ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Wed Dec 25 04:54:32 2024 +0100| [53db3516542c68f5ec92c5cdf8c13d76700ca9d5] | committer: Michael Niedermayer
avformat/mxfdec: Check llen addition for overflow Fixes: signed integer overflow: 9223372036854775807 + 1 cannot be represented in type 'long' Fixes: 377971441/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4966030696316928 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=53db3516542c68f5ec92c5cdf8c13d76700ca9d5 --- libavformat/mxfdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 9ecaa287bb..0d97b3aade 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -496,6 +496,9 @@ static int klv_read_packet(MXFContext *mxf, KLVPacket *klv, AVIOContext *pb) if (length < 0) return length; klv->length = length; + if (klv->offset > INT64_MAX - 16 - llen) + return AVERROR_INVALIDDATA; + pos = klv->offset + 16 + llen; if (pos > INT64_MAX - length) return AVERROR_INVALIDDATA; _______________________________________________ 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".
