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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.
This commit is contained in:
russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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197
test/jdk/java/lang/invoke/lambda/MetafactoryMethodNameTest.java Normal file
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/*
* Copyright (c) 2017, 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 8173587
* @summary metafactory should fail if the method name is not legal
*/
import java.lang.invoke.*;
import java.util.*;
public class MetafactoryMethodNameTest {
public static void main(String... args) {
goodName("x");
goodName("xy");
goodName("]");
goodName("x]");
goodName("]y");
goodName("x]y");
goodName("&");
goodName("x&");
goodName("&y");
goodName("x&y");
badName(".");
badName("x.");
badName(".y");
badName("x.y");
badName(";");
badName("x;");
badName(";y");
badName("x;y");
badName("[");
badName("x[");
badName("[y");
badName("x[y");
badName("/");
badName("x/");
badName("/y");
badName("x/y");
badName("<");
badName("x<");
badName("<y");
badName("x<y");
badName(">");
badName("x>");
badName(">y");
badName("x>y");
badName("");
badName("<init>");
badName("<clinit>");
}
static MethodType mt(Class<?> ret, Class<?>... params) {
return MethodType.methodType(ret, params);
}
static MethodHandle smh(Class<?> c, String name, MethodType desc) {
try {
return MethodHandles.lookup().findStatic(c, name, desc);
} catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
static Object[] arr(Object... args) {
return args;
}
public static class C {
public static void m() {}
}
public interface I {}
private static MethodHandles.Lookup lookup = MethodHandles.lookup();
private static MethodType toI = mt(I.class);
private static MethodType toVoid = mt(void.class);
private static MethodHandle mh = smh(C.class, "m", toVoid);
private static Class<?> lce = LambdaConversionException.class;
static void goodName(String name) {
succeedMFLinkage(lookup, name, toI, toVoid, mh, toVoid);
succeedAltMFLinkage(lookup, name, toI, arr(toVoid, mh, toVoid, LambdaMetafactory.FLAG_SERIALIZABLE));
}
static void badName(String name) {
failMFLinkage(lookup, name, toI, toVoid, mh, toVoid, lce);
failAltMFLinkage(lookup, name, toI, arr(toVoid, mh, toVoid, LambdaMetafactory.FLAG_SERIALIZABLE), lce);
}
static CallSite succeedMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
MethodType desc,
MethodHandle impl,
MethodType checked) {
try {
return LambdaMetafactory.metafactory(lookup, name, capType, desc, impl, checked);
} catch (Throwable t) {
String msg = String.format("Unexpected exception during linkage for metafactory(%s, %s, %s, %s, %s, %s)",
lookup, name, capType, desc, impl, checked);
throw new AssertionError(msg, t);
}
}
static void failMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
MethodType desc,
MethodHandle impl,
MethodType checked,
Class<?> expectedExceptionType) {
try {
LambdaMetafactory.metafactory(lookup, name, capType, desc, impl, checked);
} catch (Throwable t) {
if (expectedExceptionType.isInstance(t)) {
return;
} else {
String msg = String.format("Unexpected exception: expected %s during linkage for metafactory(%s, %s, %s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, desc, impl, checked);
throw new AssertionError(msg, t);
}
}
String msg = String.format("Unexpected success: expected %s during linkage for metafactory(%s, %s, %s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, desc, impl, checked);
throw new AssertionError(msg);
}
static CallSite succeedAltMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
Object[] args) {
try {
return LambdaMetafactory.altMetafactory(lookup, name, capType, args);
} catch (Throwable t) {
String msg = String.format("Unexpected exception during linkage for metafactory(%s, %s, %s, %s)",
lookup, name, capType, Arrays.asList(args));
throw new AssertionError(msg, t);
}
}
static void failAltMFLinkage(MethodHandles.Lookup lookup,
String name,
MethodType capType,
Object[] args,
Class<?> expectedExceptionType) {
try {
LambdaMetafactory.altMetafactory(lookup, name, capType, args);
} catch (Throwable t) {
if (expectedExceptionType.isInstance(t)) {
return;
} else {
String msg = String.format("Unexpected exception: expected %s during linkage for metafactory(%s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, Arrays.asList(args));
throw new AssertionError(msg, t);
}
}
String msg = String.format("Unexpected success: expected %s during linkage for metafactory(%s, %s, %s, %s)",
expectedExceptionType.getName(),
lookup, name, capType, Arrays.asList(args));
throw new AssertionError(msg);
}
}