[Devel] [PATCH RHEL7 COMMIT] mm, kasan: add GFP flags to KASAN API
Konstantin Khorenko
khorenko at virtuozzo.com
Fri Sep 15 17:14:48 MSK 2017
The commit is pushed to "branch-rh7-3.10.0-693.1.1.vz7.37.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-693.1.1.vz7.37.4
------>
commit cfac584d039e8e5ab91fabd6614c373a20bd375a
Author: Alexander Potapenko <glider at google.com>
Date: Fri Sep 15 17:14:47 2017 +0300
mm, kasan: add GFP flags to KASAN API
Add GFP flags to KASAN hooks for future patches to use.
This patch is based on the "mm: kasan: unified support for SLUB and SLAB
allocators" patch originally prepared by Dmitry Chernenkov.
Signed-off-by: Alexander Potapenko <glider at google.com>
Cc: Christoph Lameter <cl at linux.com>
Cc: Pekka Enberg <penberg at kernel.org>
Cc: David Rientjes <rientjes at google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim at lge.com>
Cc: Andrey Konovalov <adech.fo at gmail.com>
Cc: Dmitry Vyukov <dvyukov at google.com>
Cc: Andrey Ryabinin <ryabinin.a.a at gmail.com>
Cc: Steven Rostedt <rostedt at goodmis.org>
Cc: Konstantin Serebryany <kcc at google.com>
Cc: Dmitry Chernenkov <dmitryc at google.com>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>
https://jira.sw.ru/browse/PSBM-69081
(cherry picked from commit 505f5dcb1c419e55a9621a01f83eb5745d8d7398)
Signed-off-by: Andrey Ryabinin <aryabinin at virtuozzo.com>
---
include/linux/kasan.h | 19 +++++++++++--------
include/linux/slab.h | 4 ++--
mm/kasan/kasan.c | 15 ++++++++-------
mm/mempool.c | 16 ++++++++--------
mm/slab.c | 15 ++++++++-------
mm/slab_common.c | 4 ++--
mm/slub.c | 17 +++++++++--------
7 files changed, 48 insertions(+), 42 deletions(-)
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index f55c31b..ab45598 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -45,13 +45,14 @@ void kasan_poison_slab(struct page *page);
void kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
void kasan_poison_object_data(struct kmem_cache *cache, void *object);
-void kasan_kmalloc_large(const void *ptr, size_t size);
+void kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags);
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);
+void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size,
+ gfp_t flags);
+void kasan_krealloc(const void *object, size_t new_size, gfp_t flags);
-void kasan_slab_alloc(struct kmem_cache *s, void *object);
+void kasan_slab_alloc(struct kmem_cache *s, void *object, gfp_t flags);
void kasan_slab_free(struct kmem_cache *s, void *object);
struct kasan_cache {
@@ -82,14 +83,16 @@ static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
static inline void kasan_poison_object_data(struct kmem_cache *cache,
void *object) {}
-static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
+static inline void kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags) {}
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) {}
+ size_t size, gfp_t flags) {}
+static inline void kasan_krealloc(const void *object, size_t new_size,
+ gfp_t flags) {}
-static inline void kasan_slab_alloc(struct kmem_cache *s, void *object) {}
+static inline void kasan_slab_alloc(struct kmem_cache *s, void *object,
+ gfp_t flags) {}
static inline void kasan_slab_free(struct kmem_cache *s, void *object) {}
static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 7dc1b73..d4946a6 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -322,7 +322,7 @@ static __always_inline void *kmem_cache_alloc_trace(struct kmem_cache *s,
{
void *ret = kmem_cache_alloc(s, flags);
- kasan_kmalloc(s, ret, size);
+ kasan_kmalloc(s, ret, size, flags);
return ret;
}
@@ -333,7 +333,7 @@ kmem_cache_alloc_node_trace(struct kmem_cache *s,
{
void *ret = kmem_cache_alloc_node(s, gfpflags, node);
- kasan_kmalloc(s, ret, size);
+ kasan_kmalloc(s, ret, size, gfpflags);
return ret;
}
#endif /* CONFIG_TRACING */
diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c
index 2e1a640..03a856d 100644
--- a/mm/kasan/kasan.c
+++ b/mm/kasan/kasan.c
@@ -411,9 +411,9 @@ struct kasan_free_meta *get_free_info(struct kmem_cache *cache,
}
#endif
-void kasan_slab_alloc(struct kmem_cache *cache, void *object)
+void kasan_slab_alloc(struct kmem_cache *cache, void *object, gfp_t flags)
{
- kasan_kmalloc(cache, object, cache->object_size);
+ kasan_kmalloc(cache, object, cache->object_size, flags);
}
void kasan_slab_free(struct kmem_cache *cache, void *object)
@@ -439,7 +439,8 @@ void kasan_slab_free(struct kmem_cache *cache, void *object)
kasan_poison_shadow(object, rounded_up_size, KASAN_KMALLOC_FREE);
}
-void kasan_kmalloc(struct kmem_cache *cache, const void *object, size_t size)
+void kasan_kmalloc(struct kmem_cache *cache, const void *object, size_t size,
+ gfp_t flags)
{
unsigned long redzone_start;
unsigned long redzone_end;
@@ -468,7 +469,7 @@ void kasan_kmalloc(struct kmem_cache *cache, const void *object, size_t size)
}
EXPORT_SYMBOL(kasan_kmalloc);
-void kasan_kmalloc_large(const void *ptr, size_t size)
