Bluetooth: report the right security level in getsockopt

During a security level elevation we need to keep track of the current
security level of a connection until the new one is not confirmed.
Signed-off-by: NGustavo Padovan <gustavo@padovan.org>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

net/bluetooth/l2cap_sock.c

@@ -379,7 +379,10 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, ch
 		}
 
 		memset(&sec, 0, sizeof(sec));
-		sec.level = chan->sec_level;
+		if (chan->conn)
+			sec.level = chan->conn->hcon->sec_level;
+		else
+			sec.level = chan->sec_level;
 
 		if (sk->sk_state == BT_CONNECTED)
 			sec.key_size = chan->conn->hcon->enc_key_size;