[FFmpeg-cvslog] avcodec/utils: Enforce minimum width also for VP5/6

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Wed Apr 11 19:50:52 2018 +0200| [9af1e014f788a9c8700c4415130475f27a35e3db] | committer: Michael Niedermayer

avcodec/utils: Enforce minimum width also for VP5/6

Fixes: out of array access
Fixes: poc_0411

Found-by: GwanYeong Kim <gy741.kim at gmail.com>
Tested-by: GwanYeong Kim <gy741.kim at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 544324827e0131e43af1a54fb790a48a25fd7ba4)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9af1e014f788a9c8700c4415130475f27a35e3db
---

 libavcodec/utils.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 6f54f530a1..1f3768dc0f 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -420,7 +420,10 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
 
     *width  = FFALIGN(*width, w_align);
     *height = FFALIGN(*height, h_align);
-    if (s->codec_id == AV_CODEC_ID_H264 || s->lowres) {
+    if (s->codec_id == AV_CODEC_ID_H264 || s->lowres ||
+        s->codec_id == AV_CODEC_ID_VP5  || s->codec_id == AV_CODEC_ID_VP6 ||
+        s->codec_id == AV_CODEC_ID_VP6F || s->codec_id == AV_CODEC_ID_VP6A
+    ) {
         // some of the optimized chroma MC reads one line too much
         // which is also done in mpeg decoders with lowres > 0
         *height += 2;