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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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29
test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/Driver.java Normal file
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/*
* Copyright (c) 2016, 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
* @build test/* m1/* m2/* m3/* Unnamed
* @run junit/othervm test/p.PrivateLookupInTests
* @summary Unit tests for MethodHandles.privateLookupIn
*/

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/Unnamed.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.
*/
public class Unnamed { }

24
test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/m1/module-info.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.
*/
open module m1 {
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/m1/p1/Type.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.
*/
package p1;
class Type {
private static final Object obj = new Object();
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/m2/module-info.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.
*/
module m2 {
opens p2 to test;
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/m2/p2/Type.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.
*/
package p2;
class Type {
private static final Object obj = new Object();
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/m3/module-info.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.
*/
module m3 {
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/m3/p3/Type.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.
*/
package p3;
class Type {
private static final Object obj = new Object();
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/test/module-info.java Normal file
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/*
* Copyright (c) 2016, 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.
*/
module test {
requires org.junit.platform.console.standalone;
exports p to org.junit.platform.console.standalone; // JUnit invokes the public methods in PrivateLookupInTests
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/test/p/PrivateLookupInTests.java Normal file
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/*
* Copyright (c) 2016, 2026, 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.
*/
package p;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.reflect.Modifier;
import static java.lang.invoke.MethodHandles.Lookup.*;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
/**
* Unit tests for MethodHandles.privateLookupIn
*/
public class PrivateLookupInTests {
/**
* A public and non-public types in the test module but in a different
* package to the test class.
*
* package p.internal;
* public class PublicType {
* }
*
* package p.internal;
* class NonPublicType {
* private static final Object obj = ...
* }
*/
private static Class<?> publicType;
private static Class<?> nonPublicType;
// initialize and sanity check publicType/nonPublicType
@BeforeAll
public static void init() throws Exception {
publicType = Class.forName("p.internal.PublicType");
assertSame(PrivateLookupInTests.class.getModule(), publicType.getModule());
assertNotEquals(publicType.getPackageName(), PrivateLookupInTests.class.getPackageName());
assertTrue(Modifier.isPublic(publicType.getModifiers()));
nonPublicType = Class.forName("p.internal.NonPublicType");
assertSame(PrivateLookupInTests.class.getModule(), nonPublicType.getModule());
assertNotEquals(nonPublicType.getPackageName(), PrivateLookupInTests.class.getPackageName());
assertFalse(Modifier.isPublic(nonPublicType.getModifiers()));
}
// Invoke MethodHandles.privateLookupIn with a full-power caller
@Test
public void testAllAccessCallerSameModule() throws Throwable {
Lookup lookup = MethodHandles.privateLookupIn(nonPublicType, MethodHandles.lookup());
assertTrue(lookup.lookupClass() == nonPublicType);
assertTrue(lookup.hasFullPrivilegeAccess());
assertTrue((lookup.lookupModes() & ORIGINAL) == 0);
// get obj field
MethodHandle mh = lookup.findStaticGetter(nonPublicType, "obj", Object.class);
Object obj = mh.invokeExact();
}
// Invoke MethodHandles.privateLookupIn with a reduced-power caller
@Test
public void testReducedAccessCallerSameModule() throws Throwable {
Lookup caller = MethodHandles.lookup().dropLookupMode(PACKAGE);
assertEquals(0, caller.lookupModes() & PRIVATE);
assertEquals(0, caller.lookupModes() & PACKAGE);
assertNotEquals(0, caller.lookupModes() & MODULE);
assertEquals(0, caller.lookupModes() & ORIGINAL);
