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avcodec/wavpack: Fix runtime error: signed integer overflow: 2081021665 - -130689706 cannot be represented in type 'int'

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Fixes: 2038/clusterfuzz-testcase-minimized-4521466148159488

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 2017-06-04 17:14:13 +02:00
parent 29808fff33
commit e2bbb95d58
1 changed files with 1 additions and 1 deletions
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2
libavcodec/wavpack.c
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@ -248,7 +248,7 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
add -= (mid - (unsigned)base);
base = mid;
} else
add = mid - base - 1;
add = mid - (unsigned)base - 1;
mid = (base * 2U + add + 1) >> 1;
}
ret = mid;