diff options
Diffstat (limited to 'mm/kasan')
| -rw-r--r-- | mm/kasan/common.c | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/mm/kasan/common.c b/mm/kasan/common.c index ae0130cf9de3..d0f8d7a955cd 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -331,6 +331,29 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip) return ____kasan_slab_free(cache, object, ip, true); } +void __kasan_slab_free_mempool(void *ptr, unsigned long ip) +{ + struct page *page; + + page = virt_to_head_page(ptr); + + /* + * Even though this function is only called for kmem_cache_alloc and + * kmalloc backed mempool allocations, those allocations can still be + * !PageSlab() when the size provided to kmalloc is larger than + * KMALLOC_MAX_SIZE, and kmalloc falls back onto page_alloc. + */ + if (unlikely(!PageSlab(page))) { + if (ptr != page_address(page)) { + kasan_report_invalid_free(ptr, ip); + return; + } + poison_range(ptr, page_size(page), KASAN_FREE_PAGE); + } else { + ____kasan_slab_free(page->slab_cache, ptr, ip, false); + } +} + static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags) { kasan_set_track(&kasan_get_alloc_meta(cache, object)->alloc_track, flags); @@ -422,23 +445,6 @@ void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flag flags, true); } -void __kasan_poison_kfree(void *ptr, unsigned long ip) -{ - struct page *page; - - page = virt_to_head_page(ptr); - - if (unlikely(!PageSlab(page))) { - if (ptr != page_address(page)) { - kasan_report_invalid_free(ptr, ip); - return; - } - poison_range(ptr, page_size(page), KASAN_FREE_PAGE); - } else { - ____kasan_slab_free(page->slab_cache, ptr, ip, false); - } -} - void __kasan_kfree_large(void *ptr, unsigned long ip) { if (ptr != page_address(virt_to_head_page(ptr))) |