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/langtools/jdk/jshell/UserInputTest.java

@@ -0,0 +1,109 @@
+/*
+ * 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
+ * @bug 8131023 8167461
+ * @summary Verify that the user's code can read System.in
+ * @build KullaTesting TestingInputStream
+ * @run junit UserInputTest
+ * @key intermittent
+ */
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.junit.jupiter.api.Test;
+
+public class UserInputTest extends KullaTesting {
+
+    @Test
+    public void testReadInput() {
+        setInput("AB\n");
+        assertEval("System.in.read()", "65");
+        setInput("CD\n");
+        assertEval("System.in.read()", "67");
+    }
+
+    @Test
+    public void testScanner() {
+        assertEval("import java.util.Scanner;");
+        assertEval("Scanner s = new Scanner(System.in);");
+        setInput("12\n");
+        assertEval("s.nextInt();", "12");
+    }
+
+    @Test
+    public void testClose() {
+        setInput(new InputStream() {
+            private final byte[] data = new byte[] {0, 1, 2};
+            private int cursor;
+            @Override public int read() throws IOException {
+                if (cursor < data.length) {
+                    return data[cursor++];
+                } else {
+                    return -1;
+                }
+            }
+        });
+        assertEval("int read;", "0");
+        assertEval("System.in.read();", "0");
+        assertEval("System.in.read();", "1");
+        assertEval("System.in.read();", "2");
+        assertEval("System.in.read();", "-1");
+        assertEval("System.in.read();", "-1");
+        assertEval("System.in.read();", "-1");
+    }
+
+    @Test
+    public void testException() {
+        setInput(new InputStream() {
+            private final int[] data = new int[] {0, 1, -2, 2};
+            private int cursor;
+            @Override public int read() throws IOException {
+                if (cursor < data.length) {
+                    int d = data[cursor++];
+                    if (d == (-2)) {
+                        throw new IOException("Crashed");
+                    }
+                    return d;
+                } else {
+                    return -1;
+                }
+            }
+        });
+        assertEval("int read;", "0");
+        assertEval("System.in.read();", "0");
+        assertEval("System.in.read();", "1");
+        assertEval("java.io.IOException e;");
+        assertEval("try { System.in.read(); } catch (java.io.IOException exc) { e = exc; }");
+        assertEval("e", "java.io.IOException: Crashed");
+        assertEval("System.in.read();", "2");
+        assertEval("System.in.read();", "-1");
+    }
+
+    @Test
+    public void testNoConsole() {
+        assertEval("System.console()", "null");
+    }
+}