[RTNETLINK]: Fix use of wrong skb in do_getlink()

skb is the netlink query, nskb is the reply message.

Signed-off-by: Patrick McHardy <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/core/rtnetlink.c

···
 		goto errout;
 	}
 
-	err = rtnl_unicast(skb, NETLINK_CB(skb).pid);
+	err = rtnl_unicast(nskb, NETLINK_CB(skb).pid);
 errout:
 	kfree(iw_buf);
 	dev_put(dev);