diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 26127b6..98b47d1 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2240,6 +2240,11 @@
 	nfs_initialise_sb(sb);
 }
 
+static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
+{
+	args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3);
+}
+
 /*
  * Validate NFSv4 mount options
  */
@@ -2336,6 +2341,8 @@
 
 		nfs_validate_transport_protocol(args);
 
+		nfs4_validate_mount_flags(args);
+
 		if (args->auth_flavor_len > 1)
 			goto out_inval_auth;