[LLC]: Fix sap refcounting

Thanks to Leslie Harlley Watter <leslie@watter.org> for reporting the
problem an testing this patch.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/llc/af_llc.c

@@ -187,8 +187,10 @@ static int llc_ui_release(struct socket *sock)
 		llc->laddr.lsap, llc->daddr.lsap);
 	if (!llc_send_disc(sk))
 		llc_ui_wait_for_disc(sk, sk->sk_rcvtimeo);
-	if (!sock_flag(sk, SOCK_ZAPPED))
+	if (!sock_flag(sk, SOCK_ZAPPED)) {
+		llc_sap_put(llc->sap);
 		llc_sap_remove_socket(llc->sap, sk);
+	}
 	release_sock(sk);
 	if (llc->dev)
 		dev_put(llc->dev);

net/llc/llc_core.c

@@ -127,7 +127,6 @@ struct llc_sap *llc_sap_open(unsigned char lsap,
 		goto out;
 	sap->laddr.lsap = lsap;
 	sap->rcv_func	= func;
-	llc_sap_hold(sap);
 	llc_add_sap(sap);
 out:
 	write_unlock_bh(&llc_sap_list_lock);