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.

test/jdk/java/awt/Clipboard/NoOwnerNoTargetsTest.java

@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2002, 2025, 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
+ * @bug 4655996
+ * @summary tests that getting the system clipboard contents doesn't cause
+ *          IOException if there is no clipboard owner or the owner doesn't
+ *          export any target types
+ * @key headful
+ * @library /test/lib
+ * @run main NoOwnerNoTargetsTest
+ */
+
+import java.awt.Toolkit;
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.ClipboardOwner;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.StringSelection;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+public class NoOwnerNoTargetsTest implements ClipboardOwner {
+
+    final Clipboard clipboard =
+        Toolkit.getDefaultToolkit().getSystemClipboard();
+    public static final int CLIPBOARD_DELAY = 1000;
+
+    public static void main(String[] args) throws Exception {
+        if (args.length > 0) {
+            NoOwnerNoTargetsTest test = new NoOwnerNoTargetsTest();
+            test.execute();
+            return;
+        }
+
+        new NoOwnerNoTargetsTest().start();
+    }
+
+    public void execute() {
+        final ClipboardOwner clipboardOwner = new ClipboardOwner() {
+                public void lostOwnership(Clipboard clip,
+                                          Transferable contents) {
+                    System.exit(0);
+                }
+            };
+        final Transferable emptyTransferable = new Transferable() {
+                public DataFlavor[] getTransferDataFlavors() {
+                    return new DataFlavor[0];
+                }
+                public boolean isDataFlavorSupported(DataFlavor df) {
+                    return false;
+                }
+                public Object getTransferData(DataFlavor df)
+                  throws UnsupportedFlavorException {
+                    throw new UnsupportedFlavorException(df);
+                }
+            };
+
+        clipboard.setContents(emptyTransferable, clipboardOwner);
+        final Object o = new Object();
+        synchronized (o) {
+            try {
+                o.wait();
+            } catch (InterruptedException ie) {
+                ie.printStackTrace();
+            }
+        }
+    }
+
+    public void start() throws Exception {
+        clipboard.getContents(null);
+
+        Transferable transferable = new StringSelection("TEXT");
+        clipboard.setContents(transferable, this);
+
+        ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder(
+                NoOwnerNoTargetsTest.class.getName(),
+                "child"
+        );
+
+        Process process = ProcessTools.startProcess("Child", pb);
+        OutputAnalyzer outputAnalyzer = new OutputAnalyzer(process);
+
+        if (!process.waitFor(15, TimeUnit.SECONDS)) {
+            process.destroyForcibly();
+            throw new TimeoutException("Timed out waiting for Child");
+        }
+
+        outputAnalyzer.shouldHaveExitValue(0);
+    }
+
+    public void lostOwnership(Clipboard clip, Transferable contents) {
+        final Transferable transferable = new StringSelection("TEXT");
+        final Runnable r = () -> {
+            try {
+                Thread.sleep(CLIPBOARD_DELAY);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            clipboard.getContents(null);
+            clipboard.setContents(transferable, null);
+        };
+        final Thread t = new Thread(r);
+        t.start();
+    }
+}