From 01215b8519c70e500cf43b2362cee6eb504b450f Mon Sep 17 00:00:00 2001
From: Marc-Philip <marc-philip.werner@sap.com>
Date: Mon, 19 Jun 2017 13:02:26 +0200
Subject: [PATCH] fix possible overrun

---
 src/unix/utilsunx.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index efb3044325..6dd2e9927e 100644
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -1209,7 +1209,12 @@ wxMemorySize wxGetFreeMemory()
                     {
                         unsigned long cached;
                         if ( sscanf(buf, "Cached: %lu", &cached) == 1 )
-                            memFree += cached;
+                        {
+                            if ( cached > ULONG_MAX-memFree )
+                                memFree = ULONG_MAX;
+                            else
+                                memFree += cached;
+                        }
                     }
 
                     // values here are always expressed in kB and we want bytes