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kasan: don't use __builtin_return_address(1)

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__builtin_return_address(1) is unreliable without frame pointers.
With defconfig on kmalloc_pagealloc_invalid_free test I am getting:

BUG: KASAN: double-free or invalid-free in           (null)

Pass caller PC from callers explicitly.

Link: http://lkml.kernel.org/r/9b01bc2d237a4df74ff8472a3bf6b7635908de01.1514378558.git.dvyukov@google.com
Signed-off-by: Dmitry Vyukov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>a
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Dmitry Vyukov 2018-02-06 15:36:27 -08:00 • committed by Linus Torvalds
commit ee3ce779b5
6 changed files with 19 additions and 18 deletions
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6
mm/slab.c
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@ -3478,11 +3478,11 @@ free_done:
* Release an obj back to its cache. If the obj has a constructed state, it must
* be in this state _before_ it is released. Called with disabled ints.
*/
static inline void __cache_free(struct kmem_cache *cachep, void *objp,
unsigned long caller)
static __always_inline void __cache_free(struct kmem_cache *cachep, void *objp,
unsigned long caller)
{
/* Put the object into the quarantine, don't touch it for now. */
if (kasan_slab_free(cachep, objp))
if (kasan_slab_free(cachep, objp, _RET_IP_))
return;
___cache_free(cachep, objp, caller);