8333680: com/sun/tools/attach/BasicTests.java fails with "SocketException: Permission denied: connect"

test/jdk/com/sun/tools/attach/Agent.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -28,6 +28,7 @@
  * the given port.
  */
 import java.net.Socket;
+import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.io.IOException;
 
@@ -38,7 +39,7 @@ public static void agentmain(String args) throws IOException {
         int port = Integer.parseInt(args);
         System.out.println("Agent connecting back to Tool....");
         Socket s = new Socket();
-        s.connect( new InetSocketAddress(port) );
+        s.connect(new InetSocketAddress(InetAddress.getLoopbackAddress(), port));
         System.out.println("Agent connected to Tool.");
         s.close();
     }

test/jdk/com/sun/tools/attach/BasicTests.java

@@ -23,6 +23,8 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.util.List;
@@ -213,7 +215,8 @@ public static void main(String args[]) throws Exception {
 
             System.out.println(" - Test: End-to-end connection with agent");
 
-            ServerSocket ss = new ServerSocket(0);
+            ServerSocket ss = new ServerSocket();
+            ss.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));
             int port = ss.getLocalPort();
 
             System.out.println(" - Loading Agent.jar into target VM ...");
@@ -231,7 +234,8 @@ public static void main(String args[]) throws Exception {
 
             System.out.println(" - Test: End-to-end connection with RedefineAgent");
 
-            ServerSocket ss2 = new ServerSocket(0);
+            ServerSocket ss2 = new ServerSocket();
+            ss2.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));
             int port2 = ss2.getLocalPort();
 
             System.out.println(" - Loading RedefineAgent.jar into target VM ...");

test/jdk/com/sun/tools/attach/RedefineAgent.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -32,6 +32,7 @@
  * 6446941 java.lang.instrument: multiple agent attach fails (first agent chooses capabilities)
  */
 import java.net.Socket;
+import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.io.IOException;
 import java.util.Arrays;
@@ -104,7 +105,7 @@ public static void agentmain(String args, Instrumentation inst) throws Exception
         int port = Integer.parseInt(args);
         System.out.println("RedefineAgent connecting back to Tool....");
         Socket s = new Socket();
-        s.connect( new InetSocketAddress(port) );
+        s.connect(new InetSocketAddress(InetAddress.getLoopbackAddress(), port));
         System.out.println("RedefineAgent connected to Tool.");
 
         testRedefine(inst);