3 files changed, 36 insertions, 11 deletions

diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index fc8ad001bc94..d61da9ece3ba 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -443,9 +443,14 @@ static ssize_t ppp_read(struct file *file, char __user *buf,
 			 * network traffic (demand mode).
 			 */
 			struct ppp *ppp = PF_TO_PPP(pf);
+
+			ppp_recv_lock(ppp);
 			if (ppp->n_channels == 0 &&
-			    (ppp->flags & SC_LOOP_TRAFFIC) == 0)
+			    (ppp->flags & SC_LOOP_TRAFFIC) == 0) {
+				ppp_recv_unlock(ppp);
 				break;
+			}
+			ppp_recv_unlock(ppp);
 		}
 		ret = -EAGAIN;
 		if (file->f_flags & O_NONBLOCK)
@@ -532,9 +537,12 @@ static unsigned int ppp_poll(struct file *file, poll_table *wait)
 	else if (pf->kind == INTERFACE) {
 		/* see comment in ppp_read */
 		struct ppp *ppp = PF_TO_PPP(pf);
+
+		ppp_recv_lock(ppp);
 		if (ppp->n_channels == 0 &&
 		    (ppp->flags & SC_LOOP_TRAFFIC) == 0)
 			mask |= POLLIN | POLLRDNORM;
+		ppp_recv_unlock(ppp);
 	}
 
 	return mask;
@@ -2808,6 +2816,7 @@ static struct ppp *ppp_create_interface(struct net *net, int unit,
 
 out2:
 	mutex_unlock(&pn->all_ppp_mutex);
+	rtnl_unlock();
 	free_netdev(dev);
 out1:
 	*retp = ret;
diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
index f3c63022eb3c..4ddae8118c85 100644
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -395,6 +395,8 @@ static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb)
 
 		if (!__pppoe_xmit(sk_pppox(relay_po), skb))
 			goto abort_put;
+
+		sock_put(sk_pppox(relay_po));
 	} else {
 		if (sock_queue_rcv_skb(sk, skb))
 			goto abort_kfree;
diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c
index 90868ca5e341..ae0905ed4a32 100644
--- a/drivers/net/ppp/pptp.c
+++ b/drivers/net/ppp/pptp.c
@@ -129,24 +129,27 @@ static int lookup_chan_dst(u16 call_id, __be32 d_addr)
 	return i < MAX_CALLID;
 }
 
-static int add_chan(struct pppox_sock *sock)
+static int add_chan(struct pppox_sock *sock,
+		    struct pptp_addr *sa)
 {
 	static int call_id;
 
 	spin_lock(&chan_lock);
-	if (!sock->proto.pptp.src_addr.call_id)	{
+	if (!sa->call_id)	{
 		call_id = find_next_zero_bit(callid_bitmap, MAX_CALLID, call_id + 1);
 		if (call_id == MAX_CALLID) {
 			call_id = find_next_zero_bit(callid_bitmap, MAX_CALLID, 1);
 			if (call_id == MAX_CALLID)
 				goto out_err;
 		}
-		sock->proto.pptp.src_addr.call_id = call_id;
-	} else if (test_bit(sock->proto.pptp.src_addr.call_id, callid_bitmap))
+		sa->call_id = call_id;
+	} else if (test_bit(sa->call_id, callid_bitmap)) {
 		goto out_err;
+	}
 
-	set_bit(sock->proto.pptp.src_addr.call_id, callid_bitmap);
-	rcu_assign_pointer(callid_sock[sock->proto.pptp.src_addr.call_id], sock);
+	sock->proto.pptp.src_addr = *sa;
+	set_bit(sa->call_id, callid_bitmap);
+	rcu_assign_pointer(callid_sock[sa->call_id], sock);
 	spin_unlock(&chan_lock);
 
 	return 0;
@@ -416,7 +419,6 @@ static int pptp_bind(struct socket *sock, struct sockaddr *uservaddr,
 	struct sock *sk = sock->sk;
 	struct sockaddr_pppox *sp = (struct sockaddr_pppox *) uservaddr;
 	struct pppox_sock *po = pppox_sk(sk);
-	struct pptp_opt *opt = &po->proto.pptp;
 	int error = 0;
 
 	if (sockaddr_len < sizeof(struct sockaddr_pppox))
@@ -424,10 +426,22 @@ static int pptp_bind(struct socket *sock, struct sockaddr *uservaddr,
 
 	lock_sock(sk);
 
-	opt->src_addr = sp->sa_addr.pptp;
-	if (add_chan(po))
+	if (sk->sk_state & PPPOX_DEAD) {
+		error = -EALREADY;
+		goto out;
+	}
+
+	if (sk->sk_state & PPPOX_BOUND) {
 		error = -EBUSY;
+		goto out;
+	}
+
+	if (add_chan(po, &sp->sa_addr.pptp))
+		error = -EBUSY;
+	else
+		sk->sk_state |= PPPOX_BOUND;
 
+out:
 	release_sock(sk);
 	return error;
 }
@@ -498,7 +512,7 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr,
 	}
 
 	opt->dst_addr = sp->sa_addr.pptp;
-	sk->sk_state = PPPOX_CONNECTED;
+	sk->sk_state |= PPPOX_CONNECTED;
 
  end:
 	release_sock(sk);