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avcodec/hevc_ps: check that VPS referenced from SPS exists 

This matches how its done for SPS/PPS.
An alternative to this is to check it when its used.

Fixes null pointer dereference
Fixes: signal_sigsegv_e30a43_1437_CIP_A_Panasonic_3.bit
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-01-06 02:51:20 +01:00
parent 4816d63fb7
commit d66bab0a69
1 changed files with 6 additions and 0 deletions
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6
libavcodec/hevc_ps.c
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@ -635,6 +635,12 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
goto err; goto err;
} }
if (!s->vps_list[sps->vps_id]) {
av_log(s->avctx, AV_LOG_ERROR, "VPS does not exist \n");
ret = AVERROR_INVALIDDATA;
goto err;
}
sps->max_sub_layers = get_bits(gb, 3) + 1; sps->max_sub_layers = get_bits(gb, 3) + 1;
if (sps->max_sub_layers > MAX_SUB_LAYERS) { if (sps->max_sub_layers > MAX_SUB_LAYERS) {
av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n", av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",