Andrey Ryabinin b3cbd9bf77 mm/kasan: get rid of ->state in struct kasan_alloc_meta ... The state of object currently tracked in two places - shadow memory, and the ->state field in struct kasan_alloc_meta. We can get rid of the latter. The will save us a little bit of memory. Also, this allow us to move free stack into struct kasan_alloc_meta, without increasing memory consumption. So now we should always know when the last time the object was freed. This may be useful for long delayed use-after-free bugs. As a side effect this fixes following UBSAN warning: UBSAN: Undefined behaviour in mm/kasan/quarantine.c:102:13 member access within misaligned address ffff88000d1efebc for type 'struct qlist_node' which requires 8 byte alignment Link: http://lkml.kernel.org/r/1470062715-14077-5-git-send-email-aryabinin@virtuozzo.com Reported-by: kernel test robot <xiaolong.ye@intel.com> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-08-02 17:31:41 -04:00
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kasan_init.c	x86/kasan, mm: Introduce generic kasan_populate_zero_shadow()	2015-08-22 14:54:55 +02:00
kasan.c	mm/kasan: get rid of ->state in struct kasan_alloc_meta	2016-08-02 17:31:41 -04:00
kasan.h	mm/kasan: get rid of ->state in struct kasan_alloc_meta	2016-08-02 17:31:41 -04:00
Makefile	mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB	2016-07-28 16:07:41 -07:00
quarantine.c	mm/kasan: get rid of ->state in struct kasan_alloc_meta	2016-08-02 17:31:41 -04:00
report.c	mm/kasan: get rid of ->state in struct kasan_alloc_meta	2016-08-02 17:31:41 -04:00