diff options
Diffstat (limited to 'mm/kasan/common.c')
-rw-r--r-- | mm/kasan/common.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/mm/kasan/common.c b/mm/kasan/common.c index fc7f711607e1..2b4869de4985 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -254,7 +254,7 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object, return ____kasan_slab_free(cache, object, ip, true, init); } -static inline bool ____kasan_kfree_large(void *ptr, unsigned long ip) +static inline bool check_page_allocation(void *ptr, unsigned long ip) { if (!kasan_arch_is_ready()) return false; @@ -269,17 +269,14 @@ static inline bool ____kasan_kfree_large(void *ptr, unsigned long ip) return true; } - /* - * The object will be poisoned by kasan_poison_pages() or - * kasan_mempool_poison_object(). - */ - return false; } void __kasan_kfree_large(void *ptr, unsigned long ip) { - ____kasan_kfree_large(ptr, ip); + check_page_allocation(ptr, ip); + + /* The object will be poisoned by kasan_poison_pages(). */ } void * __must_check __kasan_slab_alloc(struct kmem_cache *cache, @@ -429,7 +426,7 @@ void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flag return ____kasan_kmalloc(slab->slab_cache, object, size, flags); } -void __kasan_mempool_poison_object(void *ptr, unsigned long ip) +bool __kasan_mempool_poison_object(void *ptr, unsigned long ip) { struct folio *folio; @@ -442,13 +439,15 @@ void __kasan_mempool_poison_object(void *ptr, unsigned long ip) * KMALLOC_MAX_SIZE, and kmalloc falls back onto page_alloc. */ if (unlikely(!folio_test_slab(folio))) { - if (____kasan_kfree_large(ptr, ip)) - return; + if (check_page_allocation(ptr, ip)) + return false; kasan_poison(ptr, folio_size(folio), KASAN_PAGE_FREE, false); + return true; } else { struct slab *slab = folio_slab(folio); - ____kasan_slab_free(slab->slab_cache, ptr, ip, false, false); + return !____kasan_slab_free(slab->slab_cache, ptr, ip, + false, false); } } |