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 Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/mxfdec.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 8eae9f87afa..41281c5196d 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -1924,6 +1924,11 @@ 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; } } -- 2.46.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
