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| author | Michael Niedermayer <michael@niedermayer.cc> | 2024-03-26 00:16:39 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2024-03-26 23:25:35 +0100 |
| commit | 007486058c2eb7a7518450a2ddb4fa98845887a3 (patch) | |
| tree | f1e5b732898b257c3ad5ff9a922b145b00915d3d | |
| parent | 1eb8cbd09c5f22d7ba9e0d443712a6ab80648637 (diff) | |
| download | ffmpeg-007486058c2eb7a7518450a2ddb4fa98845887a3.tar.gz | |
avformat/concatdec: Check user_duration sum
Fixes: 62276/clusterfuzz-testcase-minimized-ffmpeg_dem_CONCAT_fuzzer-6434245599690752
Fixes: signed integer overflow: 9223372026773000000 + 22337000000 cannot be represented in type 'long'
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/concatdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c index 6017c2c76b..b1d0de18f1 100644 --- a/libavformat/concatdec.c +++ b/libavformat/concatdec.c @@ -679,6 +679,8 @@ static int concat_read_header(AVFormatContext *avf) cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint; } cat->files[i].duration = cat->files[i].user_duration; + if (time + (uint64_t)cat->files[i].user_duration > INT64_MAX) + return AVERROR_INVALIDDATA; time += cat->files[i].user_duration; } if (i == cat->nb_files) { |