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Diffstat (limited to 'mm/kasan/common.c')
-rw-r--r--mm/kasan/common.c21
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);
}
}