ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Sun Dec 1 03:53:42 2024 +0100| [f7cc023f06c42fce8652b8d8f8cf981d36aeed2e] | committer: Michael Niedermayer
avformat/mxfdec: Check edit_unit for being larger than signed 64bit Fixes: signed integer overflow: 2 * -4962931467012268000 cannot be represented in type 'long' Fixes: 376496313/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4921469185884160 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=f7cc023f06c42fce8652b8d8f8cf981d36aeed2e --- libavformat/mxfdec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 1bae523c2a..02db8d4cb3 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -1928,6 +1928,8 @@ static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_t // clamp to actual range of index index_end = av_sat_add64(last_segment->index_start_position, last_segment->index_duration); edit_unit = FFMAX(FFMIN(edit_unit, index_end), first_segment->index_start_position); + if (edit_unit < 0) + return AVERROR_PATCHWELCOME; // guess which table segment this edit unit is in // saturation is fine since it's just a guess _______________________________________________ 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".