+void kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags)
{
struct page *page;
unsigned long redzone_start;
@@ -487,7 +488,7 @@ void kasan_kmalloc_large(const void *ptr, size_t size)
KASAN_PAGE_REDZONE);
}
-void kasan_krealloc(const void *object, size_t size)
+void kasan_krealloc(const void *object, size_t size, gfp_t flags)
{
struct page *page;
@@ -497,9 +498,9 @@ void kasan_krealloc(const void *object, size_t size)
page = virt_to_head_page(object);
if (unlikely(!PageSlab(page)))
- kasan_kmalloc_large(object, size);
+ kasan_kmalloc_large(object, size, flags);
else
- kasan_kmalloc(page->slab_cache, object, size);
+ kasan_kmalloc(page->slab_cache, object, size, flags);
}
void kasan_kfree(void *ptr)
diff --git a/mm/mempool.c b/mm/mempool.c
index 791ec8a..1d67932 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -112,12 +112,12 @@ static void kasan_poison_element(mempool_t *pool, void *element)
kasan_free_pages(element, (unsigned long)pool->pool_data);
}
-static void kasan_unpoison_element(mempool_t *pool, void *element)
+static void kasan_unpoison_element(mempool_t *pool, void *element, gfp_t flags)
{
if (pool->alloc == mempool_alloc_slab)
- kasan_slab_alloc(pool->pool_data, element);
+ kasan_slab_alloc(pool->pool_data, element, flags);
if (pool->alloc == mempool_kmalloc)
- kasan_krealloc(element, (size_t)pool->pool_data);
+ kasan_krealloc(element, (size_t)pool->pool_data, flags);
if (pool->alloc == mempool_alloc_pages)
kasan_alloc_pages(element, (unsigned long)pool->pool_data);
}
@@ -130,12 +130,12 @@ static void add_element(mempool_t *pool, void *element)
pool->elements[pool->curr_nr++] = element;
}
-static void *remove_element(mempool_t *pool)
+static void *remove_element(mempool_t *pool, gfp_t flags)
{
void *element = pool->elements[--pool->curr_nr];
BUG_ON(pool->curr_nr < 0);
- kasan_unpoison_element(pool, element);
+ kasan_unpoison_element(pool, element, flags);
check_element(pool, element);
return element;
}
@@ -154,7 +154,7 @@ void mempool_destroy(mempool_t *pool)
return;
while (pool->curr_nr) {
- void *element = remove_element(pool);
+ void *element = remove_element(pool, GFP_KERNEL);
pool->free(element, pool->pool_data);
}
kfree(pool->elements);
@@ -249,7 +249,7 @@ int mempool_resize(mempool_t *pool, int new_min_nr, gfp_t gfp_mask)
spin_lock_irqsave(&pool->lock, flags);
if (new_min_nr <= pool->min_nr) {
while (new_min_nr < pool->curr_nr) {
- element = remove_element(pool);
+ element = remove_element(pool, GFP_KERNEL);
spin_unlock_irqrestore(&pool->lock, flags);
pool->free(element, pool->pool_data);
spin_lock_irqsave(&pool->lock, flags);
@@ -332,7 +332,7 @@ void * mempool_alloc(mempool_t *pool, gfp_t gfp_mask)
spin_lock_irqsave(&pool->lock, flags);
if (likely(pool->curr_nr)) {
- element = remove_element(pool);
+ element = remove_element(pool, gfp_temp);
spin_unlock_irqrestore(&pool->lock, flags);
/* paired with rmb in mempool_free(), read comment there */
smp_wmb();
diff --git a/mm/slab.c b/mm/slab.c
index b64c86b..d872667 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3622,7 +3622,7 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
void *ret = slab_alloc(cachep, flags, _RET_IP_);
- kasan_slab_alloc(cachep, ret);
+ kasan_slab_alloc(cachep, ret, flags);
trace_kmem_cache_alloc(_RET_IP_, ret,
cachep->object_size, cachep->size, flags);
@@ -3651,7 +3651,7 @@ kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size)
ret = slab_alloc(cachep, flags, _RET_IP_);
- kasan_kmalloc(cachep, ret, size);
+ kasan_kmalloc(cachep, ret, size, flags);
trace_kmalloc(_RET_IP_, ret,
size, cachep->size, flags);
return ret;
@@ -3664,7 +3664,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
{
void *ret = slab_alloc_node(cachep, flags, nodeid, _RET_IP_);
- kasan_slab_alloc(cachep, ret);
+ kasan_slab_alloc(cachep, ret, flags);
trace_kmem_cache_alloc_node(_RET_IP_, ret,
cachep->object_size, cachep->size,
flags, nodeid);
@@ -3682,7 +3682,8 @@ void *kmem_cache_alloc_node_trace(struct kmem_cache *cachep,
void *ret;
ret = slab_alloc_node(cachep, flags, nodeid, _RET_IP_);
- kasan_kmalloc(cachep, ret, size);
+
+ kasan_kmalloc(cachep, ret, size, flags);
trace_kmalloc_node(_RET_IP_, ret,
size, cachep->size,
flags, nodeid);
@@ -3701,7 +3702,7 @@ __do_kmalloc_node(size_t size, gfp_t flags, int node, unsigned long caller)
if (unlikely(ZERO_OR_NULL_PTR(cachep)))
return cachep;
ret = kmem_cache_alloc_node_trace(cachep, flags, node, size);
- kasan_kmalloc(cachep, ret, size);
+ kasan_kmalloc(cachep, ret, size, flags);
return ret;
}
@@ -3750,7 +3751,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
return cachep;
ret = slab_alloc(cachep, flags, caller);
- kasan_kmalloc(cachep, ret, size);
+ kasan_kmalloc(cachep, ret, size, flags);
trace_kmalloc(caller, ret,
size, cachep->size, flags);
@@ -4581,7 +4582,7 @@ size_t ksize(const void *objp)
/* We assume that ksize callers could use the whole allocated area,
* so we need to unpoison this area.
