Phonet: do not dump addresses from other namespaces

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/phonet/pn_netlink.c

@@ -123,6 +123,7 @@ nla_put_failure:
 
 static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
 {
+	struct net *net = sock_net(skb->sk);
 	struct phonet_device *pnd;
 	int dev_idx = 0, dev_start_idx = cb->args[0];
 	int addr_idx = 0, addr_start_idx = cb->args[1];
@@ -131,6 +132,8 @@ static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
 	list_for_each_entry(pnd, &pndevs.list, list) {
 		u8 addr;
 
+		if (!net_eq(dev_net(pnd->netdev), net))
+			continue;
 		if (dev_idx > dev_start_idx)
 			addr_start_idx = 0;
 		if (dev_idx++ < dev_start_idx)