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| author | Andrey Konovalov <andreyknvl@google.com> | 2023-12-21 21:04:45 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-29 11:58:44 -0800 |
| commit | c20e3feadd4505c46a87dcabef5b129a97992466 (patch) | |
| tree | aad626e0a8180379345df8273d9772c58219d5c7 /mm/kasan/kasan.h | |
| parent | 5cb6674b694b84803cbee8bfccaa2bfdfeb6eae4 (diff) | |
| download | linux-c20e3feadd4505c46a87dcabef5b129a97992466.tar.gz linux-c20e3feadd4505c46a87dcabef5b129a97992466.tar.bz2 linux-c20e3feadd4505c46a87dcabef5b129a97992466.zip | |
kasan: improve kasan_non_canonical_hook
Make kasan_non_canonical_hook to be more sure in its report (i.e. say
"probably" instead of "maybe") if the address belongs to the shadow memory
region for kernel addresses.
Also use the kasan_shadow_to_mem helper to calculate the original address.
Also improve the comments in kasan_non_canonical_hook.
Link: https://lkml.kernel.org/r/af94ef3cb26f8c065048b3158d9f20f6102bfaaa.1703188911.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/kasan/kasan.h')
| -rw-r--r-- | mm/kasan/kasan.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 69e4f5e58e33..0e209b823b2c 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -307,6 +307,12 @@ struct kasan_stack_ring { #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) +static __always_inline bool addr_in_shadow(const void *addr) +{ + return addr >= (void *)KASAN_SHADOW_START && + addr < (void *)KASAN_SHADOW_END; +} + #ifndef kasan_shadow_to_mem static inline const void *kasan_shadow_to_mem(const void *shadow_addr) { |