8237495: Java MIDI fails with a dereferenced memory error when asked to send a raw 0xF7

src/java.desktop/share/native/libjsound/MidiOutDevice.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2020, 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
@@ -133,7 +133,7 @@ Java_com_sun_media_sound_MidiOutDevice_nSendLongMessage(JNIEnv* e, jobject thisO
     }
     /* "continuation" sysex messages start with F7 (instead of F0), but
        are sent without the F7. */
-    if (data[0] == 0xF7) {
+    if (data[0] == 0xF7 && size > 1) {
         data++;
         size--;
     }

test/jdk/javax/sound/midi/SysexMessage/SendRawSysexMessage.java

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2020, 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 javax.sound.midi.MidiDevice;
+import javax.sound.midi.MidiMessage;
+import javax.sound.midi.MidiSystem;
+import javax.sound.midi.MidiUnavailableException;
+import javax.sound.midi.Receiver;
+import javax.sound.midi.ShortMessage;
+import javax.sound.midi.SysexMessage;
+
+import static javax.sound.midi.SysexMessage.SPECIAL_SYSTEM_EXCLUSIVE;
+import static javax.sound.midi.SysexMessage.SYSTEM_EXCLUSIVE;
+
+/**
+ * @test
+ * @bug 8237495
+ * @summary fail with a dereferenced memory error when asked to send a raw 0xF7
+ */
+public final class SendRawSysexMessage {
+
+    private static final class RawMidiMessage extends MidiMessage {
+        @Override
+        public RawMidiMessage clone() {
+            return new RawMidiMessage(getMessage());
+        }
+        @Override
+        public int getStatus() {
+            return SYSTEM_EXCLUSIVE; // not that this really matters
+        }
+
+        RawMidiMessage(byte[] data) {
+            super(data.clone());
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();
+        System.err.println("List of devices to test:");
+        for (int i = 0; i < infos.length; i++) {
+            System.err.printf("\t%d.\t%s%n", i, infos[i]);
+        }
+        for (int i = 0; i < infos.length; i++) {
+            System.err.printf("%d.\t%s%n", i, infos[i]);
+            try {
+                test(infos[i]);
+            } catch (MidiUnavailableException ignored){
+                // try next
+            }
+        }
+    }
+
+    private static void test(MidiDevice.Info info) throws Exception {
+        try (MidiDevice device = MidiSystem.getMidiDevice(info)) {
+            System.err.println("Sending to " + device + " (" + info + ")");
+            if (!device.isOpen())
+                device.open();
+            try (Receiver r = device.getReceiver()) {
+                System.err.println("note on");
+                r.send(new ShortMessage(ShortMessage.NOTE_ON, 5, 5), -1);
+                System.err.println("sysex");
+                r.send(new SysexMessage(new byte[]{
+                        (byte) SYSTEM_EXCLUSIVE, 0x0, 0x03, 0x04,
+                        (byte) SPECIAL_SYSTEM_EXCLUSIVE}, 5), -1);
+                System.err.println("raw 1");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) 0x02, 0x02, 0x03, 0x04}), -1);
+                System.err.println("raw 2");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) 0x09, 0x02, 0x03, 0x04}), -1);
+                System.err.println("raw 3");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) SYSTEM_EXCLUSIVE, 0x02, 0x03, 0x04}), -1);
+                System.err.println("raw 4");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) 0x02, 0x02, 0x03, 0x04}), -1);
+                System.err.println("raw 5");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) 0x02, 0x02, 0x03,
+                        (byte) SPECIAL_SYSTEM_EXCLUSIVE}), -1);
+                System.err.println("raw 6");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) SYSTEM_EXCLUSIVE, 0x02, 0x03, 0x04}), -1);
+                System.err.println("sleep");
+                Thread.sleep(1000);
+                System.err.println("raw 7");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) 0x02, 0x02, 0x03, 0x04}), -1);
+                System.err.println("sleep");
+                Thread.sleep(1000);
+                System.err.println("raw 8");
+                r.send(new RawMidiMessage(new byte[]{
+                        (byte) SPECIAL_SYSTEM_EXCLUSIVE}), -1);
+                System.err.println("note off");
+                r.send(new ShortMessage(ShortMessage.NOTE_OFF, 5, 5), -1);
+                System.err.println("done, should quit");
+                System.err.println();
+            }
+        }
+    }
+}