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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-03 01:33:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-04 23:47:55 +0200 |
| commit | e7dda51150b73e5fbdccf4c2d3a72e356980fba3 (patch) | |
| tree | 644574802d4a9fa8fd2b5a554e5fedb685e34aad /libavcodec/opus_silk.c | |
| parent | dce80a4b47efaba97707bda781a9ee57f5a26974 (diff) | |
| download | ffmpeg-e7dda51150b73e5fbdccf4c2d3a72e356980fba3.tar.gz | |
avcodec/opus_silk: Change silk_lsf2lpc() slightly toward silk/NLSF2A.c
Fixes: runtime error: signed integer overflow: -1440457022 - 785819492 cannot be represented in type 'int'
Fixes: 7700/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_OPUS_fuzzer-6595838684954624
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/opus_silk.c')
| -rw-r--r-- | libavcodec/opus_silk.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/libavcodec/opus_silk.c b/libavcodec/opus_silk.c index 344333cc18..2fcbf3b9d3 100644 --- a/libavcodec/opus_silk.c +++ b/libavcodec/opus_silk.c @@ -239,8 +239,10 @@ static void silk_lsf2lpc(const int16_t nlsf[16], float lpcf[16], int order) /* reconstruct A(z) */ for (k = 0; k < order>>1; k++) { - lpc32[k] = -p[k + 1] - p[k] - q[k + 1] + q[k]; - lpc32[order-k-1] = -p[k + 1] - p[k] + q[k + 1] - q[k]; + int32_t p_tmp = p[k + 1] + p[k]; + int32_t q_tmp = q[k + 1] - q[k]; + lpc32[k] = -q_tmp - p_tmp; + lpc32[order-k-1] = q_tmp - p_tmp; } /* limit the range of the LPC coefficients to each fit within an int16_t */ |