[FFmpeg-cvslog] avformat/xwma: Use av_rescale() for duration computation
Michael Niedermayer
git at videolan.org
Sat Sep 24 20:22:54 EEST 2022
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Sep 18 16:45:30 2022 +0200| [2c789f753c3657be9041307f9c03749f5ba5a6bb] | committer: Michael Niedermayer
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 at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2c789f753c3657be9041307f9c03749f5ba5a6bb
---
libavformat/xwma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/xwma.c b/libavformat/xwma.c
index c16ff1be63..12689f37fd 100644
--- a/libavformat/xwma.c
+++ b/libavformat/xwma.c
@@ -278,7 +278,7 @@ 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:
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