summaryrefslogtreecommitdiff
path: root/mm/kasan/kasan.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/kasan/kasan.c')
-rw-r--r--mm/kasan/kasan.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c
index e13d911251e7..bc0e68f7dc75 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)));
/*
@@ -382,7 +382,8 @@ void kasan_cache_shrink(struct kmem_cache *cache)
void kasan_cache_shutdown(struct kmem_cache *cache)
{
- quarantine_remove_cache(cache);
+ if (!__kmem_cache_empty(cache))
+ quarantine_remove_cache(cache);
}
size_t kasan_metadata_size(struct kmem_cache *cache)