From 85b59270837f90f4d737ca88ca9520d440fd6884 Mon Sep 17 00:00:00 2001
From: Zhao Zhili <zhilizhao@tencent.com>
Date: Tue, 23 Dec 2025 01:10:31 +0800
Subject: [PATCH] avfilter/vf_libopencv: fix null pointer dereference

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
---
 libavfilter/vf_libopencv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavfilter/vf_libopencv.c b/libavfilter/vf_libopencv.c
index 06a2954bc6..c125d294d1 100644
--- a/libavfilter/vf_libopencv.c
+++ b/libavfilter/vf_libopencv.c
@@ -294,6 +294,8 @@ static av_cold void dilate_uninit(AVFilterContext *ctx)
     OCVContext *s = ctx->priv;
     DilateContext *dilate = s->priv;
 
+    if (!dilate)
+        return;
     cvReleaseStructuringElement(&dilate->kernel);
 }