[PATCH v2 15/34] kasan: clean up metadata byte definitions
From: <hidden>
Date: 2021-12-06 21:45:56
Also in:
linux-mm, lkml
Subsystem:
kasan, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
From: Andrey Konovalov <redacted> Most of the metadata byte values are only used for Generic KASAN. Remove KASAN_KMALLOC_FREETRACK definition for !CONFIG_KASAN_GENERIC case, and put it along with other metadata values for the Generic mode under a corresponding ifdef. Signed-off-by: Andrey Konovalov <redacted> --- mm/kasan/kasan.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index aebd8df86a1f..a50450160638 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h@@ -71,15 +71,16 @@ static inline bool kasan_sync_fault_possible(void) #define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */ #define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */ #define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */ -#define KASAN_KMALLOC_FREETRACK 0xFA /* object was freed and has free track set */ #else #define KASAN_FREE_PAGE KASAN_TAG_INVALID #define KASAN_PAGE_REDZONE KASAN_TAG_INVALID #define KASAN_KMALLOC_REDZONE KASAN_TAG_INVALID #define KASAN_KMALLOC_FREE KASAN_TAG_INVALID -#define KASAN_KMALLOC_FREETRACK KASAN_TAG_INVALID #endif +#ifdef CONFIG_KASAN_GENERIC + +#define KASAN_KMALLOC_FREETRACK 0xFA /* object was freed and has free track set */ #define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ #define KASAN_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */
@@ -110,6 +111,8 @@ static inline bool kasan_sync_fault_possible(void) #define KASAN_ABI_VERSION 1 #endif +#endif /* CONFIG_KASAN_GENERIC */ + /* Metadata layout customization. */ #define META_BYTES_PER_BLOCK 1 #define META_BLOCKS_PER_ROW 16
--
2.25.1
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