diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2018-04-06 02:21:28 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-06 07:36:24 +0300 |
| commit | be4a7988b35db9e6f95dca818d5e94785840fb58 (patch) | |
| tree | d6e19b6f6472fa8ccb6359bf04ea3f729d83c90c | |
| parent | 0293d1fdd677a09b816df0c7bfe8f60d1b9b956f (diff) | |
| download | linux-be4a7988b35db9e6f95dca818d5e94785840fb58.tar.xz | |
kasan: make kasan_cache_create() work with 32-bit slab cache sizes
If SLAB doesn't support 4GB+ kmem caches (it never did), KASAN should
not do it as well.
Link: http://lkml.kernel.org/r/20180305200730.15812-20-adobriyan@gmail.com
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/kasan.h | 4 | ||||
| -rw-r--r-- | mm/kasan/kasan.c | 12 | ||||
| -rw-r--r-- | mm/slab.c | 2 | ||||
| -rw-r--r-- | mm/slub.c | 2 |
4 files changed, 10 insertions, 10 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h index d6459bd1376d..de784fd11d12 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -43,7 +43,7 @@ void kasan_unpoison_stack_above_sp_to(const void *watermark); 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, +void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, slab_flags_t *flags); void kasan_cache_shrink(struct kmem_cache *cache); void kasan_cache_shutdown(struct kmem_cache *cache); @@ -92,7 +92,7 @@ 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 int *size, slab_flags_t *flags) {} static inline void kasan_cache_shrink(struct kmem_cache *cache) {} static inline void kasan_cache_shutdown(struct kmem_cache *cache) {} diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c index e13d911251e7..f7a5e1d1ba87 100644 --- a/mm/kasan/kasan.c +++ b/mm/kasan/kasan.c @@ -323,9 +323,9 @@ void kasan_free_pages(struct page *page, unsigned int order) * Adaptive redzone policy taken from the userspace AddressSanitizer runtime. * For larger allocations larger redzones are used. */ -static size_t optimal_redzone(size_t object_size) +static unsigned int optimal_redzone(unsigned int object_size) { - int rz = + return object_size <= 64 - 16 ? 16 : object_size <= 128 - 32 ? 32 : object_size <= 512 - 64 ? 64 : @@ -333,14 +333,13 @@ static size_t optimal_redzone(size_t object_size) object_size <= (1 << 14) - 256 ? 256 : object_size <= (1 << 15) - 512 ? 512 : object_size <= (1 << 16) - 1024 ? 1024 : 2048; - return rz; } -void kasan_cache_create(struct kmem_cache *cache, size_t *size, +void kasan_cache_create(struct kmem_cache *cache, unsigned int *size, slab_flags_t *flags) { + unsigned int orig_size = *size; int redzone_adjust; - int orig_size = *size; /* Add alloc meta. */ cache->kasan_info.alloc_meta_offset = *size; @@ -358,7 +357,8 @@ void kasan_cache_create(struct kmem_cache *cache, size_t *size, if (redzone_adjust > 0) *size += redzone_adjust; - *size = min(KMALLOC_MAX_SIZE, max(*size, cache->object_size + + *size = min_t(unsigned int, KMALLOC_MAX_SIZE, + max(*size, cache->object_size + optimal_redzone(cache->object_size))); /* diff --git a/mm/slab.c b/mm/slab.c index 063a02d79c8e..fb106e8277b7 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -1994,7 +1994,7 @@ int __kmem_cache_create(struct kmem_cache *cachep, slab_flags_t flags) size_t ralign = BYTES_PER_WORD; gfp_t gfp; int err; - size_t size = cachep->size; + unsigned int size = cachep->size; #if DEBUG #if FORCED_DEBUG diff --git a/mm/slub.c b/mm/slub.c index b4a739f8f84d..dfead847961c 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3458,7 +3458,7 @@ static void set_cpu_partial(struct kmem_cache *s) static int calculate_sizes(struct kmem_cache *s, int forced_order) { slab_flags_t flags = s->flags; - size_t size = s->object_size; + unsigned int size = s->object_size; int order; /* |