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/io/LineNumberInputStream/Skip.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 1997, 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 4085939
+   @summary Check for the correct behaviour of LineNumberInputStream.skip
+   */
+
+import java.io.*;
+
+
+public class Skip{
+
+    private static void dotest(LineNumberInputStream in , int curpos ,
+                               long total , long toskip , long expected)
+        throws Exception
+    {
+
+        try {
+
+            System.err.println("\n\nCurrently at pos = " + curpos +
+                               "\nTotal bytes in the Stream = " + total +
+                               "\nNumber of bytes to skip = " + toskip +
+                               "\nNumber of bytes that should be skipped = " +
+                               expected);
+
+            long skipped = in.skip(toskip);
+
+            System.err.println("actual number skipped: "+ skipped);
+
+            if ((skipped < 0) || (skipped > expected)) {
+                throw new RuntimeException("Unexpected number of bytes skipped");
+            }
+
+        } catch (IOException e) {
+            System.err.println("IOException is thrown - possible result");
+        } catch (Throwable e) {
+            throw new RuntimeException("Unexpected "+e+" is thrown!");
+        }
+
+    }
+
+    public static void main( String argv[] ) throws Exception {
+
+        LineNumberInputStream in = new LineNumberInputStream(new MyInputStream(11));
+
+        /* test for negative skip */
+        dotest(in,  0, 11, -23,  0);
+
+        /* check for skip beyond EOF starting from before EOF */
+        dotest(in,  0, 11,  20, 11);
+
+        /* check for skip after EOF */
+        dotest(in, -1, 11,  20,  0);
+
+    }
+
+}
+
+class MyInputStream extends InputStream {
+
+    private int readctr = 0;
+    private long endoffile;
+
+    public MyInputStream(long endoffile) {
+        this.endoffile = endoffile;
+    }
+
+    public int read() {
+
+        if (readctr == endoffile) {
+            return -1;
+        }
+        else {
+            readctr++;
+            return 0;
+        }
+    }
+
+    public int available() { return 0; }
+}