From d674bf720fe6fce9f91e8d3d1a758835805617c7 Mon Sep 17 00:00:00 2001
From: Ad Schellevis <ad@opnsense.org>
Date: Mon, 26 Jun 2023 11:42:56 +0200
Subject: [PATCH] MVC / Backend - fix "escapeshellarg(): Passing null to
 parameter #1 ($arg) .."

---
 src/opnsense/mvc/app/library/OPNsense/Core/Backend.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/opnsense/mvc/app/library/OPNsense/Core/Backend.php b/src/opnsense/mvc/app/library/OPNsense/Core/Backend.php
index 850e15ef9..5bd193d38 100644
--- a/src/opnsense/mvc/app/library/OPNsense/Core/Backend.php
+++ b/src/opnsense/mvc/app/library/OPNsense/Core/Backend.php
@@ -169,7 +169,7 @@ class Backend
         }
 
         foreach ($params as $param) {
-            $event .= ' ' . escapeshellarg($param);
+            $event .= ' ' . escapeshellarg($param ?? '');
         }
 
         return $this->configdRun($event, $detach, $timeout, $connect_timeout);