kasan: don't use __builtin_return_address(1)
__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 <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>a
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/slub.c b/mm/slub.c
index b54f878..e381728 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -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;
}