diff options
| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2016-08-02 23:02:55 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-02 23:31:41 +0200 |
| commit | 7e088978933ee186533355ae03a9dc1de99cf6c7 (patch) | |
| tree | 009af8de8842183482dc3619f429bceafd8e65bb /mm/kasan/kasan.c | |
| parent | mm/kasan: get rid of ->state in struct kasan_alloc_meta (diff) | |
| download | linux-7e088978933ee186533355ae03a9dc1de99cf6c7.tar.xz linux-7e088978933ee186533355ae03a9dc1de99cf6c7.zip | |
kasan: improve double-free reports
Currently we just dump stack in case of double free bug.
Let's dump all info about the object that we have.
[aryabinin@virtuozzo.com: change double free message per Alexander]
Link: http://lkml.kernel.org/r/1470153654-30160-1-git-send-email-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/1470062715-14077-6-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan/kasan.c')
| -rw-r--r-- | mm/kasan/kasan.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c index 92750e3b0083..88af13c00d3c 100644 --- a/mm/kasan/kasan.c +++ b/mm/kasan/kasan.c @@ -543,8 +543,7 @@ bool kasan_slab_free(struct kmem_cache *cache, void *object) shadow_byte = READ_ONCE(*(s8 *)kasan_mem_to_shadow(object)); if (shadow_byte < 0 || shadow_byte >= KASAN_SHADOW_SCALE_SIZE) { - pr_err("Double free"); - dump_stack(); + kasan_report_double_free(cache, object, shadow_byte); return true; } |