Index: Objects/stringobject.c
===================================================================
--- Objects/stringobject.c	(revision 62116)
+++ Objects/stringobject.c	(working copy)
@@ -962,7 +962,7 @@
 string_buffer_getbuffer(PyStringObject *self, Py_buffer *view, int flags)
 {
 	return PyBuffer_FillInfo(view, (void *)self->ob_sval, Py_SIZE(self),
-				 0, flags);
+				 1, flags);
 }
 
 static PySequenceMethods string_as_sequence = {
Index: Objects/memoryobject.c
===================================================================
--- Objects/memoryobject.c	(revision 62116)
+++ Objects/memoryobject.c	(working copy)
@@ -56,7 +56,7 @@
         if (mview == NULL) return NULL;
 
         mview->base = NULL;
-        if (PyObject_GetBuffer(base, &(mview->view), PyBUF_FULL) < 0) {
+        if (PyObject_GetBuffer(base, &(mview->view), PyBUF_FULL_RO) < 0) {
                 Py_DECREF(mview);
                 return NULL;
         }
Index: Objects/abstract.c
===================================================================
--- Objects/abstract.c	(revision 62116)
+++ Objects/abstract.c	(working copy)
@@ -673,7 +673,7 @@
 {
 	if (view == NULL) return 0;
 	if (((flags & PyBUF_LOCK) == PyBUF_LOCK) &&
-	    readonly != 0) {
+	    readonly == 0) {
 		PyErr_SetString(PyExc_BufferError,
 				"Cannot lock this object.");
 		return -1;
Index: Lib/test/test_socket.py
===================================================================
--- Lib/test/test_socket.py	(revision 62116)
+++ Lib/test/test_socket.py	(working copy)
@@ -1096,7 +1096,7 @@
         SocketConnectedTest.__init__(self, methodName=methodName)
 
     def testRecvInto(self):
-        buf = b" "*1024
+        buf = bytearray(b" ") * 1024
         nbytes = self.cli_conn.recv_into(buf)
         self.assertEqual(nbytes, len(MSG))
         msg = buf[:len(MSG)]
@@ -1107,7 +1107,7 @@
         self.serv_conn.send(buf)
 
     def testRecvFromInto(self):
-        buf = b" "*1024
+        buf = bytearray(b" ") * 1024
         nbytes, addr = self.cli_conn.recvfrom_into(buf)
         self.assertEqual(nbytes, len(MSG))
         msg = buf[:len(MSG)]