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h264: check that an IDR NAL only contains I slices

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
This commit is contained in:
Anton Khirnov 2013-11-28 10:54:35 +01:00
parent 9ecabd7892
commit 8b2e5e42bb
1 changed files with 6 additions and 0 deletions
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6
libavcodec/h264.c
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@ -3383,6 +3383,12 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
h->slice_type = slice_type;
h->slice_type_nos = slice_type & 3;
if (h->nal_unit_type == NAL_IDR_SLICE &&
h->slice_type_nos != AV_PICTURE_TYPE_I) {
av_log(h->avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
return AVERROR_INVALIDDATA;
}
// to make a few old functions happy, it's wrong though
h->pict_type = h->slice_type;