--- a/jdk/src/java.logging/share/classes/java/util/logging/LogManager.java	Wed Apr 01 16:01:41 2015 +0300
+++ b/jdk/src/java.logging/share/classes/java/util/logging/LogManager.java	Thu Apr 02 11:42:07 2015 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2015, 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
@@ -1379,7 +1379,19 @@
         reset();
 
         // Load the properties
-        props.load(ins);
+        try {
+            props.load(ins);
+        } catch (IllegalArgumentException x) {
+            // props.load may throw an IllegalArgumentException if the stream
+            // contains malformed Unicode escape sequences.
+            // We wrap that in an IOException as readConfiguration is
+            // specified to throw IOException if there are problems reading
+            // from the stream.
+            // Note: new IOException(x.getMessage(), x) allow us to get a more
+            // concise error message than new IOException(x);
+            throw new IOException(x.getMessage(), x);
+        }
+
         // Instantiate new configuration objects.
         String names[] = parseClassNames("config");
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/logging/LogManager/Configuration/InvalidEscapeConfigurationTest.java	Thu Apr 02 11:42:07 2015 +0200
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2015, 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.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.io.UnsupportedEncodingException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Properties;
+import java.util.logging.LogManager;
+
+
+/**
+ * @test
+ * @bug 8075810
+ * @run main/othervm InvalidEscapeConfigurationTest
+ * @author danielfuchs
+ */
+public class InvalidEscapeConfigurationTest {
+
+    public static void main(String[] args)
+            throws UnsupportedEncodingException, IOException {
+        String[] validEscapes = {
+            "com.f\\u006fo.level = INF\\u004f",
+            "com.f\\u006fo.level = INFO",
+            "com.foo.level = INF\\u004f"
+        };
+        String[] invalidEscapes = {
+            "com.fo\\u0O6f.level = INF\\u0O4f",
+            "com.fo\\u0O6f.level = INFO",
+            "com.foo.level = INF\\u0O4f"
+        };
+        for (String line : validEscapes) {
+            test(line, true);
+        }
+        for (String line : invalidEscapes) {
+            test(line, false);
+        }
+        try {
+            Properties props = new Properties();
+            props.load((InputStream)null);
+            throw new RuntimeException("Properties.load(null): "
+                    + "NullPointerException exception not raised");
+        } catch (NullPointerException x) {
+            System.out.println("Properties.load(null): "
+                    + "got expected exception: " + x);
+        }
+        try {
+            LogManager.getLogManager().readConfiguration(null);
+            throw new RuntimeException("LogManager.readConfiguration(null): "
+                    + "NullPointerException exception not raised");
+        } catch (NullPointerException x) {
+            System.out.println("LogManager.readConfiguration(null): "
+                    + "got expected exception: " + x);
+        }
+
+
+    }
+
+    public static void test(String line, boolean valid) throws IOException {
+        String test = (valid ? "valid" : "invalid")
+                + " line \"" +line + "\"";
+        System.out.println("Testing " + test);
+
+        // First verify that we get the expected result from Properties.load()
+        try {
+            ByteArrayInputStream bais =
+                    new ByteArrayInputStream(line.getBytes("UTF-8"));
+            Properties props = new Properties();
+            props.load(bais);
+            if (!valid) {
+                throw new RuntimeException(test
+                        + "\n\tProperties.load: expected exception not raised");
+            } else {
+                System.out.println("Properties.load passed for " + test);
+            }
+        } catch(IllegalArgumentException x) {
+            if (!valid) {
+                System.out.println(
+                        "Properties.load: Got expected exception: "
+                        + x + "\n\tfor " + test);
+            } else {
+                throw x;
+            }
+        }
+
+        // Then verify that we get the expected result from
+        // LogManager.readConfiguration
+        try {
+            String content = defaultConfiguration() + '\n' + line + '\n';
+            ByteArrayInputStream bais =
+                    new ByteArrayInputStream(content.getBytes("UTF-8"));
+            LogManager.getLogManager().readConfiguration(bais);
+            if (!valid) {
+                throw new RuntimeException(test
+                        + "\n\tLogManager.readConfiguration: "
+                        + "expected exception not raised");
+            } else {
+                System.out.println("LogManager.readConfiguration passed for "
+                        + test);
+            }
+        } catch(IOException x) {
+            if (!valid) {
+                System.out.println(
+                        "LogManager.readConfiguration: Got expected exception: "
+                        + x + "\n\tfor " + test);
+            } else {
+                throw x;
+            }
+        }
+    }
+
+    static String getConfigurationFileName() {
+        String fname = System.getProperty("java.util.logging.config.file");
+        if (fname == null) {
+            fname = System.getProperty("java.home");
+            if (fname == null) {
+                throw new Error("Can't find java.home ??");
+            }
+            fname = Paths.get(fname, "conf", "logging.properties")
+                    .toAbsolutePath().normalize().toString();
+        }
+        return fname;
+    }
+
+    static String defaultConfiguration() throws IOException {
+        Properties props = new Properties();
+        String fileName = getConfigurationFileName();
+        if (Files.exists(Paths.get(fileName))) {
+            try (InputStream is = new FileInputStream(fileName);) {
+                props.load(is);
+            } catch(IOException x) {
+                throw new UncheckedIOException(x);
+            }
+        }
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        props.store(bos, null);
+        return bos.toString();
+    }
+
+}