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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/jdk/java/math/BigInteger/largeMemory/StringConstructorOverflow.java Normal file
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/*
* Copyright (c) 2013, 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 8021204
* @summary Test constructor BigInteger(String val, int radix) on very long string
* @requires (sun.arch.data.model == "64" & os.maxMemory > 8g)
* @run main/othervm -Xshare:off -Xmx8g StringConstructorOverflow
* @author Dmitry Nadezhin
*/
import java.math.BigInteger;
public class StringConstructorOverflow {
// String with hexadecimal value pow(2,pow(2,34))+1
private static String makeLongHexString() {
StringBuilder sb = new StringBuilder();
sb.append('1');
for (int i = 0; i < (1 << 30) - 1; i++) {
sb.append('0');
}
sb.append('1');
return sb.toString();
}
public static void main(String[] args) {
try {
BigInteger bi = new BigInteger(makeLongHexString(), 16);
if (bi.compareTo(BigInteger.ONE) <= 0) {
throw new RuntimeException("Incorrect result " + bi.toString());
}
} catch (ArithmeticException e) {
// expected
System.out.println("Overflow is reported by ArithmeticException, as expected");
} catch (OutOfMemoryError e) {
// possible
System.err.println("StringConstructorOverflow skipped: OutOfMemoryError");
System.err.println("Run jtreg with -javaoption:-Xmx8g");
}
}
}