From ac6eec1fc258efce219e4fccb84312a1b13a7a23 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Thu, 12 Jan 2023 23:42:59 +0100
Subject: [PATCH] avcodec/motionpixels: Mask pixels to valid values
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@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)