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Code Issues Releases Activity

avformat/mxfdec: Use 64bit in remainder

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Fixes: signed integer overflow: 48000 * 223587 cannot be represented in type 'int'
Fixes: 54513/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5817594836025344

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-12-25 22:02:13 +01:00
parent 902a49c4cd
commit 64a04fc165
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GPG Key ID: B18E8928B3948D64
1 changed files with 2 additions and 2 deletions
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libavformat/mxfdec.c
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@ -3857,8 +3857,8 @@ static int64_t mxf_compute_sample_count(MXFContext *mxf, AVStream *st,
if ((sample_rate.num / sample_rate.den) == 48000) {
return av_rescale_q(edit_unit, sample_rate, track->edit_rate);
} else {
int remainder = (sample_rate.num * time_base.num) %
(time_base.den * sample_rate.den);
int64_t remainder = (sample_rate.num * (int64_t) time_base.num) %
( time_base.den * (int64_t)sample_rate.den);
if (remainder)
av_log(mxf->fc, AV_LOG_WARNING,
"seeking detected on stream #%d with time base (%d/%d) and "