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avformat/xwma: Use av_rescale() for duration computation 

Fixes: signed integer overflow: 34242363648 * 538976288 cannot be represented in type 'long'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6577923913547776

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 2c789f753c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-09-18 16:45:30 +02:00
parent fa4fdc7ffb
commit a9fcab5cdc
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1 changed files with 1 additions and 1 deletions
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libavformat/xwma.c
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@ -253,7 +253,7 @@ static int xwma_read_header(AVFormatContext *s)
* the total duration using the average bits per sample and the
* total data length.
*/
st->duration = (size<<3) * st->codecpar->sample_rate / st->codecpar->bit_rate;
st->duration = av_rescale((size<<3), st->codecpar->sample_rate, st->codecpar->bit_rate);
}
fail: