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From 1fb07b9524b4afed3a826c087db4dc48a7bfdb89 Mon Sep 17 00:00:00 2001
From: Ted Lemon <elemon@apple.com>
Date: Thu, 6 Jun 2019 13:35:43 -0400
Subject: [PATCH] Fix core dump while parsing interface list on Posix
---
--- a/mDNSPosix/mDNSPosix.c
+++ b/mDNSPosix/mDNSPosix.c
@@ -1320,7 +1320,8 @@ mDNSlocal int SetupInterfaceList(mDNS *c
struct ifaddrs *i = intfList;
while (i)
{
- if ( ((i->ifa_addr->sa_family == AF_INET)
+ if ( i->ifa_addr != NULL &&
+ ((i->ifa_addr->sa_family == AF_INET)
#if HAVE_IPV6
|| (i->ifa_addr->sa_family == AF_INET6)
#endif
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