[NETNS]: Disable inetaddr notifiers in namespaces other than initial.

ip_fib_init is kept enabled. It is already namespace-aware.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/protocol.c

@@ -629,6 +629,9 @@ static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
 	struct sctp_sockaddr_entry *addr = NULL;
 	struct sctp_sockaddr_entry *temp;
 
+	if (ifa->ifa_dev->dev->nd_net != &init_net)
+		return NOTIFY_DONE;
+
 	switch (ev) {
 	case NETDEV_UP:
 		addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC);