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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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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.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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59
test/jdk/java/lang/Class/GetPackageBootLoaderChildLayer.java Normal file
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/*
* Copyright (c) 2018, 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
* @requires !vm.graal.enabled
* @modules jdk.attach
* @run main/othervm --limit-modules jdk.attach -Djdk.attach.allowAttachSelf
* GetPackageBootLoaderChildLayer
* @summary Exercise Class.getPackage on a class defined to the boot loader
* but in a module that is in a child layer rather than the boot layer
*/
import com.sun.tools.attach.VirtualMachine;
public class GetPackageBootLoaderChildLayer {
public static void main(String[] args) throws Exception {
// ensure that the java.management module is not in the boot layer
ModuleLayer.boot().findModule("java.management").ifPresent(m -> {
throw new RuntimeException("java.management loaded!!!");
});
// start local JMX agent via the attach mechanism
String vmid = "" + ProcessHandle.current().pid();
VirtualMachine vm = VirtualMachine.attach(vmid);
vm.startLocalManagementAgent();
// check layer, class loader, and Package object
Class<?> clazz = Class.forName("javax.management.MXBean");
if (clazz.getModule().getLayer() == ModuleLayer.boot())
throw new RuntimeException("Module is in boot layer!!!");
ClassLoader loader = clazz.getClassLoader();
if (loader != null)
throw new RuntimeException("Unexpected class loader: " + loader);
Package p = clazz.getPackage();
if (!p.getName().equals("javax.management"))
throw new RuntimeException("Unexpected package " + p);
}
}