From d4d6b7b0355f3597cad3b8d12911790c73b5f96d Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sat, 19 Oct 2019 09:50:53 +0200
Subject: [PATCH] avfilter/vf_datascope: fix heap buffer overflow

Fixes #8309
---
 libavfilter/vf_datascope.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_datascope.c b/libavfilter/vf_datascope.c
index c9039a60f6..83f90f07ba 100644
--- a/libavfilter/vf_datascope.c
+++ b/libavfilter/vf_datascope.c
@@ -973,7 +973,7 @@ static int oscilloscope_filter_frame(AVFilterLink *inlink, AVFrame *frame)
                        frame->width, frame->height,
                        s->ox, s->oy, s->width, s->height + 20 * s->statistics);
 
-    if (s->grid) {
+    if (s->grid && outlink->h >= 10) {
         ff_fill_rectangle(&s->draw, &s->gray, frame->data, frame->linesize,
                           s->ox, s->oy, s->width - 1, 1);