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avcodec/takdec: Fix integer overflow in decorrelate()

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Fixes: signed integer overflow: -2424832 - 2145653689 cannot be represented in type 'int'
Fixes: 16138/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TAK_fuzzer-5643451346976768

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit f1192736494a5b16717de66da4a3d3c6af0e9a7a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-08-25 17:49:15 +02:00
parent 089b1e1677
commit da76ca5551
1 changed files with 1 additions and 1 deletions
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libavcodec/takdec.c
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@ -653,7 +653,7 @@ static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
s->residues[i ] * s->filter[0];
}
v = av_clip_intp2(v >> 10, 13) * (1 << dshift) - *p1;
v = av_clip_intp2(v >> 10, 13) * (1U << dshift) - *p1;
*p1++ = v;
}