diff options
Diffstat (limited to 'mm/kasan')
-rw-r--r-- | mm/kasan/kasan.c | 12 | ||||
-rw-r--r-- | mm/kasan/kasan.h | 3 | ||||
-rw-r--r-- | mm/kasan/report.c | 3 |
3 files changed, 7 insertions, 11 deletions
diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c index 8aaee42fcfab..ecb64fda79e6 100644 --- a/mm/kasan/kasan.c +++ b/mm/kasan/kasan.c @@ -511,8 +511,7 @@ bool kasan_slab_free(struct kmem_cache *cache, void *object) shadow_byte = READ_ONCE(*(s8 *)kasan_mem_to_shadow(object)); if (shadow_byte < 0 || shadow_byte >= KASAN_SHADOW_SCALE_SIZE) { - kasan_report_double_free(cache, object, - __builtin_return_address(1)); + kasan_report_invalid_free(object, __builtin_return_address(1)); return true; } @@ -602,12 +601,11 @@ void kasan_poison_kfree(void *ptr) kasan_poison_slab_free(page->slab_cache, ptr); } -void kasan_kfree_large(const void *ptr) +void kasan_kfree_large(void *ptr) { - struct page *page = virt_to_page(ptr); - - kasan_poison_shadow(ptr, PAGE_SIZE << compound_order(page), - KASAN_FREE_PAGE); + if (ptr != page_address(virt_to_head_page(ptr))) + kasan_report_invalid_free(ptr, __builtin_return_address(1)); + /* The object will be poisoned by page_alloc. */ } int kasan_module_alloc(void *addr, size_t size) diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 9a768dd71c51..bf353a18c908 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -107,8 +107,7 @@ static inline const void *kasan_shadow_to_mem(const void *shadow_addr) void kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip); -void kasan_report_double_free(struct kmem_cache *cache, void *object, - void *ip); +void kasan_report_invalid_free(void *object, void *ip); #if defined(CONFIG_SLAB) || defined(CONFIG_SLUB) void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache); diff --git a/mm/kasan/report.c b/mm/kasan/report.c index eff12e040498..55916ad21722 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -326,8 +326,7 @@ static void print_shadow_for_address(const void *addr) } } -void kasan_report_double_free(struct kmem_cache *cache, void *object, - void *ip) +void kasan_report_invalid_free(void *object, void *ip) { unsigned long flags; |