File ffmpeg-CVE-2020-22022.patch of Package ffmpeg.32491

From 07050d7bdc32d82e53ee5bb727f5882323d00dba Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 13 Oct 2019 23:10:16 +0200
Subject: [PATCH] avfilter/vf_fieldorder: fix heap-buffer overflow

Fixes #8264
---
 libavfilter/vf_fieldorder.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/vf_fieldorder.c b/libavfilter/vf_fieldorder.c
index ca55ff1f66..5707151f1b 100644
--- a/libavfilter/vf_fieldorder.c
+++ b/libavfilter/vf_fieldorder.c
@@ -108,8 +108,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
             s->dst_tff ? "up" : "down");
     h = frame->height;
     for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++) {
-        dst_line_step = out->linesize[plane];
-        src_line_step = frame->linesize[plane];
+        dst_line_step = out->linesize[plane] * (h > 2);
+        src_line_step = frame->linesize[plane] * (h > 2);
         line_size = s->line_size[plane];
         dst = out->data[plane];
         src = frame->data[plane];
-- 
2.31.1