From 3b17de3424464875aabd5b37c055e11fb63bd6c9 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 8 Nov 2012 08:38:10 -0500
Subject: [PATCH] SystemInformation: Do not dereference NULL ifa_addr
From "man getifaddrs":
"This means ifa_addr and other fields can actually be NULL if the
interface has no address..."
Reported-by: Kornel Benko <kornel@lyx.org>
Change-Id: I9d9ad3ae9fb50cbcab46fa8c06b270e4c56c288e
---
SystemInformation.cxx | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/SystemInformation.cxx b/SystemInformation.cxx
index 6b63b94..6d990a9 100644
--- a/SystemInformation.cxx
+++ b/SystemInformation.cxx
@@ -1323,7 +1323,7 @@ int SystemInformationImplementation::GetFullyQualifiedDomainName(
for (ifa=ifas; ifa!=NULL; ifa=ifa->ifa_next)
{
- int fam=ifa->ifa_addr->sa_family;
+ int fam = ifa->ifa_addr? ifa->ifa_addr->sa_family : -1;
if ((fam==AF_INET) || (fam==AF_INET6))
{
char host[NI_MAXHOST]={'\0'};
--
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