[PATCH v2 14/20] kasan, mm: rename kasan_poison_kfree

From: Andrey Konovalov
Date: Tue Nov 10 2020 - 17:21:10 EST


Rename kasan_poison_kfree() to kasan_slab_free_mempool() as it better
reflects what this annotation does.

No functional changes.

Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Link: https://linux-review.googlesource.com/id/I5026f87364e556b506ef1baee725144bb04b8810
---
include/linux/kasan.h | 16 ++++++++--------
mm/kasan/common.c | 16 ++++++++--------
mm/mempool.c | 2 +-
3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 779f8e703982..534ab3e2935a 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -177,6 +177,13 @@ static inline bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned
return false;
}

+void __kasan_slab_free_mempool(void *ptr, unsigned long ip);
+static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip)
+{
+ if (kasan_enabled())
+ __kasan_slab_free_mempool(ptr, ip);
+}
+
void * __must_check __kasan_slab_alloc(struct kmem_cache *s,
void *object, gfp_t flags);
static inline void * __must_check kasan_slab_alloc(struct kmem_cache *s,
@@ -217,13 +224,6 @@ static inline void * __must_check kasan_krealloc(const void *object,
return (void *)object;
}

-void __kasan_poison_kfree(void *ptr, unsigned long ip);
-static inline void kasan_poison_kfree(void *ptr, unsigned long ip)
-{
- if (kasan_enabled())
- __kasan_poison_kfree(ptr, ip);
-}
-
void __kasan_kfree_large(void *ptr, unsigned long ip);
static inline void kasan_kfree_large(void *ptr, unsigned long ip)
{
@@ -263,6 +263,7 @@ static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
{
return false;
}
+static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip) {}
static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object,
gfp_t flags)
{
@@ -282,7 +283,6 @@ static inline void *kasan_krealloc(const void *object, size_t new_size,
{
return (void *)object;
}
-static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}

#endif /* CONFIG_KASAN */
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 819403548f2e..60793f8695a8 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -336,6 +336,14 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip)
return ____kasan_slab_free(cache, object, ip, true);
}

+void __kasan_slab_free_mempool(void *ptr, unsigned long ip)
+{
+ struct page *page;
+
+ page = virt_to_head_page(ptr);
+ ____kasan_slab_free(page->slab_cache, ptr, ip, false);
+}
+
static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
{
kasan_set_track(&kasan_get_alloc_meta(cache, object)->alloc_track, flags);
@@ -427,14 +435,6 @@ void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flag
flags, true);
}

-void __kasan_poison_kfree(void *ptr, unsigned long ip)
-{
- struct page *page;
-
- page = virt_to_head_page(ptr);
- ____kasan_slab_free(page->slab_cache, ptr, ip, false);
-}
-
void __kasan_kfree_large(void *ptr, unsigned long ip)
{
if (ptr != page_address(virt_to_head_page(ptr)))
diff --git a/mm/mempool.c b/mm/mempool.c
index f473cdddaff0..b1f39fa75ade 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -104,7 +104,7 @@ static inline void poison_element(mempool_t *pool, void *element)
static __always_inline void kasan_poison_element(mempool_t *pool, void *element)
{
if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
- kasan_poison_kfree(element, _RET_IP_);
+ kasan_slab_free_mempool(element, _RET_IP_);
else if (pool->alloc == mempool_alloc_pages)
kasan_free_pages(element, (unsigned long)pool->pool_data);
}
--
2.29.2.222.g5d2a92d10f8-goog