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hevc: check that VPS referenced from SPS exists 

This matches how its done for SPS/PPS.
Fixes null pointer dereference.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Michael Niedermayer 2014-01-10 21:32:04 +01:00 committed by Luca Barbato
parent dd2d0039b6
commit a7a07cc98a
1 changed files with 7 additions and 0 deletions
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7
libavcodec/hevc_ps.c
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@ -633,6 +633,13 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
goto err;
}
if (!s->vps_list[sps->vps_id]) {
av_log(s->avctx, AV_LOG_ERROR, "VPS %d does not exist\n",
sps->vps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
sps->max_sub_layers = get_bits(gb, 3) + 1;
if (sps->max_sub_layers > MAX_SUB_LAYERS) {
av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",