@@ -381,7 +381,7 @@ def _sendfile_use_sendfile(self, file, offset=0, count=None):
                     if timeout and not selector_select(timeout):
                         raise TimeoutError('timed out')
                     if count:
-                        blocksize = count - total_sent
+                        blocksize = min(count - total_sent, blocksize)
                         if blocksize <= 0:
                             break
                     try:
 
@@ -0,0 +1,2 @@
+Fix possible :exc:`OverflowError` in :meth:`socket.socket.sendfile` when pass
+*count* larger than 2 GiB on 32-bit platform.
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+Fix possible :exc:`OverflowError` in :meth:`socket.socket.sendfile` when pass
	`2`	`+count larger than 2 GiB on 32-bit platform.`