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/io/Serializable/writeObjectMemory/WriteObjectMemory.java
+++ b/test/jdk/java/io/Serializable/writeObjectMemory/WriteObjectMemory.java
@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 1998, 2019, 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.
+ */
+
+/* @test
+ * @clean A WriteObjectMemory
+ * @run main WriteObjectMemory
+ * @bug 4146453 5011410
+ * @summary Test that regrow of object/handle table of ObjectOutputStream works.
+ */
+
+import java.io.*;
+import java.util.HashSet;
+import java.util.Iterator;
+
+class A implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    static HashSet<A>writeObjectExtent = new HashSet<>();
+
+    private void writeObject(ObjectOutputStream out) throws IOException {
+        if (writeObjectExtent.contains(this)) {
+            throw new InvalidObjectException("writeObject: object " +
+                                             this.toString() + " has already "
+                                             + "been serialized and should " +
+                                             "have be serialized by reference.");
+        } else {
+            writeObjectExtent.add(this);
+        }
+        out.defaultWriteObject();
+    }
+
+    A() {
+    }
+}
+
+public class WriteObjectMemory {
+    public static void main(String args[])
+        throws IOException
+    {
+        ObjectOutputStream out =
+            new ObjectOutputStream(new ByteArrayOutputStream(3000));
+        for (int i = 0; i < 1000; i++) {
+            out.writeObject(new A());
+        }
+
+        // Make sure that serialization subsystem does not
+        // allow writeObject to be called on any objects that
+        // have already been serialized. These objects should be
+        // written out by reference.
+        Iterator<A> iter = A.writeObjectExtent.iterator();
+        while (iter.hasNext()) {
+            out.writeObject(iter.next());
+        }
+
+        out.close();
+    }
+}