From 1cc54320306e07c1fc0eed98e7fbcbb07a2f3b28 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Fri, 23 Jun 2023 10:10:00 +0200 Subject: [PATCH] Handle interface without `ifa_addr` It seems that certain interface types may have `ifa_addr` set to null. Handle this case gracefully. Upstream-Status: Submitted [https://github.com/apple-oss-distributions/mDNSResponder/pull/2/commits/11b410d4d683c90e693c40315997bb3e8ec90e9a] Signed-off-by: Stefan Agner Signed-off-by: Alex Kiernan --- mDNSPosix/mDNSPosix.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Index: mDNSResponder/mDNSPosix/mDNSPosix.c =================================================================== --- mDNSResponder.orig/mDNSPosix/mDNSPosix.c +++ mDNSResponder/mDNSPosix/mDNSPosix.c @@ -1895,6 +1895,7 @@ mDNSlocal void InterfaceChangeCallback(i continue; if ((ifa_loop4 == NULL) && + ((*ifi)->ifa_addr != NULL) && ((*ifi)->ifa_addr->sa_family == AF_INET) && ((*ifi)->ifa_flags & IFF_UP) && ((*ifi)->ifa_flags & IFF_LOOPBACK)) @@ -1903,7 +1904,8 @@ mDNSlocal void InterfaceChangeCallback(i continue; } - if ( (((*ifi)->ifa_addr->sa_family == AF_INET) + if ( ((*ifi)->ifa_addr != NULL) && + (((*ifi)->ifa_addr->sa_family == AF_INET) #if HAVE_IPV6 || ((*ifi)->ifa_addr->sa_family == AF_INET6) #endif