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/io/File/WinSpecialFiles.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2006, 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 6192331 6348207 8202076
+   @summary Check if File.exists()/length() works correctly on Windows
+            special files hiberfil.sys and pagefile.sys
+   @requires (os.family == "windows")
+ */
+
+import java.io.File;
+public class WinSpecialFiles {
+    public static void main(String[] args) throws Exception {
+        File root = new File("C:\\");
+        File[] dir = root.listFiles();
+        for (int i = 0; i < dir.length; i++) {
+            if (!dir[i].exists()) {
+                throw new Exception("exists() returns false for <"
+                                    + dir[i].getPath() + ">");
+            }
+            String name = dir[i].getPath().toLowerCase();
+            if (name.indexOf("pagefile.sys") != -1 ||
+                name.indexOf("hiberfil.sys") != -1) {
+                if (dir[i].length() == 0) {
+                    throw new Exception("Size of existing file \""
+                                        + dir[i].getPath()
+                                        + "\" is ZERO");
+                }
+            }
+        }
+    }
+}