shell-init: error retrieving current directory: getcwd: cannot access parent directories: Permission denied

[LynnOS]

root@Avct Linux-vserver:~# pwd
/root
root@Avct Linux-vserver:~# ls -ld /root
drwx------    3 root     root         4096 Jul  3 14:52 /root
root@Avct Linux-vserver:~# su lynn
*shell-init: error retrieving current directory: getcwd: cannot access
parent directories: Permission denied*
lynn@Avct Linux-vserver:/root$

lynn@Avct Linux-vserver:/root$ bash --version
GNU bash, version 3.2.39(1)-release (i686-pc-linux-gnu)
Copyright (C) 2007 Free Software Foundation, Inc.

===============================================================================

I appay 39 patches from  http://ftp.gnu.org/gnu/bash/bash-3.2-patches
but the error message doesn't go
in many popular linux distributions,the problem disappear

thanks

-- 
OpenEmbedded,Linux vserver,Python