[FFmpeg-cvslog] h264: check chroma_format_idc range.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Thu Dec 15 02:43:03 2011 +0100| [7fff64e00d886fde11d61958888c82b461cf99b9] | committer: Michael Niedermayer

h264: check chroma_format_idc range.
Fixes Ticket758
Bug found by: Diana Elena Muscalu

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7fff64e00d886fde11d61958888c82b461cf99b9
---

 libavcodec/h264_ps.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/libavcodec/h264_ps.c b/libavcodec/h264_ps.c
index 3184cad..f879576 100644
--- a/libavcodec/h264_ps.c
+++ b/libavcodec/h264_ps.c
@@ -347,6 +347,10 @@ int ff_h264_decode_seq_parameter_set(H264Context *h){
 
     if(sps->profile_idc >= 100){ //high profile
         sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
+        if (sps->chroma_format_idc > 3U) {
+            av_log(h->s.avctx, AV_LOG_ERROR, "chroma_format_idc %d is illegal\n", sps->chroma_format_idc);
+            goto fail;
+        }
         if(sps->chroma_format_idc == 3)
             sps->residual_color_transform_flag = get_bits1(&s->gb);
         sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;