File ffmpeg-CVE-2020-20895.patch of Package ffmpeg.27460
From f069a9c2a65bc20c3462127623127df6dfd06c5b Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Tue, 15 Oct 2019 16:31:15 +0200
Subject: [PATCH] avfilter/vf_avgblur: fix heap-buffer overflow
Fixes #8274
---
libavfilter/vf_avgblur.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavfilter/vf_avgblur.c b/libavfilter/vf_avgblur.c
index 40b48799e0..78a6806e6f 100644
--- a/libavfilter/vf_avgblur.c
+++ b/libavfilter/vf_avgblur.c
@@ -148,7 +148,7 @@ static int filter_vertically_##name(AVFilterContext *ctx, void *arg, int jobnr,
\
src = s->buffer + x; \
ptr = buffer + x; \
- for (i = 0; i <= radius; i++) { \
+ for (i = 0; i + radius < height && i <= radius; i++) { \
acc += src[(i + radius) * width]; \
count++; \
ptr[i * linesize] = acc / count; \
--
2.33.0