[FFmpeg-cvslog] swscale/swscale_unscaled: Fix odd height inputs for bayer_to_yv12_wrapper( )

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sun Jan 17 00:55:44 2016 +0100| [6eb76b34ca24deabc42b17d2f8fb8b407d20942f] | committer: Michael Niedermayer

swscale/swscale_unscaled: Fix odd height inputs for bayer_to_yv12_wrapper()

Fixes: 372d2df1f04b49e25f109f07f90b1505/asan_heap-oob_2835d2e_8501_99e0114d7ba3a6db885d0b4684d200c1.cine
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 757248ea3cd917a7755cb15f817a9b1f15578718)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6eb76b34ca24deabc42b17d2f8fb8b407d20942f
---

 libswscale/swscale_unscaled.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libswscale/swscale_unscaled.c b/libswscale/swscale_unscaled.c
index 9fb8816..6d9a8dc 100644
--- a/libswscale/swscale_unscaled.c
+++ b/libswscale/swscale_unscaled.c
@@ -1110,6 +1110,8 @@ static int bayer_to_yv12_wrapper(SwsContext *c, const uint8_t* src[], int srcStr
     default: return 0;
     }
 
+    av_assert0(srcSliceH > 1);
+
     copy(srcPtr, srcStride[0], dstY, dstU, dstV, dstStride[0], c->srcW, c->input_rgb2yuv_table);
     srcPtr += 2 * srcStride[0];
     dstY   += 2 * dstStride[0];
@@ -1124,7 +1126,10 @@ static int bayer_to_yv12_wrapper(SwsContext *c, const uint8_t* src[], int srcStr
         dstV   +=     dstStride[1];
     }
 
-    copy(srcPtr, srcStride[0], dstY, dstU, dstV, dstStride[0], c->srcW, c->input_rgb2yuv_table);
+    if (i + 1 == srcSliceH) {
+        copy(srcPtr, -srcStride[0], dstY, dstU, dstV, -dstStride[0], c->srcW, c->input_rgb2yuv_table);
+    } else if (i < srcSliceH)
+        copy(srcPtr, srcStride[0], dstY, dstU, dstV, dstStride[0], c->srcW, c->input_rgb2yuv_table);
     return srcSliceH;
 }