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h264: check for luma and chroma bit depth being equal 

The decoder assumes a single bit depth for all the planes while
the specification allows different bit depths for luma and chroma.

Avoid the possible problems described in CVE-2013-2277

Conflicts:
	libavcodec/h264.c
This commit is contained in:
Reinhard Tartler 2013-05-07 07:25:10 +02:00
parent 7e6625a9af
commit 7d4c38d58d
1 changed files with 6 additions and 0 deletions
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6
libavcodec/h264.c
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@ -3867,6 +3867,12 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
if(avctx->has_b_frames < 2)
avctx->has_b_frames= !s->low_delay;
if (h->sps.bit_depth_luma != h->sps.bit_depth_chroma) {
av_log_missing_feature(s->avctx,
"Different bit depth between chroma and luma", 1);
return AVERROR_PATCHWELCOME;
}
if (avctx->bits_per_raw_sample != h->sps.bit_depth_luma) {
if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 10) {
avctx->bits_per_raw_sample = h->sps.bit_depth_luma;