--- a/src/share/native/sun/awt/image/jpeg/imageioJPEG.c	Wed Jan 22 10:07:01 2014 -0800
+++ b/src/share/native/sun/awt/image/jpeg/imageioJPEG.c	Fri Jan 24 10:34:31 2014 -0800
@@ -939,7 +939,9 @@
                                 JPEGImageReader_readInputDataID,
                                 sb->hstreamBuffer, 0,
                                 sb->bufferLength);
-    if (ret > sb->bufferLength) ret = sb->bufferLength;
+    if ((ret > 0) && ((unsigned int)ret > sb->bufferLength)) {
+         ret = sb->bufferLength;
+    }
     if ((*env)->ExceptionOccurred(env)
         || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
             cinfo->err->error_exit((j_common_ptr) cinfo);
@@ -1036,7 +1038,7 @@
                                 JPEGImageReader_readInputDataID,
                                 sb->hstreamBuffer,
                                 offset, buflen);
-    if (ret > buflen) ret = buflen;
+    if ((ret > 0) && ((unsigned int)ret > buflen)) ret = buflen;
     if ((*env)->ExceptionOccurred(env)
         || !GET_ARRAYS(env, data, &(src->next_input_byte))) {
         cinfo->err->error_exit((j_common_ptr) cinfo);

--- a/src/share/native/sun/awt/image/jpeg/jpegdecoder.c	Wed Jan 22 10:07:01 2014 -0800
+++ b/src/share/native/sun/awt/image/jpeg/jpegdecoder.c	Fri Jan 24 10:34:31 2014 -0800
@@ -350,7 +350,7 @@
     }
     ret = (*env)->CallIntMethod(env, src->hInputStream, InputStream_readID,
                                 src->hInputBuffer, offset, buflen);
-    if (ret > buflen) ret = buflen;
+    if ((ret > 0) && ((unsigned int)ret > buflen)) ret = buflen;
     if ((*env)->ExceptionOccurred(env) || !GET_ARRAYS(env, src)) {
         cinfo->err->error_exit((struct jpeg_common_struct *) cinfo);
     }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/javax/imageio/plugins/jpeg/TruncatedImageWarningTest.java	Fri Jan 24 10:34:31 2014 -0800
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2014, 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.File;
+import java.io.IOException;
+import javax.imageio.ImageIO;
+import javax.imageio.ImageReader;
+import javax.imageio.event.IIOReadWarningListener;
+import javax.imageio.stream.ImageInputStream;
+
+public class TruncatedImageWarningTest implements IIOReadWarningListener {
+
+    private static String fileName = "truncated.jpg";
+    boolean receivedWarning = false;
+
+    public static void main(String[] args) throws IOException {
+
+        String sep = System.getProperty("file.separator");
+        String dir = System.getProperty("test.src", ".");
+        String filePath = dir+sep+fileName;
+        System.out.println("Test file: " + filePath);
+        File f = new File(filePath);
+        ImageInputStream in = ImageIO.createImageInputStream(f);
+        ImageReader reader = ImageIO.getImageReaders(in).next();
+        TruncatedImageWarningTest twt = new TruncatedImageWarningTest();
+        reader.addIIOReadWarningListener(twt);
+        reader.setInput(in);
+        reader.read(0);
+        if (!twt.receivedWarning) {
+            throw new RuntimeException("No expected warning");
+        }
+    }
+
+    public void warningOccurred(ImageReader source, String warning) {
+        System.out.println("Expected warning: " + warning);
+        receivedWarning = true;
+    }
+}

Binary file test/javax/imageio/plugins/jpeg/truncated.jpg has changed