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| author | Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> | 2021-08-13 16:54:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-13 14:09:31 -1000 |
| commit | 340caf178ddc2efb0294afaf54c715f7928c258e (patch) | |
| tree | 35b2553ed5eb3d14585e1ea308d4129370753b46 | |
| parent | 6c7a00b843370feaf7710cef2350367c7e61cd1a (diff) | |
| download | linux-stable-340caf178ddc2efb0294afaf54c715f7928c258e.tar.gz linux-stable-340caf178ddc2efb0294afaf54c715f7928c258e.tar.bz2 linux-stable-340caf178ddc2efb0294afaf54c715f7928c258e.zip | |
kasan, slub: reset tag when printing address
The address still includes the tags when it is printed. With hardware
tag-based kasan enabled, we will get a false positive KASAN issue when
we access metadata.
Reset the tag before we access the metadata.
Link: https://lkml.kernel.org/r/20210804090957.12393-3-Kuan-Ying.Lee@mediatek.com
Fixes: aa1ef4d7b3f6 ("kasan, mm: reset tags when accessing metadata")
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: Nicholas Tang <nicholas.tang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/slub.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c index af984e4990e8..1583354fbf48 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -576,8 +576,8 @@ static void print_section(char *level, char *text, u8 *addr, unsigned int length) { metadata_access_enable(); - print_hex_dump(level, kasan_reset_tag(text), DUMP_PREFIX_ADDRESS, - 16, 1, addr, length, 1); + print_hex_dump(level, text, DUMP_PREFIX_ADDRESS, + 16, 1, kasan_reset_tag((void *)addr), length, 1); metadata_access_disable(); } |