Commit 4987faee authored by Luca Barbato's avatar Luca Barbato

h264: check for luma and chroma bit dept 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

CC: libav-stable@libav.org
parent c57a5936
......@@ -2745,6 +2745,12 @@ static int h264_set_parameter_from_sps(H264Context *h)
if (h->avctx->has_b_frames < 2)
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 ||
h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
if (h->avctx->codec &&
......
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