ffmpeg | branch: release/4.3 | Michael Niedermayer <mich...@niedermayer.cc> | Thu Sep 12 22:29:04 2024 +0200| [99129350624ef9aaeeb024bbd87f3bc1d75f47aa] | committer: Michael Niedermayer
avformat/mxfdec: More offset_temp checks Fixes: signed integer overflow: 9223372036854775807 - -1927491430256034080 cannot be represented in type 'long' Fixes: 70607/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-5282235077951488 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Tomas Härdin <g...@haerdin.se> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 5a96aa435af0d66bdec52ee115cf4dd971855fcd) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=99129350624ef9aaeeb024bbd87f3bc1d75f47aa --- libavformat/mxfdec.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 91d10a27b7..4baf4913ee 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -1632,6 +1632,11 @@ static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_t return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out, partition_out); } else { /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */ + if (s->edit_unit_byte_count && (s->index_duration > INT64_MAX / s->edit_unit_byte_count || + s->edit_unit_byte_count * s->index_duration > INT64_MAX - offset_temp) + ) + return AVERROR_INVALIDDATA; + offset_temp += s->edit_unit_byte_count * s->index_duration; } } _______________________________________________ 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".
