--- a/src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageReader.java	Tue Jan 16 10:49:49 2018 +0530
+++ b/src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageReader.java	Wed Jan 17 10:58:22 2018 +0530
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2018, 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
@@ -997,7 +997,9 @@
         }
 
         int inputBands = inputBandsForColorType[metadata.IHDR_colorType];
-        int bytesPerRow = (inputBands*passWidth*metadata.IHDR_bitDepth + 7)/8;
+        int bitsPerRow = Math.
+                multiplyExact((inputBands * metadata.IHDR_bitDepth), passWidth);
+        int bytesPerRow = (bitsPerRow + 7) / 8;
 
         // Read the image row-by-row
         for (int srcY = 0; srcY < passHeight; srcY++) {
@@ -1048,7 +1050,8 @@
         int bytesPerPixel = (bitDepth == 16) ? 2 : 1;
         bytesPerPixel *= inputBands;
 
-        int bytesPerRow = (inputBands*passWidth*bitDepth + 7)/8;
+        int bitsPerRow = Math.multiplyExact((inputBands * bitDepth), passWidth);
+        int bytesPerRow = (bitsPerRow + 7) / 8;
         int eltsPerRow = (bitDepth == 16) ? bytesPerRow/2 : bytesPerRow;
 
         // If no pixels need updating, just skip the input data

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/javax/imageio/plugins/png/PngReaderLargeWidthStrideTest.java	Wed Jan 17 10:58:22 2018 +0530
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2018, 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     8191174
+ * @summary Test verifies that PNGImageReader doesn't throw any undocumented
+ *          Exception because of faulty calculation of scanline stride in
+ *          PNGImageReader.
+ * @run     main PngReaderLargeWidthStrideTest
+ */
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.util.Base64;
+import javax.imageio.IIOException;
+import javax.imageio.ImageIO;
+
+public class PngReaderLargeWidthStrideTest {
+
+    private static String inputImageBase64 = "iVBORw0KGgoAAAANSUhEUk////8AAAA"
+            + "BCAAAAAA6fptVAAAACklEQVQYV2P4DwABAQEAWk1v8QAAAABJRU5ErkJgggo=";
+
+    public static void main(String[] args) throws Exception {
+
+        byte[] inputBytes = Base64.getDecoder().decode(inputImageBase64);
+        InputStream in = new ByteArrayInputStream(inputBytes);
+
+        try {
+            ImageIO.read(in);
+        } catch (IIOException e) {
+            // Do nothing we expect it to throw IIOException, but if it throws
+            // any other exception test will fail.
+        }
+    }
+}
+