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/hotspot/jtreg/runtime/vthread/StackChunkClassLoaderTest.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2022, 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 StackChunkClassLoaderTest
+ * @summary Test that a different jdk.internal.vm.StackChunk can be loaded by non-null class loader
+ * @library /test/lib
+ * @compile StackChunk.java
+ * @run main/othervm StackChunkClassLoaderTest
+ */
+
+import java.lang.reflect.Method;
+import java.io.FileInputStream;
+import java.io.File;
+
+public class StackChunkClassLoaderTest extends ClassLoader {
+
+    public String loaderName;
+
+    StackChunkClassLoaderTest(String name) {
+        this.loaderName = name;
+    }
+
+    // Get data for pre-compiled class file to load.
+    public byte[] getClassData(String name) {
+        try {
+            String classDir = System.getProperty("test.classes");
+            String tempName = name.replaceAll("\\.", "/");
+            return new FileInputStream(classDir + File.separator + tempName + ".class").readAllBytes();
+        } catch (Exception e) {
+              return null;
+        }
+    }
+
+    public Class loadClass(String name) throws ClassNotFoundException {
+        if (!name.contains("StackChunk")) {
+            return super.loadClass(name);
+        }
+
+        byte[] data = getClassData(name);
+        System.out.println("name is " + name);
+        return defineClass(name, data, 0, data.length);
+    }
+
+  public static void main(java.lang.String[] unused) throws Exception {
+      ClassLoader cl = new StackChunkClassLoaderTest("StackChunkClassLoaderTest");
+      Class<?> c = Class.forName("jdk.internal.vm.StackChunk", true, cl);
+      Object obj = c.getDeclaredConstructor().newInstance();
+      System.gc();
+      java.lang.reflect.Method m = c.getMethod("print");
+      m.invoke(obj);
+      Method mi = c.getMethod("getI");
+      Object val = mi.invoke(obj);
+      if (((Integer)val).intValue() != 55) {
+          throw new RuntimeException("Test failed, StackChunk object corrupt");
+      }
+  }
+}