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/lang/StringBuffer/HugeCapacity.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2019, 2024, 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 jdk.internal.util.ArraysSupport;
+
+/**
+ * @test
+ * @bug 8218227
+ * @summary StringBuilder/StringBuffer constructor throws confusing
+ *          NegativeArraySizeException
+ * @modules java.base/jdk.internal.util
+ * @requires (sun.arch.data.model == "64" & os.maxMemory >= 8G)
+ * @run main/othervm -Xms6G -Xmx6G HugeCapacity
+ */
+
+public class HugeCapacity {
+    private static int failures = 0;
+
+    public static void main(String[] args) {
+        testHugeInitialString();
+        testHugeInitialCharSequence();
+        if (failures > 0) {
+            throw new RuntimeException(failures + " tests failed");
+        }
+    }
+
+    private static void testHugeInitialString() {
+        try {
+            String str = "Z".repeat(ArraysSupport.SOFT_MAX_ARRAY_LENGTH);
+            StringBuffer sb = new StringBuffer(str);
+        } catch (OutOfMemoryError ignore) {
+        } catch (Throwable unexpected) {
+            unexpected.printStackTrace();
+            failures++;
+        }
+    }
+
+    private static void testHugeInitialCharSequence() {
+        try {
+            CharSequence seq = new MyHugeCharSeq();
+            StringBuffer sb = new StringBuffer(seq);
+        } catch (OutOfMemoryError ignore) {
+        } catch (Throwable unexpected) {
+            unexpected.printStackTrace();
+            failures++;
+        }
+    }
+
+    private static class MyHugeCharSeq implements CharSequence {
+        public char charAt(int i) {
+            throw new UnsupportedOperationException();
+        }
+        public int length() { return Integer.MAX_VALUE; }
+        public CharSequence subSequence(int st, int e) {
+            throw new UnsupportedOperationException();
+        }
+        public String toString() { return ""; }
+    }
+}