Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 654594e..1eabd91 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -82,6 +82,7 @@
 		.version		= NSM_VERSION,
 		.authflavor		= RPC_AUTH_NULL,
 		.flags			= RPC_CLNT_CREATE_NOPING,
+		.cred			= current_cred(),
 	};
 
 	return rpc_create(&args);