ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Sun Feb 13 15:20:02 2022 +0100| [710e51677a6f3a5c2b37dc31a597957a22a5e531] | committer: Michael Niedermayer
avformat/matroskadec: Check pre_ns Fixes: division by 0 Fixes: 44615/clusterfuzz-testcase-minimized-ffmpeg_dem_WEBM_DASH_MANIFEST_fuzzer-6681108677263360 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=710e51677a6f3a5c2b37dc31a597957a22a5e531 --- libavformat/matroskadec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index c6709a267b..d97fc33d44 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -4209,6 +4209,8 @@ static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t // prebuffered. pre_bytes = desc_end.end_offset - desc_end.start_offset; pre_ns = desc_end.end_time_ns - desc_end.start_time_ns; + if (pre_ns <= 0) + return -1; pre_sec = pre_ns / nano_seconds_per_second; prebuffer_bytes += pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
