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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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test/langtools/tools/javac/patterns/SOEDeeplyNestedBlocksTest.java Normal file
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/*
* 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 8322992 8331030
* @summary Javac fails with StackOverflowError when compiling deeply nested synchronized blocks
* @run main SOEDeeplyNestedBlocksTest
*/
import java.net.*;
import java.util.*;
import javax.tools.*;
public class SOEDeeplyNestedBlocksTest {
static final int NESTING_DEPTH = 500;
public static void main(String... args) {
var lines = new ArrayList<String>();
lines.add("class Test {");
lines.add(" static { ");
for (int i = 0; i < NESTING_DEPTH; i++) lines.add(" synchronized (Test.class) {");
for (int i = 0; i < NESTING_DEPTH; i++) lines.add(" }");
lines.add(" }");
lines.add("}");
var source = SimpleJavaFileObject.forSource(URI.create("mem://Test.java"), String.join("\n", lines));
var compiler = ToolProvider.getSystemJavaCompiler();
var task = compiler.getTask(null, null, noErrors, null, null, List.of(source));
if (!task.call()) {
throw new AssertionError("test failed due to a compilation error");
}
}
static DiagnosticListener<? super JavaFileObject> noErrors = d -> {
System.out.println(d);
if (d.getKind() == Diagnostic.Kind.ERROR) {
throw new AssertionError(d.getMessage(null));
}
};
}