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h264: check for luma and chroma bit dept being equal

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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

CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2013-03-04 11:21:08 +01:00
parent c57a593670
commit 4987faee78
1 changed files with 6 additions and 0 deletions
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6
libavcodec/h264.c
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@ -2745,6 +2745,12 @@ static int h264_set_parameter_from_sps(H264Context *h)
if (h->avctx->has_b_frames < 2) if (h->avctx->has_b_frames < 2)
h->avctx->has_b_frames = !h->low_delay; h->avctx->has_b_frames = !h->low_delay;
if (h->sps.bit_depth_luma != h->sps.bit_depth_chroma) {
av_log_missing_feature(h->avctx,
"Different bit depth between chroma and luma", 1);
return AVERROR_PATCHWELCOME;
}
if (h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma || if (h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
h->cur_chroma_format_idc != h->sps.chroma_format_idc) { h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
if (h->avctx->codec && if (h->avctx->codec &&