undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/net/URL/HandlerLoop.java
+++ b/test/jdk/java/net/URL/HandlerLoop.java
@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 1998, 2013, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.lang.reflect.InvocationTargetException;
+import java.net.URL;
+import java.net.URLStreamHandler;
+import java.net.URLStreamHandlerFactory;
+
+/*
+ * @test
+ * @bug 4135031
+ * @summary Test bootstrap problem when a URLStreamHandlerFactory is loaded
+ *          by the application class loader.
+ * @modules java.base/sun.net.www.protocol.file
+ * @run main/othervm HandlerLoop
+ */
+public class HandlerLoop {
+
+    public static void main(String args[]) throws Exception {
+        URL.setURLStreamHandlerFactory(
+            new HandlerFactory("sun.net.www.protocol"));
+        URL url = new URL("file:///bogus/index.html");
+        System.out.println("url = " + url);
+        url.openConnection();
+    }
+
+    private static class HandlerFactory implements URLStreamHandlerFactory {
+        private String pkg;
+
+        HandlerFactory(String pkg) {
+            this.pkg = pkg;
+        }
+
+        public URLStreamHandler createURLStreamHandler(String protocol) {
+            String name = pkg + "." + protocol + ".Handler";
+            System.out.println("Loading handler class: " + name);
+            // Loading this dummy class demonstrates the bootstrap
+            // problem as the stream handler factory will be reentered
+            // over and over again if the application class loader
+            // shares the same stream handler factory.
+            new Dummy();
+            try {
+                Class<?> c = Class.forName(name);
+                return (URLStreamHandler)c.getDeclaredConstructor().newInstance();
+            } catch (ClassNotFoundException |
+                    IllegalAccessException |
+                    InstantiationException |
+                    NoSuchMethodException |
+                    InvocationTargetException e) {
+                e.printStackTrace();
+            }
+            return null;
+        }
+    }
+
+    private static class Dummy {
+    }
+}