1 files changed, 29 insertions, 6 deletions

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index a5cc8942fc3f..69d489f1f363 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -48,6 +48,8 @@ struct sco_conn {
 	spinlock_t	lock;
 	struct sock	*sk;
 
+	struct delayed_work	timeout_work;
+
 	unsigned int    mtu;
 };
 
@@ -73,9 +75,20 @@ struct sco_pinfo {
 #define SCO_CONN_TIMEOUT	(HZ * 40)
 #define SCO_DISCONN_TIMEOUT	(HZ * 2)
 
-static void sco_sock_timeout(unsigned long arg)
+static void sco_sock_timeout(struct work_struct *work)
 {
-	struct sock *sk = (struct sock *)arg;
+	struct sco_conn *conn = container_of(work, struct sco_conn,
+					     timeout_work.work);
+	struct sock *sk;
+
+	sco_conn_lock(conn);
+	sk = conn->sk;
+	if (sk)
+		sock_hold(sk);
+	sco_conn_unlock(conn);
+
+	if (!sk)
+		return;
 
 	BT_DBG("sock %p state %d", sk, sk->sk_state);
 
@@ -89,14 +102,21 @@ static void sco_sock_timeout(unsigned long arg)
 
 static void sco_sock_set_timer(struct sock *sk, long timeout)
 {
+	if (!sco_pi(sk)->conn)
+		return;
+
 	BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
-	sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
+	cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
+	schedule_delayed_work(&sco_pi(sk)->conn->timeout_work, timeout);
 }
 
 static void sco_sock_clear_timer(struct sock *sk)
 {
+	if (!sco_pi(sk)->conn)
+		return;
+
 	BT_DBG("sock %p state %d", sk, sk->sk_state);
-	sk_stop_timer(sk, &sk->sk_timer);
+	cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
 }
 
 /* ---- SCO connections ---- */
@@ -176,6 +196,9 @@ static void sco_conn_del(struct hci_conn *hcon, int err)
 		sco_chan_del(sk, err);
 		bh_unlock_sock(sk);
 		sock_put(sk);
+
+		/* Ensure no more work items will run before freeing conn. */
+		cancel_delayed_work_sync(&conn->timeout_work);
 	}
 
 	hcon->sco_data = NULL;
@@ -190,6 +213,8 @@ static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
 	sco_pi(sk)->conn = conn;
 	conn->sk = sk;
 
+	INIT_DELAYED_WORK(&conn->timeout_work, sco_sock_timeout);
+
 	if (parent)
 		bt_accept_enqueue(parent, sk, true);
 }
@@ -466,8 +491,6 @@ static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
 
 	sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
 
-	setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
-
 	bt_sock_link(&sco_sk_list, sk);
 	return sk;
 }