From 1ad92dca28b0e83ad54d904719c898c8a30b7d99 Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Thu, 25 Oct 2018 17:02:59 +0100
Subject: [PATCH] super_node: fix nullptr dereference if no config was loaded

---
 lib/super_node.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/super_node.cpp b/lib/super_node.cpp
index 3e7322dc2..f9d8ee9af 100644
--- a/lib/super_node.cpp
+++ b/lib/super_node.cpp
@@ -51,7 +51,8 @@ SuperNode::SuperNode() :
 	hugepages(DEFAULT_NR_HUGEPAGES),
 	stats(0),
 	api(this),
-	web(&api)
+	web(&api),
+	json(nullptr)
 {
 	list_init(&nodes);
 	list_init(&paths);
@@ -467,7 +468,8 @@ SuperNode::~SuperNode()
 	list_destroy(&paths,   (dtor_cb_t) path_destroy, true);
 	list_destroy(&nodes,   (dtor_cb_t) node_destroy, true);
 
-	json_decref(json);
+	if (json)
+		json_decref(json);
 }
 
 int SuperNode::periodic()