diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2020-12-22 12:01:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-22 12:55:07 -0800 |
| commit | 96e0279df6d8f2a1394de2b41815b0065c031950 (patch) | |
| tree | 2d90e9411e3d560b557277e199de2a4f1b18239a /mm/kasan/report_generic.c | |
| parent | 88b865974d17059e9c9286f08efbebe569e3067b (diff) | |
kasan: separate metadata_fetch_row for each mode
This is a preparatory commit for the upcoming addition of a new hardware
tag-based (MTE-based) KASAN mode.
Rework print_memory_metadata() to make it agnostic with regard to the way
metadata is stored. Allow providing a separate metadata_fetch_row()
implementation for each KASAN mode. Hardware tag-based KASAN will provide
its own implementation that doesn't use shadow memory.
No functional changes for software modes.
Link: https://lkml.kernel.org/r/5fb1ec0152bb1f521505017800387ec3e36ffe18.1606161801.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/report_generic.c')
| -rw-r--r-- | mm/kasan/report_generic.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c index 16ed550850e9..8a9c889872da 100644 --- a/mm/kasan/report_generic.c +++ b/mm/kasan/report_generic.c @@ -123,6 +123,11 @@ const char *get_bug_type(struct kasan_access_info *info) return get_wild_bug_type(info); } +void metadata_fetch_row(char *buffer, void *row) +{ + memcpy(buffer, kasan_mem_to_shadow(row), META_BYTES_PER_ROW); +} + #if CONFIG_KASAN_STACK static bool __must_check tokenize_frame_descr(const char **frame_descr, char *token, size_t max_tok_len, |