On Mon, Jan 6, 2014 at 8:36 AM, Anton Khirnov <[email protected]> wrote:
> Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
> CC:[email protected]
> ---
>  libavcodec/h264.c |    6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/libavcodec/h264.c b/libavcodec/h264.c
> index 6f329aa..4b10a68 100644
> --- a/libavcodec/h264.c
> +++ b/libavcodec/h264.c
> @@ -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;
>

"When nal_unit_type is equal to 5 (IDR picture), slice_type shall be
equal to 2, 4, 7, or 9."
So, patch definitely OK.
Vittorio
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