| From 1cc54320306e07c1fc0eed98e7fbcbb07a2f3b28 Mon Sep 17 00:00:00 2001 |
| From: Stefan Agner <stefan@agner.ch> |
| 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 <stefan@agner.ch> |
| Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> |
| --- |
| mDNSPosix/mDNSPosix.c | 4 +++- |
| 1 file changed, 3 insertions(+), 1 deletion(-) |
| |
| diff --git a/mDNSPosix/mDNSPosix.c b/mDNSPosix/mDNSPosix.c |
| index d7f31cc4d5cf..f10301253f58 100644 |
| --- a/mDNSPosix/mDNSPosix.c |
| +++ b/mDNSPosix/mDNSPosix.c |
| @@ -1895,6 +1895,7 @@ mDNSlocal void InterfaceChangeCallback(int fd, void *context) |
| 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(int fd, void *context) |
| 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 |