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| author | Andrey Konovalov <andreyknvl@google.com> | 2020-12-22 12:02:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-22 12:55:08 -0800 |
| commit | 2e903b91479782b7dedd869603423d77e079d3de (patch) | |
| tree | 439c3543ca4d436d80fa5839f27b2aa9057572ef /mm/kasan/kasan.h | |
| parent | 0fea6e9af889f1a4e072f5de999e07fe6859fc88 (diff) | |
| download | linux-next-2e903b91479782b7dedd869603423d77e079d3de.tar.gz | |
kasan, arm64: implement HW_TAGS runtime
Provide implementation of KASAN functions required for the hardware
tag-based mode. Those include core functions for memory and pointer
tagging (tags_hw.c) and bug reporting (report_tags_hw.c). Also adapt
common KASAN code to support the new mode.
Link: https://lkml.kernel.org/r/cfd0fbede579a6b66755c98c88c108e54f9c56bf.1606161801.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Marco Elver <elver@google.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan/kasan.h')
| -rw-r--r-- | mm/kasan/kasan.h | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 92cb2c16e314..64560cc71191 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -154,6 +154,11 @@ struct kasan_alloc_meta *get_alloc_info(struct kmem_cache *cache, struct kasan_free_meta *get_free_info(struct kmem_cache *cache, const void *object); +void poison_range(const void *address, size_t size, u8 value); +void unpoison_range(const void *address, size_t size); + +#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) + static inline const void *kasan_shadow_to_mem(const void *shadow_addr) { return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET) @@ -165,9 +170,6 @@ static inline bool addr_has_metadata(const void *addr) return (addr >= kasan_shadow_to_mem((void *)KASAN_SHADOW_START)); } -void poison_range(const void *address, size_t size, u8 value); -void unpoison_range(const void *address, size_t size); - /** * check_memory_region - Check memory region, and report if invalid access. * @addr: the accessed address @@ -179,6 +181,15 @@ void unpoison_range(const void *address, size_t size); bool check_memory_region(unsigned long addr, size_t size, bool write, unsigned long ret_ip); +#else /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */ + +static inline bool addr_has_metadata(const void *addr) +{ + return true; +} + +#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */ + bool check_invalid_free(void *addr); void *find_first_bad_addr(void *addr, size_t size); @@ -215,7 +226,7 @@ static inline void quarantine_reduce(void) { } static inline void quarantine_remove_cache(struct kmem_cache *cache) { } #endif -#ifdef CONFIG_KASAN_SW_TAGS +#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) void print_tags(u8 addr_tag, const void *addr); |