assertThrows(IllegalAccessException.class, () ->
MethodHandles.privateLookupIn(nonPublicType, caller));
}
// Invoke MethodHandles.privateLookupIn with the public lookup as caller
@Test
public void testPublicLookupSameModule() throws Exception {
Lookup caller = MethodHandles.publicLookup();
assertThrows(IllegalAccessException.class, () ->
MethodHandles.privateLookupIn(publicType, caller));
}
// test reads m1, open module m1 containing p1
@Test
public void testTargetClassInOpenModule() throws Throwable {
// m1/p1.Type
Class<?> clazz = Class.forName("p1.Type");
assertEquals("m1", clazz.getModule().getName());
// ensure that this module reads m1
Module thisModule = getClass().getModule();
Module m1 = clazz.getModule();
thisModule.addReads(clazz.getModule());
assertTrue(m1.isOpen("p1", thisModule));
Lookup lookup = MethodHandles.privateLookupIn(clazz, MethodHandles.lookup());
assertSame(clazz, lookup.lookupClass());
assertEquals(PRIVATE, lookup.lookupModes() & PRIVATE);
assertEquals(0, lookup.lookupModes() & MODULE);
// get obj field
MethodHandle mh = lookup.findStaticGetter(clazz, "obj", Object.class);
Object obj = mh.invokeExact();
}
// test target class in unnamed module
@Test
public void testTargetClassInUnnamedModule() throws Throwable {
Class<?> clazz = Class.forName("Unnamed");
assertFalse(clazz.getModule().isNamed());
// thisModule does not read the unnamed module
Module thisModule = getClass().getModule();
assertFalse(thisModule.canRead(clazz.getModule()));
var baseLookup = MethodHandles.lookup();
assertThrows(IllegalAccessException.class, () -> MethodHandles.privateLookupIn(clazz, baseLookup));
// thisModule reads the unnamed module
thisModule.addReads(clazz.getModule());
Lookup lookup = MethodHandles.privateLookupIn(clazz, baseLookup);
assertSame(clazz, lookup.lookupClass());
assertEquals(PRIVATE, (lookup.lookupModes() & PRIVATE));
assertEquals(0, (lookup.lookupModes() & MODULE));
}
// test does not read m2, m2 opens p2 to test
@Test
public void testCallerDoesNotRead() throws Throwable {
// m2/p2.Type
Class<?> clazz = Class.forName("p2.Type");
assertEquals("m2", clazz.getModule().getName());
Module thisModule = getClass().getModule();
Module m2 = clazz.getModule();
assertFalse(thisModule.canRead(m2));
assertTrue(m2.isOpen("p2", thisModule));
assertThrows(IllegalAccessException.class, () ->
MethodHandles.privateLookupIn(clazz, MethodHandles.lookup()));
}
// test reads m3, m3 does not open p3 to test
@Test
public void testNotOpenToCaller() throws Throwable {
// m3/p2.Type
Class<?> clazz = Class.forName("p3.Type");
assertEquals("m3", clazz.getModule().getName());
Module thisModule = getClass().getModule();
Module m3 = clazz.getModule();
thisModule.addReads(clazz.getModule());
assertFalse(m3.isOpen("p3", thisModule));
assertThrows(IllegalAccessException.class, () ->
MethodHandles.privateLookupIn(clazz, MethodHandles.lookup()));
}
// Invoke MethodHandles.privateLookupIn with a primitive class
@Test
public void testPrimitiveClassAsTargetClass() throws Exception {
assertThrows(IllegalArgumentException.class, () -> MethodHandles.privateLookupIn(int.class, MethodHandles.lookup()));
}
// Invoke MethodHandles.privateLookupIn with an array class
@Test
public void testArrayClassAsTargetClass() throws Exception {
assertThrows(IllegalArgumentException.class, () -> MethodHandles.privateLookupIn(PrivateLookupInTests[].class, MethodHandles.lookup()));
}
// Invoke MethodHandles.privateLookupIn with a primitive array class
@Test
public void testPrimitiveArrayClassAsTargetClass() throws Exception {
assertThrows(IllegalArgumentException.class, () -> MethodHandles.privateLookupIn(int[].class, MethodHandles.lookup()));
}
// Invoke MethodHandles.privateLookupIn with null
@Test
public void testNullTargetClass() throws Exception {
assertThrows(NullPointerException.class, () -> MethodHandles.privateLookupIn(null, MethodHandles.lookup()));
}
// Invoke MethodHandles.privateLookupIn with null
@Test
public void testNullCaller() throws Exception {
assertThrows(NullPointerException.class, () -> MethodHandles.privateLookupIn(getClass(), null));
}
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/test/p/internal/NonPublicType.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.
*/
package p.internal;
class NonPublicType {
private static final Object obj = new Object();
}

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test/jdk/java/lang/invoke/MethodHandles/privateLookupIn/test/p/internal/PublicType.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.
*/
package p.internal;
public class PublicType {
}