*/
- kasan_krealloc(objp, size);
+ kasan_krealloc(objp, size, GFP_NOWAIT);
return size;
}
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 7f51a17..13b80eb 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -829,7 +829,7 @@ void *kmalloc_order(size_t size, gfp_t flags, unsigned int order)
page = alloc_pages(flags, order);
ret = page ? page_address(page) : NULL;
kmemleak_alloc(ret, size, 1, flags);
- kasan_kmalloc_large(ret, size);
+ kasan_kmalloc_large(ret, size, flags);
return ret;
}
EXPORT_SYMBOL(kmalloc_order);
@@ -1001,7 +1001,7 @@ static __always_inline void *__do_krealloc(const void *p, size_t new_size,
ks = ksize(p);
if (ks >= new_size) {
- kasan_krealloc((void *)p, new_size);
+ kasan_krealloc((void *)p, new_size, flags);
return (void *)p;
}
diff --git a/mm/slub.c b/mm/slub.c
index 4292050..e32920f 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1284,7 +1284,7 @@ static inline void slab_post_alloc_hook(struct kmem_cache *s, gfp_t flags,
kmemcheck_slab_alloc(s, flags, object, slab_ksize(s));
kmemleak_alloc_recursive(object, s->object_size, 1,
s->flags, flags);
- kasan_slab_alloc(s, object);
+ kasan_slab_alloc(s, object, flags);
}
}
@@ -2549,7 +2549,7 @@ void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
{
void *ret = slab_alloc(s, gfpflags, _RET_IP_);
trace_kmalloc(_RET_IP_, ret, size, s->size, gfpflags);
- kasan_kmalloc(s, ret, size);
+ kasan_kmalloc(s, ret, size, gfpflags);
return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_trace);
@@ -2577,7 +2577,7 @@ void *kmem_cache_alloc_node_trace(struct kmem_cache *s,
trace_kmalloc_node(_RET_IP_, ret,
size, s->size, gfpflags, node);
- kasan_kmalloc(s, ret, size);
+ kasan_kmalloc(s, ret, size, gfpflags);
return ret;
}
EXPORT_SYMBOL(kmem_cache_alloc_node_trace);
@@ -3127,7 +3127,8 @@ static void early_kmem_cache_node_alloc(int node)
init_object(kmem_cache_node, n, SLUB_RED_ACTIVE);
init_tracking(kmem_cache_node, n);
#endif
- kasan_kmalloc(kmem_cache_node, n, sizeof(struct kmem_cache_node));
+ kasan_kmalloc(kmem_cache_node, n, sizeof(struct kmem_cache_node),
+ GFP_KERNEL);
init_kmem_cache_node(n);
inc_slabs_node(kmem_cache_node, node, page->objects);
@@ -3516,7 +3517,7 @@ void *__kmalloc(size_t size, gfp_t flags)
trace_kmalloc(_RET_IP_, ret, size, s->size, flags);
- kasan_kmalloc(s, ret, size);
+ kasan_kmalloc(s, ret, size, flags);
return ret;
}
@@ -3534,7 +3535,7 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
ptr = page_address(page);
kmemleak_alloc(ptr, size, 1, flags);
- kasan_kmalloc_large(ptr, size);
+ kasan_kmalloc_large(ptr, size, flags);
return ptr;
}
@@ -3562,7 +3563,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)
trace_kmalloc_node(_RET_IP_, ret, size, s->size, flags, node);
- kasan_kmalloc(s, ret, size);
+ kasan_kmalloc(s, ret, size, flags);
return ret;
}
@@ -3591,7 +3592,7 @@ size_t ksize(const void *object)
size_t size = __ksize(object);
/* We assume that ksize callers could use whole allocated area,
so we need unpoison this area. */
- kasan_krealloc(object, size);
+ kasan_krealloc(object, size, GFP_NOWAIT);
return size;
}
EXPORT_SYMBOL(ksize);
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