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| author | Lasse Collin <lasse.collin@tukaani.org> | 2023-09-14 16:34:07 +0300 |
|---|---|---|
| committer | Jia Tan <jiat0218@gmail.com> | 2023-10-31 01:03:25 +0800 |
| commit | caf00e0988ba47842cfd93dfbb17f7d30120d6e7 (patch) | |
| tree | 9a66d0502171a08ee5137ec3e3d4a7964e379ef7 | |
| parent | CMake: Fix time.h checks not running on second CMake run. (diff) | |
| download | xz-caf00e0988ba47842cfd93dfbb17f7d30120d6e7.tar.xz | |
liblzma: Mark crc64_clmul() with __attribute__((__no_sanitize_address__)).
Thanks to Agostino Sarubbo.
Fixes: https://github.com/tukaani-project/xz/issues/62
| -rw-r--r-- | src/liblzma/check/crc64_fast.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/liblzma/check/crc64_fast.c b/src/liblzma/check/crc64_fast.c index e686dbd7..0c8622a1 100644 --- a/src/liblzma/check/crc64_fast.c +++ b/src/liblzma/check/crc64_fast.c @@ -206,6 +206,14 @@ calc_hi(uint64_t poly, uint64_t a) #if (defined(__GNUC__) || defined(__clang__)) && !defined(__EDG__) __attribute__((__target__("ssse3,sse4.1,pclmul"))) #endif +// The intrinsics use 16-byte-aligned reads from buf, thus they may read +// up to 15 bytes before or after the buffer (depending on the alignment +// of the buf argument). The values of the extra bytes are ignored. +// This unavoidably trips -fsanitize=address so address sanitizier has +// to be disabled for this function. +#if lzma_has_attribute(__no_sanitize_address__) +__attribute__((__no_sanitize_address__)) +#endif static uint64_t crc64_clmul(const uint8_t *buf, size_t size, uint64_t crc) { |