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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-09-30 19:11:34 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-10-03 20:09:27 +0200 |
| commit | dedc78b4b5bdab869f3038798334639d617d2309 (patch) | |
| tree | 821fda2ed82af599d99ccf4a51bb424d9ab2223f /libavformat | |
| parent | 446b0090cbb66ee614dcf6ca79c78dc8eb7f0e37 (diff) | |
| download | ffmpeg-dedc78b4b5bdab869f3038798334639d617d2309.tar.gz | |
avformat/concatdec: Check in/outpoint for overflow
Fixes: signed integer overflow: 91542414454000000 - -9154241494546000000 cannot be represented in type 'long'
Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_dem_CONCAT_fuzzer-4739147999084544
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/concatdec.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c index 5d4f67d0ac..114b6c6564 100644 --- a/libavformat/concatdec.c +++ b/libavformat/concatdec.c @@ -667,7 +667,9 @@ static int concat_read_header(AVFormatContext *avf) else time = cat->files[i].start_time; if (cat->files[i].user_duration == AV_NOPTS_VALUE) { - if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE) + if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE || + cat->files[i].outpoint - (uint64_t)cat->files[i].inpoint != av_sat_sub64(cat->files[i].outpoint, cat->files[i].inpoint) + ) break; cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint; } |