1 files changed, 14 insertions, 13 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 5b41e2321209..27ca50ab1cd1 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -979,11 +979,11 @@ static struct sock *unix_create1(struct net *net, struct socket *sock, int kern,
 	sk->sk_max_ack_backlog	= net->unx.sysctl_max_dgram_qlen;
 	sk->sk_destruct		= unix_sock_destructor;
 	u = unix_sk(sk);
-	u->inflight = 0;
+	u->listener = NULL;
+	u->vertex = NULL;
 	u->path.dentry = NULL;
 	u->path.mnt = NULL;
 	spin_lock_init(&u->lock);
-	INIT_LIST_HEAD(&u->link);
 	mutex_init(&u->iolock); /* single task reading lock */
 	mutex_init(&u->bindlock); /* single task binding lock */
 	init_waitqueue_head(&u->peer_wait);
@@ -1597,6 +1597,7 @@ restart:
 	newsk->sk_type		= sk->sk_type;
 	init_peercred(newsk);
 	newu = unix_sk(newsk);
+	newu->listener = other;
 	RCU_INIT_POINTER(newsk->sk_wq, &newu->peer_wq);
 	otheru = unix_sk(other);
 
@@ -1692,8 +1693,8 @@ static int unix_accept(struct socket *sock, struct socket *newsock, int flags,
 		       bool kern)
 {
 	struct sock *sk = sock->sk;
-	struct sock *tsk;
 	struct sk_buff *skb;
+	struct sock *tsk;
 	int err;
 
 	err = -EOPNOTSUPP;
@@ -1718,6 +1719,7 @@ static int unix_accept(struct socket *sock, struct socket *newsock, int flags,
 	}
 
 	tsk = skb->sk;
+	unix_update_edges(unix_sk(tsk));
 	skb_free_datagram(sk, skb);
 	wake_up_interruptible(&unix_sk(sk)->peer_wait);
 
@@ -1789,8 +1791,6 @@ static inline bool too_many_unix_fds(struct task_struct *p)
 
 static int unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb)
 {
-	int i;
-
 	if (too_many_unix_fds(current))
 		return -ETOOMANYREFS;
 
@@ -1802,21 +1802,18 @@ static int unix_attach_fds(struct scm_cookie *scm, struct sk_buff *skb)
 	if (!UNIXCB(skb).fp)
 		return -ENOMEM;
 
-	for (i = scm->fp->count - 1; i >= 0; i--)
-		unix_inflight(scm->fp->user, scm->fp->fp[i]);
+	if (unix_prepare_fpl(UNIXCB(skb).fp))
+		return -ENOMEM;
 
 	return 0;
 }
 
 static void unix_detach_fds(struct scm_cookie *scm, struct sk_buff *skb)
 {
-	int i;
-
 	scm->fp = UNIXCB(skb).fp;
 	UNIXCB(skb).fp = NULL;
 
-	for (i = scm->fp->count - 1; i >= 0; i--)
-		unix_notinflight(scm->fp->user, scm->fp->fp[i]);
+	unix_destroy_fpl(scm->fp);
 }
 
 static void unix_peek_fds(struct scm_cookie *scm, struct sk_buff *skb)
@@ -1937,8 +1934,10 @@ static void scm_stat_add(struct sock *sk, struct sk_buff *skb)
 	struct scm_fp_list *fp = UNIXCB(skb).fp;
 	struct unix_sock *u = unix_sk(sk);
 
-	if (unlikely(fp && fp->count))
+	if (unlikely(fp && fp->count)) {
 		atomic_add(fp->count, &u->scm_stat.nr_fds);
+		unix_add_edges(fp, u);
+	}
 }
 
 static void scm_stat_del(struct sock *sk, struct sk_buff *skb)
@@ -1946,8 +1945,10 @@ static void scm_stat_del(struct sock *sk, struct sk_buff *skb)
 	struct scm_fp_list *fp = UNIXCB(skb).fp;
 	struct unix_sock *u = unix_sk(sk);
 
-	if (unlikely(fp && fp->count))
+	if (unlikely(fp && fp->count)) {
 		atomic_sub(fp->count, &u->scm_stat.nr_fds);
+		unix_del_edges(fp);
+	}
 }
 
 /*