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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
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test/jdk/java/lang/StringBuffer/SetLength.java Normal file
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/*
* Copyright (c) 1997, 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 4089062
@summary A String created from a StringBuffer can be overwritten
if setLength() to a value less than the buffer length is called
on the StringBuffer and then the StringBuffer is appended to.
@author Robert Field
*/
public class SetLength {
public static void main(String[] argv) throws Exception {
StringBuffer active = new StringBuffer();
active.append("first one");
String a = active.toString();
active.setLength(0);
active.append("second");
String b = active.toString();
active.setLength(0);
System.out.println("first: " + a);
System.out.println("second: " + b);
if (!a.equals("first one")) {
throw new Exception("StringBuffer.setLength() overwrote string");
}
}
}