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| -rw-r--r-- | include/linux/kasan.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 0d1f925c136d..bbf6e2fa4ffd 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -213,6 +213,24 @@ static __always_inline void * __must_check kasan_krealloc(const void *object, } void __kasan_mempool_poison_object(void *ptr, unsigned long ip); +/** + * kasan_mempool_poison_object - Check and poison a mempool slab allocation. + * @ptr: Pointer to the slab allocation. + * + * This function is intended for kernel subsystems that cache slab allocations + * to reuse them instead of freeing them back to the slab allocator (e.g. + * mempool). + * + * This function poisons a slab allocation without initializing its memory and + * without putting it into the quarantine (for the Generic mode). + * + * This function also performs checks to detect double-free and invalid-free + * bugs and reports them. + * + * This function operates on all slab allocations including large kmalloc + * allocations (the ones returned by kmalloc_large() or by kmalloc() with the + * size > KMALLOC_MAX_SIZE). + */ static __always_inline void kasan_mempool_poison_object(void *ptr) { if (kasan_enabled()) |