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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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8
mm/slub.c
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@ -1356,13 +1356,13 @@ static inline void kmalloc_large_node_hook(void *ptr, size_t size, gfp_t flags)
kasan_kmalloc_large(ptr, size, flags);
}
static inline void kfree_hook(void *x)
static __always_inline void kfree_hook(void *x)
{
kmemleak_free(x);
kasan_kfree_large(x);
kasan_kfree_large(x, _RET_IP_);
}
static inline void *slab_free_hook(struct kmem_cache *s, void *x)
static __always_inline void *slab_free_hook(struct kmem_cache *s, void *x)
{
void *freeptr;
@ -1390,7 +1390,7 @@ static inline void *slab_free_hook(struct kmem_cache *s, void *x)
* kasan_slab_free() may put x into memory quarantine, delaying its
* reuse. In this case the object's freelist pointer is changed.
*/
kasan_slab_free(s, x);
kasan_slab_free(s, x, _RET_IP_);
return freeptr;
}