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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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97
test/jdk/java/util/List/NestedSubList.java Normal file
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/*
* Copyright (c) 2016, 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 8079136
* @run testng NestedSubList
* @summary Accessing a nested sublist leads to StackOverflowError
*/
import java.util.AbstractList;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Vector;
import org.testng.annotations.Test;
import org.testng.annotations.DataProvider;
import static org.testng.Assert.fail;
public class NestedSubList {
static final int NEST_LIMIT = 65536;
@Test(dataProvider="lists")
public void testAccessToSublists(List<Integer> list, boolean modifiable) {
Class<?> cls = list.getClass();
for (int i = 0; i < NEST_LIMIT; ++i) {
list = list.subList(0, 1);
}
try {
list.get(0);
if (modifiable) {
list.remove(0);
list.add(0, 42);
}
} catch (StackOverflowError e) {
fail("failed for " + cls);
}
}
@DataProvider
public static Object[][] lists() {
final boolean MODIFIABLE = true;
final boolean NON_MODIFIABLE = false;
List<Integer> c = Arrays.asList(42);
return new Object[][] {
{c, NON_MODIFIABLE},
{new ArrayList<>(c), MODIFIABLE},
{new LinkedList<>(c), MODIFIABLE},
{new MyList(), NON_MODIFIABLE},
{new Vector<>(c), MODIFIABLE},
{Collections.singletonList(42), NON_MODIFIABLE},
{Collections.checkedList(c, Integer.class), NON_MODIFIABLE},
{Collections.checkedList(new ArrayList<>(c), Integer.class), MODIFIABLE},
{Collections.checkedList(new LinkedList<>(c), Integer.class), MODIFIABLE},
{Collections.checkedList(new Vector<>(c), Integer.class), MODIFIABLE},
{Collections.synchronizedList(c), NON_MODIFIABLE},
{Collections.synchronizedList(new ArrayList<>(c)), MODIFIABLE},
{Collections.synchronizedList(new LinkedList<>(c)), MODIFIABLE},
{Collections.synchronizedList(new Vector<>(c)), MODIFIABLE},
{Collections.unmodifiableList(c), NON_MODIFIABLE},
{Collections.unmodifiableList(new ArrayList<>(c)), NON_MODIFIABLE},
{Collections.unmodifiableList(new LinkedList<>(c)), NON_MODIFIABLE},
{Collections.unmodifiableList(new Vector<>(c)), NON_MODIFIABLE},
};
}
static class MyList extends AbstractList<Integer> {
public Integer get(int index) { return 42; }
public int size() { return 1; }
}
}