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| author | Andrey Konovalov <andreyknvl@google.com> | 2020-12-22 12:00:24 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-22 12:55:06 -0800 |
| commit | 1f600626b3a9b77001b3ef90a79bf68c9f7e4cda (patch) | |
| tree | ed3e56b8b1dab6dffe3bdf4258fcbb2b6f140595 /mm/kasan/generic_report.c | |
| parent | cebd0eb29acdfc2f5e44e5f356ffcd0c44f16b4a (diff) | |
| download | linux-1f600626b3a9b77001b3ef90a79bf68c9f7e4cda.tar.bz2 | |
kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_*
This is a preparatory commit for the upcoming addition of a new hardware
tag-based (MTE-based) KASAN mode.
The new mode won't be using shadow memory, but will still use the concept
of memory granules. Each memory granule maps to a single metadata entry:
8 bytes per one shadow byte for generic mode, 16 bytes per one shadow byte
for software tag-based mode, and 16 bytes per one allocation tag for
hardware tag-based mode.
Rename KASAN_SHADOW_SCALE_SIZE to KASAN_GRANULE_SIZE, and
KASAN_SHADOW_MASK to KASAN_GRANULE_MASK.
Also use MASK when used as a mask, otherwise use SIZE.
No functional changes.
Link: https://lkml.kernel.org/r/939b5754e47f528a6e6a6f28ffc5815d8d128033.1606161801.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Marco Elver <elver@google.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: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.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/generic_report.c')
| -rw-r--r-- | mm/kasan/generic_report.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/kasan/generic_report.c b/mm/kasan/generic_report.c index 6bb3f66992df..7d5b9e5c7cfe 100644 --- a/mm/kasan/generic_report.c +++ b/mm/kasan/generic_report.c @@ -34,7 +34,7 @@ void *find_first_bad_addr(void *addr, size_t size) void *p = addr; while (p < addr + size && !(*(u8 *)kasan_mem_to_shadow(p))) - p += KASAN_SHADOW_SCALE_SIZE; + p += KASAN_GRANULE_SIZE; return p; } @@ -46,14 +46,14 @@ static const char *get_shadow_bug_type(struct kasan_access_info *info) shadow_addr = (u8 *)kasan_mem_to_shadow(info->first_bad_addr); /* - * If shadow byte value is in [0, KASAN_SHADOW_SCALE_SIZE) we can look + * If shadow byte value is in [0, KASAN_GRANULE_SIZE) we can look * at the next shadow byte to determine the type of the bad access. */ - if (*shadow_addr > 0 && *shadow_addr <= KASAN_SHADOW_SCALE_SIZE - 1) + if (*shadow_addr > 0 && *shadow_addr <= KASAN_GRANULE_SIZE - 1) shadow_addr++; switch (*shadow_addr) { - case 0 ... KASAN_SHADOW_SCALE_SIZE - 1: + case 0 ... KASAN_GRANULE_SIZE - 1: /* * In theory it's still possible to see these shadow values * due to a data race in the kernel code. |