[FFmpeg-cvslog] swscale/yuv2rgb: Increase YUV2RGB table headroom

[Michael Niedermayer]

ffmpeg | branch: release/2.5 | Michael Niedermayer <michael at niedermayer.cc> | Thu Jan 14 03:05:11 2016 +0100| [dc6a9162a2d26b4fea089e00bd574f67d9ee4e91] | committer: Michael Niedermayer

swscale/yuv2rgb: Increase YUV2RGB table headroom

This makes SWS more robust
Fixes: 07650a772d98aa63b0fed6370dc89037/asan_heap-oob_27ddeaf_2657_2c81ff264dee5d9712cb3251fb9c3bbb.264
Fixes: out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 8f3a9a8c278acf886f70a1d743bc07b6f9c7b51a)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dc6a9162a2d26b4fea089e00bd574f67d9ee4e91
---

 libswscale/swscale_internal.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index b1a5072..a3e7e26 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -39,8 +39,8 @@
 
 #define STR(s) AV_TOSTRING(s) // AV_STRINGIFY is too long
 
-#define YUVRGB_TABLE_HEADROOM 256
-#define YUVRGB_TABLE_LUMA_HEADROOM 0
+#define YUVRGB_TABLE_HEADROOM 512
+#define YUVRGB_TABLE_LUMA_HEADROOM 512
 
 #define MAX_FILTER_SIZE SWS_MAX_FILTER_SIZE