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
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--- a/test/jdk/java/net/ipv6tests/B6521014.java
+++ b/test/jdk/java/net/ipv6tests/B6521014.java
@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2007, 2019, 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 6521014 6543428
+ * @summary IOException thrown when Socket tries to bind to an local IPv6 address on SuSE Linux
+ * @library /test/lib
+ * @build jdk.test.lib.NetworkConfiguration
+ *        jdk.test.lib.Platform
+ * @run main B6521014
+ */
+
+import java.net.*;
+import java.io.*;
+import java.util.*;
+import jdk.test.lib.NetworkConfiguration;
+
+/*
+ *
+ * What this testcase is to test is a (weird) coupling through the
+ * cached_scope_id field of java.net.Inet6Address. Native method
+ * NET_InetAddressToSockaddr as in Linux platform will try to write
+ * and read this field, therefore Inet6Address becomes 'stateful'.
+ * So the coupling. Certain executive order, e.g. two methods use
+ * the same Inet6Address instance as illustrated in this test case,
+ * will show side effect of such coupling.
+ *
+ * And on Windows, NET_InetAddressToSockaddr() did not assign appropriate
+ * sin6_scope_id value to sockaddr_in6 structure if there's no one coming
+ * with Inet6Address instance, which caused bind exception. This test use
+ * link-local address without %scope suffix, so it is also going to test
+ * that.
+ *
+ */
+public class B6521014 {
+
+    static Inet6Address removeScope(Inet6Address addr) {
+        try {
+            return (Inet6Address)InetAddress.getByAddress(addr.getAddress());
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    static Optional<Inet6Address> getLocalAddr() throws Exception {
+        return NetworkConfiguration.probe()
+                .ip6Addresses()
+                .filter(Inet6Address::isLinkLocalAddress)
+                .findFirst();
+    }
+
+    static void test1(Inet6Address sin) throws Exception {
+        try (ServerSocket ssock = createBoundServer(sin);
+             Socket sock = new Socket()) {
+            int port = ssock.getLocalPort();
+            sock.connect(new InetSocketAddress(sin, port), 100);
+        } catch (SocketTimeoutException e) {
+            // time out exception is okay
+            System.out.println("timed out when connecting.");
+        }
+    }
+
+    static void test2(Inet6Address sin) throws Exception {
+        try (ServerSocket ssock = createBoundServer(sin);
+             Socket sock = new Socket()) {
+            int port = ssock.getLocalPort();
+            ssock.setSoTimeout(100);
+            sock.bind(new InetSocketAddress(sin, 0));
+            sock.connect(new InetSocketAddress(sin, port), 100);
+        } catch (SocketTimeoutException expected) {
+            // time out exception is okay
+            System.out.println("timed out when connecting.");
+        }
+    }
+
+    static ServerSocket createBoundServer(Inet6Address sin) throws IOException {
+        ServerSocket ss = new ServerSocket();
+        InetSocketAddress address = new InetSocketAddress(sin, 0);
+        ss.bind(address);
+        return ss;
+    }
+
+    public static void main(String[] args) throws Exception {
+        Optional<Inet6Address> oaddr = getLocalAddr();
+        if (!oaddr.isPresent()) {
+            System.out.println("Cannot find a link-local address.");
+            return;
+        }
+
+        Inet6Address addr = oaddr.get();
+        System.out.println("Using " + addr);
+        test1(addr);
+        test2(addr);
+    }
+}