path: root/include/linux
diff options
authorAndrey Ryabinin <>2015-04-15 16:15:05 -0700
committerLinus Torvalds <>2015-04-15 16:35:20 -0700
commit923936157b158f36bd6a3d86496dce82b1a957de (patch)
tree4a78fc384c220efad52d250b49795b535fbc2db0 /include/linux
parentbda6d33042a486c8f7b15bf15a80fd07d4eab204 (diff)
mm/mempool.c: kasan: poison mempool elements
Mempools keep allocated objects in reserved for situations when ordinary allocation may not be possible to satisfy. These objects shouldn't be accessed before they leave the pool. This patch poison elements when get into the pool and unpoison when they leave it. This will let KASan to detect use-after-free of mempool's elements. Signed-off-by: Andrey Ryabinin <> Tested-by: David Rientjes <> Cc: Catalin Marinas <> Cc: Dmitry Chernenkov <> Cc: Dmitry Vyukov <> Cc: Alexander Potapenko <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'include/linux')
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 5bb074431eb0..5486d777b706 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -44,6 +44,7 @@ void kasan_poison_object_data(struct kmem_cache *cache, void *object);
void kasan_kmalloc_large(const void *ptr, size_t size);
void kasan_kfree_large(const void *ptr);
+void kasan_kfree(void *ptr);
void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size);
void kasan_krealloc(const void *object, size_t new_size);
@@ -71,6 +72,7 @@ static inline void kasan_poison_object_data(struct kmem_cache *cache,
static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
static inline void kasan_kfree_large(const void *ptr) {}
+static inline void kasan_kfree(void *ptr) {}
static inline void kasan_kmalloc(struct kmem_cache *s, const void *object,
size_t size) {}
static inline void kasan_krealloc(const void *object, size_t new_size) {}