A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-24 13:44:26 -04:00
Code Issues Projects Releases Packages Wiki Activity

mm, kasan: SLAB support

Browse source 
Add KASAN hooks to SLAB allocator.

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@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexander Potapenko 2016-03-25 14:21:59 -07:00 • committed by Linus Torvalds
commit 7ed2f9e663
12 changed files with 266 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

12
include/linux/kasan.h
View file

@ -48,6 +48,9 @@ void kasan_unpoison_task_stack(struct task_struct *task);
void kasan_alloc_pages(struct page *page, unsigned int order);
void kasan_free_pages(struct page *page, unsigned int order);
void kasan_cache_create(struct kmem_cache *cache, size_t *size,
unsigned long *flags);
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);
@ -61,6 +64,11 @@ void kasan_krealloc(const void *object, size_t new_size);
void kasan_slab_alloc(struct kmem_cache *s, void *object);
void kasan_slab_free(struct kmem_cache *s, void *object);
struct kasan_cache {
int alloc_meta_offset;
int free_meta_offset;
};
int kasan_module_alloc(void *addr, size_t size);
void kasan_free_shadow(const struct vm_struct *vm);
@ -76,6 +84,10 @@ static inline void kasan_disable_current(void) {}
static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
static inline void kasan_free_pages(struct page *page, unsigned int order) {}
static inline void kasan_cache_create(struct kmem_cache *cache,
size_t *size,
unsigned long *flags) {}
static inline void kasan_poison_slab(struct page *page) {}
static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
void *object) {}

6
include/linux/slab.h
View file

@ -92,6 +92,12 @@
# define SLAB_ACCOUNT 0x00000000UL
#endif
#ifdef CONFIG_KASAN
#define SLAB_KASAN 0x08000000UL
#else
#define SLAB_KASAN 0x00000000UL
#endif
/* The following flags affect the page allocator grouping pages by mobility */
#define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* Objects are reclaimable */
#define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */

14
include/linux/slab_def.h
View file

@ -76,8 +76,22 @@ struct kmem_cache {
#ifdef CONFIG_MEMCG
struct memcg_cache_params memcg_params;
#endif
#ifdef CONFIG_KASAN
struct kasan_cache kasan_info;
#endif
struct kmem_cache_node *node[MAX_NUMNODES];
};
static inline void *nearest_obj(struct kmem_cache *cache, struct page *page,
void *x) {
void *object = x - (x - page->s_mem) % cache->size;
void *last_object = page->s_mem + (cache->num - 1) * cache->size;
if (unlikely(object > last_object))
return last_object;
else
return object;
}
#endif /* _LINUX_SLAB_DEF_H */

11
include/linux/slub_def.h
View file

@ -130,4 +130,15 @@ static inline void *virt_to_obj(struct kmem_cache *s,
void object_err(struct kmem_cache *s, struct page *page,
u8 *object, char *reason);
static inline void *nearest_obj(struct kmem_cache *cache, struct page *page,
void *x) {
void *object = x - (x - page_address(page)) % cache->size;
void *last_object = page_address(page) +
(page->objects - 1) * cache->size;
if (unlikely(object > last_object))
return last_object;
else
return object;
}
#endif /* _LINUX_SLUB_DEF_H */