Check ifa->ifa_addr otherwise existing TUN device causes following segfault;

[util-vserver-pl.git] / python / vserverimpl.c

diff --git a/python/vserverimpl.c b/python/vserverimpl.c
index c1725f3..1f0d913 100644 (file)
--- a/python/vserverimpl.c
+++ b/python/vserverimpl.c
@@ -401,7 +401,7 @@ get_mask(struct vc_net_addr *addr)
   if (getifaddrs(&head) == -1)
     return -1;
   for (ifa = head; ifa; ifa = ifa->ifa_next) {
-    if (ifa->ifa_addr->sa_family == family &&
+    if (ifa->ifa_addr && ifa->ifa_addr->sa_family == family &&
         memcmp((char *) ifa->ifa_addr + offset, ip, len) == 0) {
       switch (addr->vna_type) {
       case VC_NXA_TYPE_IPV4: