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avcodec/wavpack: Fix runtime error: signed integer overflow: 2013265955 - -134217694 cannot be represented in type 'int'

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Fixes: 1922/clusterfuzz-testcase-minimized-5561194112876544

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 a47273c803edfbc43793349b74429ae29b05c003)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-31 22:53:02 +02:00
parent 653de8249d
commit d1390a8670
1 changed files with 1 additions and 1 deletions
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2
libavcodec/wavpack.c
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@ -239,7 +239,7 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
if (get_bits_left(gb) <= 0)
goto error;
if (get_bits1(gb)) {
add -= (mid - base);
add -= (mid - (unsigned)base);
base = mid;
} else
add = mid - base - 1;