From: Guus Sliepen <guus@meshlink.io>
Date: Fri, 10 Jul 2020 20:15:39 +0000 (+0200)
Subject: Fix a crash with some network configurations.
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=c8af33c1b1b25dc5e9b42892e09dbb65fd5bd766;p=meshlink

Fix a crash with some network configurations.

It is apparently possible for getifaddrs() to return a struct ifaddrs that
contains a NULL ifa_addr pointer.
---

diff --git a/src/meshlink.c b/src/meshlink.c
index 0fe7343c..d54fe30b 100644
--- a/src/meshlink.c
+++ b/src/meshlink.c
@@ -366,7 +366,7 @@ char *meshlink_get_local_address_for_family(meshlink_handle_t *mesh, int family)
 		for(struct ifaddrs *ifap = ifa; ifap; ifap = ifap->ifa_next) {
 			sockaddr_t *sa = (sockaddr_t *)ifap->ifa_addr;
 
-			if(sa->sa.sa_family != family) {
+			if(!sa || sa->sa.sa_family != family) {
 				continue;
 			}