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.

test/jdk/java/nio/channels/SocketChannel/Open.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2002, 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.
+ */
+
+import java.net.SocketException;
+import java.nio.channels.DatagramChannel;
+import java.nio.channels.Pipe;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+import java.nio.channels.spi.SelectorProvider;
+
+public class Open {
+
+    static void test1() {
+        for (int i=0; i<11000; i++) {
+            try {
+                SocketChannel sc = SocketChannel.open();
+            } catch (Exception e) {
+                // Presumably "Too many open files"
+            }
+        }
+    }
+    static void test2() {
+        for (int i=0; i<11000; i++) {
+            try {
+                DatagramChannel sc = DatagramChannel.open();
+            } catch (Exception e) {
+                // Presumably "Too many open files"
+            }
+        }
+    }
+    static void test3() {
+        SelectorProvider sp = SelectorProvider.provider();
+        for (int i=0; i<11000; i++) {
+            try {
+                Pipe p = sp.openPipe();
+            } catch (Exception e) {
+                // Presumably "Too many open files"
+            }
+        }
+    }
+    static void test4() {
+        for (int i=0; i<11000; i++) {
+            try {
+                ServerSocketChannel sc = ServerSocketChannel.open();
+            } catch (Exception e) {
+                // Presumably "Too many open files"
+            }
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+
+        // Load necessary classes ahead of time
+        DatagramChannel dc = DatagramChannel.open();
+        Exception se = new SocketException();
+        SelectorProvider sp = SelectorProvider.provider();
+        Pipe p = sp.openPipe();
+        ServerSocketChannel ssc = ServerSocketChannel.open();
+
+        test1();
+        test2();
+        test3();
+        test4();
+    }
+
+}