linux-kernel - [PATCH RFC v2 18/21] kasan: rename kasan_poison

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Message-Id: <5a6f32308101c49da5eef652437bd3da9234c0da.1603372719.git.andreyknvl@google.com>
Date:   Thu, 22 Oct 2020 15:19:10 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Marco Elver <elver@...gle.com>
Cc:     Evgenii Stepanov <eugenis@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>,
        Peter Collingbourne <pcc@...gle.com>,
        Serban Constantinescu <serbanc@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Elena Petrova <lenaptr@...gle.com>,
        Branislav Rankov <Branislav.Rankov@....com>,
        Kevin Brodsky <kevin.brodsky@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kasan-dev@...glegroups.com, linux-arm-kernel@...ts.infradead.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: [PATCH RFC v2 18/21] kasan: rename kasan_poison_kfree

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

No functional changes.

Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
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 8654275aa62e..2ae92f295f76 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -162,6 +162,13 @@ 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 (static_branch_likely(&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,
@@ -202,13 +209,6 @@ 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 (static_branch_likely(&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)
 {
@@ -244,6 +244,7 @@ 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)
 {
@@ -264,7 +265,6 @@ 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 b82dbae0c5d6..5622b0ec0907 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -334,6 +334,14 @@ 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);
@@ -436,14 +444,6 @@ 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 79bff63ecf27..0e8d877fbbc6 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -106,7 +106,7 @@ 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_);
 	if (pool->alloc == mempool_alloc_pages)
 		kasan_free_pages(element, (unsigned long)pool->pool_data);
 }
-- 
2.29.0.rc1.297.gfa9743e501-goog