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avcodec/wavpack: Fix: runtime error: signed integer overflow: 3 * -2147483648 cannot be represented in type 'int' 

Fixes: 1776/clusterfuzz-testcase-minimized-6191258231898112

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 2017-05-24 00:21:20 +02:00
parent 5782e0ba8c
commit 5f91786fc8
1 changed files with 2 additions and 2 deletions
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4
libavcodec/wavpack.c
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@ -542,9 +542,9 @@ static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb,
t = s->decorr[i].value;
if (t > 8) {
if (t & 1)
A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1];
A = 2U * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1];
else
A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1;
A = (int)(3U * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1;
s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0];
j = 0;
} else {