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/javax/swing/text/AbstractDocument/StringContentPositionTest.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 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.
+ */
+
+import javax.swing.text.BadLocationException;
+import javax.swing.text.Position;
+import javax.swing.text.StringContent;
+
+/*
+ * @test
+ * @summary test that StringContent Position APIs behave as expected.
+ */
+
+public class StringContentPositionTest {
+
+    static final int SIZE = 20;
+    static final String TEXT = "hello";
+    static final int LEN = TEXT.length();
+    static final StringContent SC = new StringContent();
+
+    public static void main(String[] args) throws BadLocationException {
+
+        for (int i = 0; i < 1000; i++) {
+            test();
+            System.gc();
+        }
+    }
+
+    static void test() throws BadLocationException {
+
+        Position[] positions = new Position[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            SC.insertString(0, TEXT);
+            positions[i] = SC.createPosition(LEN);
+        }
+        for (int i = 0; i < SIZE; i++) {
+           int expected = ((SIZE - i) * LEN);
+           if (positions[i].getOffset() != expected) {
+               throw new RuntimeException("insert: Bad offset i=" + i + " off=" + positions[i].getOffset());
+           }
+        }
+        SC.remove(0, SIZE * LEN);
+        for (int i = 0; i < SIZE; i++) {
+            if (positions[i].getOffset() != 0) {
+               throw new RuntimeException("remove: Bad offset i=" + i + " off=" + positions[i].getOffset());
+            }
+        }
+     }
+}