[FFmpeg-devel] [PATCH 4/5] avcodec/motionpixels: Mask pixels to valid values

[Michael Niedermayer]

Fixes: out of array access
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOTIONPIXELS_fuzzer-6724203352555520

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavcodec/motionpixels.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/motionpixels.c b/libavcodec/motionpixels.c
index 4141c5a495..a947ca05de 100644
--- a/libavcodec/motionpixels.c
+++ b/libavcodec/motionpixels.c
@@ -185,7 +185,7 @@ static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
     int color;
 
     color = *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
-    return mp_rgb_yuv_table[color];
+    return mp_rgb_yuv_table[color & 0x7FFF];
 }
 
 static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
-- 
2.17.1