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| author | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2016-01-13 00:52:58 +0100 |
|---|---|---|
| committer | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2016-01-28 01:21:15 +0100 |
| commit | 1d8a6a46a30393608fa618472aeb48bc5e469db2 (patch) | |
| tree | 2aa6d535a0bc7bbea8f45eeabe68c05a266ba88e | |
| parent | e577e712a8a22571068f6d02177d067d67a21931 (diff) | |
| download | ffmpeg-1d8a6a46a30393608fa618472aeb48bc5e469db2.tar.gz | |
dca: fix misaligned access in avpriv_dca_convert_bitstream
src and dst are only 8-bit-aligned, so accessing them as uint16_t causes
SIGBUS crashes on architectures like sparc.
This fixes ubsan runtime error: load of misaligned address for type
'const uint16_t', which requires 2 byte alignment
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 44ac13eed49593f4f8efdb72ab0d5b48e05aa305)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
| -rw-r--r-- | libavcodec/dca.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/libavcodec/dca.c b/libavcodec/dca.c index 8dd043088e..714509b267 100644 --- a/libavcodec/dca.c +++ b/libavcodec/dca.c @@ -41,8 +41,6 @@ int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, { uint32_t mrk; int i, tmp; - const uint16_t *ssrc = (const uint16_t *) src; - uint16_t *sdst = (uint16_t *) dst; PutBitContext pb; if ((unsigned) src_size > (unsigned) max_size) @@ -54,8 +52,11 @@ int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, memcpy(dst, src, src_size); return src_size; case DCA_SYNCWORD_CORE_LE: - for (i = 0; i < (src_size + 1) >> 1; i++) - *sdst++ = av_bswap16(*ssrc++); + for (i = 0; i < (src_size + 1) >> 1; i++) { + AV_WB16(dst, AV_RL16(src)); + src += 2; + dst += 2; + } return src_size; case DCA_SYNCWORD_CORE_14B_BE: case DCA_SYNCWORD_CORE_14B_LE: |