undefect. CWE-407 — 63 sites patched across 27 ecosystems

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.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/langtools/tools/javac/lambda/SerializableObjectMethodReferencesOnInterfaces.java
+++ b/test/langtools/tools/javac/lambda/SerializableObjectMethodReferencesOnInterfaces.java
@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2026, Google LLC 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 8374654 8208752
+ * @summary test lambda deserialization for Object method references on interfaces
+ * @compile/ref=SerializableObjectMethodReferencesOnInterfaces.out -XDrawDiagnostics --debug=dumpLambdaDeserializationStats SerializableObjectMethodReferencesOnInterfaces.java
+ * @run main SerializableObjectMethodReferencesOnInterfaces
+ */
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+
+public class SerializableObjectMethodReferencesOnInterfaces {
+
+    public static void main(String[] args) throws Exception {
+        new Test().run();
+    }
+
+    static class Test {
+        interface I1 extends Serializable {}
+
+        interface I2 extends I1 {
+            @Override
+            public int hashCode();
+        }
+
+        interface F<T, R> extends Serializable {
+            R apply(T t);
+        }
+
+        enum E {
+            ONE
+        }
+
+        void run() throws Exception {
+            F<I1, Integer> f1 = I1::hashCode;
+            F<I2, Integer> f2 = I2::hashCode;
+            F<E, Integer> f3 = E::hashCode;
+            F<Object, Integer> f4 = Object::hashCode;
+
+            serialDeserial(f1).apply(new I1() {});
+            serialDeserial(f2).apply(new I2() {});
+            serialDeserial(f3).apply(E.ONE);
+            serialDeserial(f4).apply(new Object());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    static <T> T serialDeserial(T object) throws Exception {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (ObjectOutputStream oos = new ObjectOutputStream(baos)) {
+            oos.writeObject(object);
+        }
+        try (ObjectInputStream ois =
+                new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray()))) {
+            return (T) ois.readObject();
+        }
+    }
+}