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| author | Robin Murphy <robin.murphy@arm.com> | 2021-09-17 15:59:30 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-09-21 14:50:19 +0100 |
| commit | 59a68d4138086c015ab8241c3267eec5550fbd44 (patch) | |
| tree | 833d1831affb5f492aceb9beaffe977d07d72b25 /arch/arm64/lib | |
| parent | 8c8a3b5bd960cd88f7655b5251dc28741e11f139 (diff) | |
| download | linux-59a68d4138086c015ab8241c3267eec5550fbd44.tar.gz linux-59a68d4138086c015ab8241c3267eec5550fbd44.tar.bz2 linux-59a68d4138086c015ab8241c3267eec5550fbd44.zip | |
arm64: Mitigate MTE issues with str{n}cmp()
As with strlen(), the patches importing the updated str{n}cmp()
implementations were originally developed and tested before the
advent of CONFIG_KASAN_HW_TAGS, and have subsequently revealed
not to be MTE-safe. Since in-kernel MTE is still a rather niche
case, let it temporarily fall back to the generic C versions for
correctness until we can figure out the best fix.
Fixes: 758602c04409 ("arm64: Import latest version of Cortex Strings' strcmp")
Fixes: 020b199bc70d ("arm64: Import latest version of Cortex Strings' strncmp")
Cc: <stable@vger.kernel.org> # 5.14.x
Reported-by: Branislav Rankov <branislav.rankov@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/34dc4d12eec0adae49b0ac927df642ed10089d40.1631890770.git.robin.murphy@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/lib')
| -rw-r--r-- | arch/arm64/lib/strcmp.S | 2 | ||||
| -rw-r--r-- | arch/arm64/lib/strncmp.S | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/lib/strcmp.S b/arch/arm64/lib/strcmp.S index d7bee210a798..83bcad72ec97 100644 --- a/arch/arm64/lib/strcmp.S +++ b/arch/arm64/lib/strcmp.S @@ -173,4 +173,4 @@ L(done): ret SYM_FUNC_END_PI(strcmp) -EXPORT_SYMBOL_NOKASAN(strcmp) +EXPORT_SYMBOL_NOHWKASAN(strcmp) diff --git a/arch/arm64/lib/strncmp.S b/arch/arm64/lib/strncmp.S index 48d44f7fddb1..e42bcfcd37e6 100644 --- a/arch/arm64/lib/strncmp.S +++ b/arch/arm64/lib/strncmp.S @@ -258,4 +258,4 @@ L(ret0): ret SYM_FUNC_END_PI(strncmp) -EXPORT_SYMBOL_NOKASAN(strncmp) +EXPORT_SYMBOL_NOHWKASAN(strncmp) |