From a8f5ed3ff337bce5222967fdf8c0b475fd28e74a Mon Sep 17 00:00:00 2001
From: John Light <john.j.light@intel.com>
Date: Thu, 30 Jul 2015 15:14:07 -0700
Subject: [PATCH] Avoid Segv by testing address field before using it.

sIssue reported off dev list by Gabriel Schulhof.

Change-Id: Ifa529da59fb784fd5cdef6ca333635cf99ed1f59
Signed-off-by: John Light <john.j.light@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2160
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>
---
 .../src/ip_adapter/linux/caipnwmonitor.c           |    4 ++++
 1 file changed, 4 insertions(+)

--- a/resource/csdk/connectivity/src/ip_adapter/linux/caipnwmonitor.c
+++ b/resource/csdk/connectivity/src/ip_adapter/linux/caipnwmonitor.c
@@ -57,6 +57,10 @@ u_arraylist_t *CAIPGetInterfaceInformati
     struct ifaddrs *ifa = NULL;
     for (ifa = ifp; ifa; ifa = ifa->ifa_next)
     {
+        if (!ifa->ifa_addr)
+        {
+            continue;
+        }
         int family = ifa->ifa_addr->sa_family;
         if ((ifa->ifa_flags & IFF_LOOPBACK) || (AF_INET != family && AF_INET6 != family))
         {