HDR_SZ); + _int_free (&main_arena, p, 1); + __libc_lock_unlock (main_arena.mutex); + } + __set_errno (err); } static void * |