--- x/fs/namei.c
+++ y/fs/namei.c
@@ -5218,6 +5218,8 @@ retry_deleg:
 		error = -ENOTEMPTY;
 	if (new_dentry == trap)
 		goto exit5;
+	if (new_dentry == new_path.dentry)
+		goto exit5;
 
 	error = security_path_rename(&old_path, old_dentry,
 				     &new_path, new_dentry, flags);