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>

1 files changed, 4 insertions, 4 deletions

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;
 }