Bluetooth: Fix locking issue during fast SCO reconnection.

[firefly-linux-kernel-4.4.55.git] / net / bluetooth / sco.c

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 09051e4cbade132fd6e106fd48c1e5e36f36eb1a..75f843d5423a4750f18f698a57130c6a96f71f23 100644 (file)
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -965,7 +965,9 @@ static int sco_sock_shutdown(struct socket *sock, int how)
        if (!sk)
                return 0;
 
+       sock_hold(sk);
        lock_sock(sk);
+
        if (!sk->sk_shutdown) {
                sk->sk_shutdown = SHUTDOWN_MASK;
                sco_sock_clear_timer(sk);
@@ -976,7 +978,10 @@ static int sco_sock_shutdown(struct socket *sock, int how)
                        err = bt_sock_wait_state(sk, BT_CLOSED,
                                                 sk->sk_lingertime);
        }
+
        release_sock(sk);
+       sock_put(sk);
+
        return err;
 }