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/reflect/ReflectStackOverflow.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2018, 2019, 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 4185411
+ * @summary This program crashes in 1.1, but runs okay in 1.2.
+ * @run main/othervm -Xss512k ReflectStackOverflow
+ */
+import java.lang.reflect.*;
+
+public class ReflectStackOverflow {
+    private static final int COUNT = 11000;
+
+    public static void main(String[] cmdline) throws Throwable {
+        for (int i = 0; i < COUNT+1; i++) {
+            stuff(i);
+        }
+    }
+
+    private static void stuff(int count) throws Throwable {
+        if (count < COUNT)
+            return;  // don't do anything the first COUNT times.
+
+        try {
+            final Method method =
+                Method.class.getMethod
+                ("invoke", new Class[] { Object.class, Object[].class });
+
+            final Object[] args = new Object[] { method, null };
+            args[1] = args;
+
+            method.invoke(method, args); // "recursive reflection"
+            // exception should have been thrown by now...
+            System.out.println("how did I get here?");
+        } catch(Throwable t) {
+            int layers;
+            for(layers = 0; t instanceof InvocationTargetException; layers++)
+                t = ((InvocationTargetException)t).getTargetException();
+
+            System.err.println("Found " + layers + " layers of wrappers.");
+            if (!(t instanceof StackOverflowError)) {
+                throw t;
+            }
+        }
+    }
+}