From a9dffb94387ea84013d23b032092592dca02a58c Mon Sep 17 00:00:00 2001
From: Thulinma <jaron@vietors.com>
Date: Wed, 20 Jul 2016 14:56:04 +0200
Subject: [PATCH] Added check for invalid handle to config storage

---
 src/controller/controller_storage.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/controller/controller_storage.cpp b/src/controller/controller_storage.cpp
index 89a271eb..35e54e6f 100644
--- a/src/controller/controller_storage.cpp
+++ b/src/controller/controller_storage.cpp
@@ -99,6 +99,10 @@ namespace Controller {
     if (!changed){return;}//cancel further processing if no changes
 
     static IPC::sharedPage mistConfOut(SHM_CONF, DEFAULT_CONF_PAGE_SIZE, true);
+    if (!mistConfOut.mapped){
+      FAIL_MSG("Could not open config shared memory storage for writing! Is shared memory enabled on your system?");
+      return;
+    }
     IPC::semaphore configLock(SEM_CONF, O_CREAT | O_RDWR, ACCESSPERMS, 1);
     //lock semaphore
     configLock.wait();