[FFmpeg-cvslog] avcodec/hevc_ps: Check chroma_format_idc

[Michael Niedermayer]

ffmpeg | branch: release/2.7 | Michael Niedermayer <michael at niedermayer.cc> | Thu Nov  5 14:52:33 2015 +0100| [d332aa6ec678e5e9630710a049eee36a91127f8c] | committer: Michael Niedermayer

avcodec/hevc_ps: Check chroma_format_idc

Fixes out of array access
Fixes: 24d05e8b84676799c735c9e27d97895e/asan_heap-oob_1b70f6a_2955_7c3652a7f370f9f3ef40642bc2c99bb2.bit

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 93f30f825c08477fe8f76be00539e96014cc83c8)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d332aa6ec678e5e9630710a049eee36a91127f8c
---

 libavcodec/hevc_ps.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
index 757f666..05d9cd6 100644
--- a/libavcodec/hevc_ps.c
+++ b/libavcodec/hevc_ps.c
@@ -806,6 +806,9 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
     }
 
     sps->chroma_format_idc = get_ue_golomb_long(gb);
+    if (sps->chroma_format_idc > 3U) {
+        return AVERROR_INVALIDDATA;
+    }
 
     if (sps->chroma_format_idc == 3)
         sps->separate_colour_plane_flag = get_bits1(gb);