mirror of https://git.ffmpeg.org/ffmpeg.git
mpc8: check stream count before accessing stream 1.
Fixes null pointer dereference Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -139,6 +139,11 @@ static void mpc8_parse_seektable(AVFormatContext *s, int64_t off)
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int i, t, seekd;
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int i, t, seekd;
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GetBitContext gb;
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GetBitContext gb;
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if (s->nb_streams<=0) {
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av_log(s, AV_LOG_ERROR, "cannot parse stream table before stream header\n");
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return;
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}
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avio_seek(s->pb, off, SEEK_SET);
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avio_seek(s->pb, off, SEEK_SET);
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mpc8_get_chunk_header(s->pb, &tag, &size);
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mpc8_get_chunk_header(s->pb, &tag, &size);
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if(tag != TAG_SEEKTABLE){
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if(tag != TAG_SEEKTABLE){
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