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avformat/mov: Check STCO location
Fixes: bypassing of checks and assertion failure Fixes: asan_1003879.mp4 Found-by: Clusterfuzz + asan Reported-by: Thomas Guilbert <tguilbert@google.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1978,6 +1978,10 @@ static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
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MOVStreamContext *sc;
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unsigned int i, entries;
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if (c->trak_index < 0) {
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av_log(c->fc, AV_LOG_WARNING, "STCO outside TRAK\n");
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return 0;
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}
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if (c->fc->nb_streams < 1)
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return 0;
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st = c->fc->streams[c->fc->nb_streams-1];
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