Using kasan_poison_memory() or check_invalid_free() currently results in function calls. Move their definitions to mm/kasan/kasan.h and turn them into static inline functions for hardware tag-based mode to avoid unneeded function calls. Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Link: https://linux-review.googlesource.com/id/Ia9d8191024a12d1374675b3d27197f10193f50bb --- mm/kasan/hw_tags.c | 15 --------------- mm/kasan/kasan.h | 28 ++++++++++++++++++++++++---- 2 files changed, 24 insertions(+), 19 deletions(-) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index 1476ac07666e..0303e49904b4 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -30,27 +30,12 @@ void kasan_init_hw_tags(void) pr_info("KernelAddressSanitizer initialized\n"); } -void kasan_poison_memory(const void *address, size_t size, u8 value) -{ - hw_set_mem_tag_range(kasan_reset_tag(address), - round_up(size, KASAN_GRANULE_SIZE), value); -} - void kasan_unpoison_memory(const void *address, size_t size) { hw_set_mem_tag_range(kasan_reset_tag(address), round_up(size, KASAN_GRANULE_SIZE), get_tag(address)); } -bool check_invalid_free(void *addr) -{ - u8 ptr_tag = get_tag(addr); - u8 mem_tag = hw_get_mem_tag(addr); - - return (mem_tag == KASAN_TAG_INVALID) || - (ptr_tag != KASAN_TAG_KERNEL && ptr_tag != mem_tag); -} - void kasan_set_free_info(struct kmem_cache *cache, void *object, u8 tag) { diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 7498839a15d3..ab7314418604 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -153,8 +153,6 @@ struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache, struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache, const void *object); -void kasan_poison_memory(const void *address, size_t size, u8 value); - #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) static inline const void *kasan_shadow_to_mem(const void *shadow_addr) @@ -194,8 +192,6 @@ void print_tags(u8 addr_tag, const void *addr); static inline void print_tags(u8 addr_tag, const void *addr) { } #endif -bool check_invalid_free(void *addr); - void *find_first_bad_addr(void *addr, size_t size); const char *get_bug_type(struct kasan_access_info *info); void metadata_fetch_row(char *buffer, void *row); @@ -279,6 +275,30 @@ static inline u8 random_tag(void) } #endif +#ifdef CONFIG_KASAN_HW_TAGS + +static inline void kasan_poison_memory(const void *address, size_t size, u8 value) +{ + hw_set_mem_tag_range(kasan_reset_tag(address), + round_up(size, KASAN_GRANULE_SIZE), value); +} + +static inline bool check_invalid_free(void *addr) +{ + u8 ptr_tag = get_tag(addr); + u8 mem_tag = hw_get_mem_tag(addr); + + return (mem_tag == KASAN_TAG_INVALID) || + (ptr_tag != KASAN_TAG_KERNEL && ptr_tag != mem_tag); +} + +#else /* CONFIG_KASAN_HW_TAGS */ + +void kasan_poison_memory(const void *address, size_t size, u8 value); +bool check_invalid_free(void *addr); + +#endif /* CONFIG_KASAN_HW_TAGS */ + /* * Exported functions for interfaces called from assembly or from generated * code. Declarations here to avoid warning about missing declarations. -- 2.29.2.222.g5d2a92d10f8-goog
