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h261: check the mtype index

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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2013-08-14 16:57:21 +02:00
parent f399e406af
commit c59967fa7c
1 changed files with 5 additions and 0 deletions
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5
libavcodec/h261dec.c
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@ -376,6 +376,11 @@ static int h261_decode_mb(H261Context *h)
// Read mtype
h->mtype = get_vlc2(&s->gb, h261_mtype_vlc.table, H261_MTYPE_VLC_BITS, 2);
if (h->mtype < 0 || h->mtype >= FF_ARRAY_ELEMS(ff_h261_mtype_map)) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid mtype index %d\n",
h->mtype);
return SLICE_ERROR;
}
h->mtype = ff_h261_mtype_map[h->mtype];
// Read mquant