diff options
Diffstat (limited to 'include/linux/kasan.h')
| -rw-r--r-- | include/linux/kasan.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h index c5fe303bc1c2..de2a695ad34d 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -212,6 +212,29 @@ static __always_inline void * __must_check kasan_krealloc(const void *object, return (void *)object; } +bool __kasan_mempool_poison_pages(struct page *page, unsigned int order, + unsigned long ip); +/** + * kasan_mempool_poison_pages - Check and poison a mempool page allocation. + * @page: Pointer to the page allocation. + * @order: Order of the allocation. + * + * This function is intended for kernel subsystems that cache page allocations + * to reuse them instead of freeing them back to page_alloc (e.g. mempool). + * + * This function is similar to kasan_mempool_poison_object() but operates on + * page allocations. + * + * Return: true if the allocation can be safely reused; false otherwise. + */ +static __always_inline bool kasan_mempool_poison_pages(struct page *page, + unsigned int order) +{ + if (kasan_enabled()) + return __kasan_mempool_poison_pages(page, order, _RET_IP_); + return true; +} + bool __kasan_mempool_poison_object(void *ptr, unsigned long ip); /** * kasan_mempool_poison_object - Check and poison a mempool slab allocation. @@ -326,6 +349,10 @@ static inline void *kasan_krealloc(const void *object, size_t new_size, { return (void *)object; } +static inline bool kasan_mempool_poison_pages(struct page *page, unsigned int order) +{ + return true; +} static inline bool kasan_mempool_poison_object(void *ptr) { return true; |