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avformat/mxfdec: Check timecode for overflow

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Fixes: signed integer overflow: 9223372036840103968 + 538976288 cannot be represented in type 'long'
Fixes: 70604/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4844090340999168

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-09-12 22:05:24 +02:00
parent 5a96aa435a
commit 6be3786c82
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1 changed files with 3 additions and 0 deletions
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libavformat/mxfdec.c
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@ -2393,6 +2393,9 @@ static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_t
physical_track->edit_rate,
source_track->edit_rate);
if (av_sat_add64(start_position, mxf_tc->start_frame) != start_position + (uint64_t)mxf_tc->start_frame)
return AVERROR_INVALIDDATA;
if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
return 0;