From f8644e1f1fe89c06ed80db6b4a1e66d71b9c9a13 Mon Sep 17 00:00:00 2001
From: Jim Tittsler <jimt@onjapan.net>
Date: Fri, 5 Nov 2021 13:07:07 +0900
Subject: [PATCH] fix Linux AF_INET iteration segfault

Prevent segfault when WireGuard is active and an interface has `ifaptr->ifa_addr == NULL`
---
 src/creflector.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/creflector.cpp b/src/creflector.cpp
index 1f5e65b..a813df9 100644
--- a/src/creflector.cpp
+++ b/src/creflector.cpp
@@ -790,7 +790,7 @@ bool CReflector::UpdateListenMac(void)
         for ( ifaptr = ifap; (ifaptr != NULL) && !found; ifaptr = (ifaptr)->ifa_next )
         {
             // is it an AF_INET?
-            if ( ifaptr->ifa_addr->sa_family == AF_INET )
+            if ( ifaptr->ifa_addr && ifaptr->ifa_addr->sa_family == AF_INET )
             {
                 if (ifaptr->ifa_addr == NULL)
                     continue;