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avcodec/wavarc: Fix integer overflwo in do_stereo() 

Fixes: signed integer overflow: 148676193 - -2006512262 cannot be represented in type 'int'
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-5963163952349184

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-09-21 00:13:27 +02:00
parent c42a89309a
commit f3c986200d
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1 changed files with 2 additions and 2 deletions
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libavcodec/wavarc.c
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@ -154,11 +154,11 @@ static void do_stereo(WavArcContext *s, int ch, int correlated, int len)
} else {
if (correlated) {
for (int n = 0; n < nb_samples; n++)
s->samples[1][n + len] += s->samples[0][n + len];
s->samples[1][n + len] += (unsigned)s->samples[0][n + len];
}
for (int n = 0; n < len; n++) {
s->pred[0][n] = s->samples[1][nb_samples + n];
s->pred[1][n] = s->pred[0][n] - s->samples[0][nb_samples + n];
s->pred[1][n] = s->pred[0][n] - (unsigned)s->samples[0][nb_samples + n];
}
}
}