--- a/src/share/classes/sun/nio/ch/SocketAdaptor.java	Fri Jun 06 14:58:41 2014 +0400
+++ b/src/share/classes/sun/nio/ch/SocketAdaptor.java	Tue Feb 02 09:45:39 2021 +0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2021, 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
@@ -198,6 +198,9 @@
             throws IOException
         {
             synchronized (sc.blockingLock()) {
+                if (!sc.isOpen()) {
+                    throw new ClosedChannelException();
+                }
                 if (!sc.isBlocking())
                     throw new IllegalBlockingModeException();
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/java/nio/channels/SocketChannel/AdaptSocketReadAfterClose.java	Tue Feb 02 09:45:39 2021 +0800
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2021, Huawei Technologies Co., Ltd. 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.IOException;
+import java.io.InputStream;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.net.SocketAddress;
+import java.nio.channels.ClosedChannelException;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+
+import org.testng.annotations.Test;
+import org.testng.Assert;
+
+/*
+ * @test
+ * @bug 8260875
+ * @summary Reading a closed SocketChannel should throw a ClosedChannelException
+ * @run testng AdaptSocketReadAfterClose
+ */
+
+public class AdaptSocketReadAfterClose {
+
+    @Test
+    public void testReadAfterClose() throws InterruptedException, IOException {
+        ServerSocketChannel ssc = ServerSocketChannel.open();
+        ssc.bind(new InetSocketAddress(InetAddress.getLocalHost(), 0));
+        SocketAddress saddr = ssc.getLocalAddress();
+
+        SocketChannel channel = SocketChannel.open(saddr);
+        channel.configureBlocking(false);
+        Socket s = channel.socket();
+        InputStream is = s.getInputStream();
+        channel.close();
+
+        byte[] buf = new byte[10];
+        Throwable ex = Assert.expectThrows(ClosedChannelException.class, () -> is.read(buf));
+        Assert.assertEquals(ex.getClass(), ClosedChannelException.class);
+        ssc.close();
+    }
+}