[FFmpeg-cvslog] avcodec/h264dec: Fix potential array overread

[Michael Niedermayer]

ffmpeg | branch: release/3.4 | Michael Niedermayer <michael at niedermayer.cc> | Sat Oct 21 18:04:44 2017 +0200| [d25736dc871b46f9e22e6b23b4b8e131e685a9c4] | committer: Michael Niedermayer

avcodec/h264dec: Fix potential array overread

add padding before scantable arrays

See: 522d850e68ec4b77d3477b3c8f55b1ba00a9d69a

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 380b48fb9fdc7b0c40d67e026f9b3accb12794eb)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d25736dc871b46f9e22e6b23b4b8e131e685a9c4
---

 libavcodec/h264dec.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/h264dec.h b/libavcodec/h264dec.h
index 2106ba077e..de8b7c38b9 100644
--- a/libavcodec/h264dec.h
+++ b/libavcodec/h264dec.h
@@ -416,6 +416,7 @@ typedef struct H264Context {
     uint8_t (*mvd_table[2])[2];
     uint8_t *direct_table;
 
+    uint8_t scan_padding[16];
     uint8_t zigzag_scan[16];
     uint8_t zigzag_scan8x8[64];
     uint8_t zigzag_scan8x8_cavlc[64];