diff options
Diffstat (limited to 'include/linux/kasan.h')
| -rw-r--r-- | include/linux/kasan.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h index bbf6e2fa4ffd..33387e254caa 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -212,7 +212,7 @@ static __always_inline void * __must_check kasan_krealloc(const void *object, return (void *)object; } -void __kasan_mempool_poison_object(void *ptr, unsigned long ip); +bool __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. @@ -225,16 +225,20 @@ void __kasan_mempool_poison_object(void *ptr, unsigned long ip); * 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. + * bugs and reports them. The caller can use the return value of this function + * to find out if the allocation is buggy. * * 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). + * + * Return: true if the allocation can be safely reused; false otherwise. */ -static __always_inline void kasan_mempool_poison_object(void *ptr) +static __always_inline bool kasan_mempool_poison_object(void *ptr) { if (kasan_enabled()) - __kasan_mempool_poison_object(ptr, _RET_IP_); + return __kasan_mempool_poison_object(ptr, _RET_IP_); + return true; } /* @@ -293,7 +297,10 @@ static inline void *kasan_krealloc(const void *object, size_t new_size, { return (void *)object; } -static inline void kasan_mempool_poison_object(void *ptr) {} +static inline bool kasan_mempool_poison_object(void *ptr) +{ + return true; +} static inline bool kasan_check_byte(const void *address) { return true; |