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/langtools/tools/javac/platform/VerifyCTSymClassFiles.java
+++ b/test/langtools/tools/javac/platform/VerifyCTSymClassFiles.java
@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2024, 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 8331027 8356645
+ * @summary Verify classfile inside ct.sym
+ * @library /tools/lib
+ * @modules jdk.compiler/com.sun.tools.javac.api
+ *          jdk.compiler/com.sun.tools.javac.file
+ *          jdk.compiler/com.sun.tools.javac.main
+ *          jdk.compiler/com.sun.tools.javac.platform
+ *          jdk.compiler/com.sun.tools.javac.util:+open
+ * @build toolbox.ToolBox VerifyCTSymClassFiles
+ * @run main VerifyCTSymClassFiles
+ */
+
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.attribute.ModuleMainClassAttribute;
+import java.net.URISyntaxException;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Map;
+
+public class VerifyCTSymClassFiles {
+
+    public static void main(String... args) throws IOException, URISyntaxException {
+        VerifyCTSymClassFiles t = new VerifyCTSymClassFiles();
+
+        t.checkClassFiles();
+    }
+
+    void checkClassFiles() throws IOException {
+        Path ctSym = Paths.get(System.getProperty("java.home"), "lib", "ct.sym");
+
+        if (!Files.exists(ctSym)) {
+            //no ct.sym, nothing to check:
+            return ;
+        }
+        // Expected to always be a ZIP filesystem.
+        Map<String, ?> env = Map.of("accessMode", "readOnly");
+        try (FileSystem fs = FileSystems.newFileSystem(ctSym, env)) {
+            // Check that the file system is read only (not true if not a zip file system).
+            if (!fs.isReadOnly()) {
+                throw new AssertionError("Expected read-only file system");
+            }
+            Files.walk(fs.getRootDirectories().iterator().next())
+                 .filter(p -> Files.isRegularFile(p))
+                 .forEach(p -> checkClassFile(p));
+        }
+    }
+
+    void checkClassFile(Path p) {
+        if (!"module-info.sig".equals(p.getFileName().toString())) {
+            return ;
+        }
+        try {
+            ClassFile.of().parse(p).attributes().forEach(attr -> {
+                if (attr instanceof ModuleMainClassAttribute mmca) {
+                    mmca.mainClass();
+                }
+            });
+        } catch (IOException ex) {
+            throw new UncheckedIOException(ex);
+        }
+    }
+
+}