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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-15 20:41:31 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-16 19:02:24 +0100 |
| commit | 1d277b92fa4c149d589e6828d4e18ad578406f1f (patch) | |
| tree | b37766e8faa9f37176eecb1cb4ad38e0808b6bd5 | |
| parent | 6a797ceafe2a96aa1682a1eca421eddd4c498275 (diff) | |
| download | ffmpeg-1d277b92fa4c149d589e6828d4e18ad578406f1f.tar.gz | |
avformat/mov: Check element count in mov_metadata_hmmt()
Fixes: Timeout
Fixes: 30325/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6048395703746560
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/mov.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c index 9ca0a3ee15..2a701e9f70 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -288,6 +288,8 @@ static int mov_metadata_hmmt(MOVContext *c, AVIOContext *pb, unsigned len) return 0; n_hmmt = avio_rb32(pb); + if (n_hmmt > len / 4) + return AVERROR_INVALIDDATA; for (i = 0; i < n_hmmt && !pb->eof_reached; i++) { int moment_time = avio_rb32(pb); avpriv_new_chapter(c->fc, i, av_make_q(1, 1000), moment_time, AV_NOPTS_VALUE, NULL); |