[PATCH] Fix rpc_setbufsize() usage

 - fix null dereference on xprt->inet if (!connected), which happens if
   a rpc cred wasn't available (root+auth_gss case)
 - set bufsize on reconnect

net/sunrpc/clnt.c

@@ -385,7 +385,8 @@ rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize
 	xprt->rcvsize = 0;
 	if (rcvsize)
 		xprt->rcvsize = rcvsize + RPC_SLACK_SPACE;
-	xprt_sock_setbufsize(xprt);
+	if (xprt_connected(xprt))
+		xprt_sock_setbufsize(xprt);
 }
 
 /*

net/sunrpc/xprt.c

@@ -436,6 +436,7 @@ xprt_connect(struct rpc_task *task)
 		goto out_write;
 	}
 	xprt_bind_socket(xprt, sock);
+	xprt_sock_setbufsize(xprt);
 
 	if (!xprt->stream)
 		goto out_write;