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/jdk/java/net/NetworkInterface/NullMacAddress.java
+++ b/test/jdk/java/net/NetworkInterface/NullMacAddress.java
@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2020, 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 8059309
+ * @summary Test that querrying the mac address of the loopback interface
+ *          returns null and doesn't throw a SocketException.
+ * @library /test/lib
+ * @run testng/othervm NullMacAddress
+ * @run testng/othervm -Djava.net.preferIPv6Addresses=true NullMacAddress
+ * @run testng/othervm -Djava.net.preferIPv4Stack=true NullMacAddress
+ */
+
+import org.testng.annotations.BeforeTest;
+import org.testng.annotations.Test;
+import static org.testng.Assert.*;
+
+import java.io.UncheckedIOException;
+import java.math.BigInteger;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.util.Locale;
+
+import jdk.test.lib.net.IPSupport;
+
+public class NullMacAddress {
+
+    @BeforeTest
+    void setup() {
+        IPSupport.throwSkippedExceptionIfNonOperational();
+    }
+
+    @Test
+    public void testNetworkInterfaces() throws SocketException {
+        NetworkInterface.networkInterfaces().forEach(this::testMacAddress);
+    }
+
+    private void testMacAddress(NetworkInterface ni) {
+        try {
+            var name = ni.getDisplayName();
+            System.out.println("Testing: " + name);
+            var loopback = ni.isLoopback();
+            var macAddress = ni.getHardwareAddress();
+            var hdr = macAddress == null ? "null"
+                    : "0x" + new BigInteger(1, macAddress)
+                    .toString(16).toUpperCase(Locale.ROOT);
+            System.out.println("   MAC address: " + hdr + (loopback ? " (loopback)" : ""));
+            if (loopback) {
+                assertNull(macAddress, "Loopback interface \""
+                        + name + "\" doesn't have a null MAC Address");
+            }
+        } catch (SocketException ex) {
+            throw new UncheckedIOException(ex);
+        }
+    }
+ }
+