Re: [Vserver] openpty(): No such file

From: Oliver Heinz <oliver.heinz_at_schunk.net>
Date: Sun 19 Nov 2006 - 14:21:09 GMT
Message-Id: <200611191521.09853.oliver.heinz@schunk.net>

Am Samstag, 18. November 2006 21:46 schrieb Herbert Poetzl:
> On Sat, Nov 18, 2006 at 01:05:48PM +0100, Oliver Heinz wrote:
> > Am Freitag, 17. November 2006 18:48 schrieb Oliver Heinz:
> > > Am Freitag, 17. November 2006 17:49 schrieb Herbert Poetzl:
> > > > On Fri, Nov 17, 2006 at 11:05:52AM +0100, Oliver Heinz wrote:
> > > > > Am Donnerstag, 16. November 2006 13:11 schrieb Daniel Hokka
Zakrisson:
> > > > > > Oliver Heinz wrote:
> > > > > > > Hello,
> > > > > > >
> > > > > > > yesterday I upgraded my development server from
> > > > > > > vmlinuz-2.6.12.5-vs2.0 to 2.6.17.14-grsec2.1.9-vs2.0.2.1 and
> > > > > > > util-vserver from util-vserver-0.30.210 to
> > > > > > > util-vserver-0.30.211.
> > > > > > >
> > > > > > > All Debian/Ubuntu guests are running fine, but for the old
> > > > > > > Suse9.0 guest when entering via vserver servername enter i get
> > > > > > > an error:
> > > > > > >
> > > > > > > root@gobi:/usr/src/packages# vserver dakar enter vlogin:
> > > > > > > openpty(): No such file or directory
> > > > > > > root@gobi:/usr/src/packages#
> > > > > > >
> > > > > > > Any Idea what's wrong? Entering via ssh works fine, all
> > > > > > > services are running, so it's not a major issue, just annoing.
> > > > > >
> > > > > > Does it have /dev/ptmx and a mounted /dev/pts? When you log in
> > > > > > through ssh, what tty are you on?
> > > > >
> > > > > dakar:~ # w
> > > > > 10:56:59 up 1 day, 1:03, 2 users, load average: 0.16, 0.16,
> > > > > 0.29 USER TTY LOGIN@ IDLE JCPU PCPU WHAT
> > > > > oheinz ttyp1 10:28 11:22 0.10s 0.10s -bash
> > > > > root ttyp2 10:56 0.00s 0.04s 0.00s w
> > > >
> > > > ~~~~~~~~~
> > > > looks like legacy ptys .. haven't seen them
> > > > for some time now, not sure that is related though ..
> > >
> > > I was wondering too, when I ssh to a real physical host with suse 9.0
> > > and kernel 2.4 I get ptys
> > >
> > > > what does /dev contain in your guest?
> >
> > Just those few devices that are SuSE default ;-)
> >
> > - I tried to attach the List but: Message body is too big and nobody
> > approved it yet. Is there someting special you are interessted?
> > ttys?pts?
>
> ahem, this is what your guest should actually have in its
> /dev, nothing more ...
>
> # ls /dev
> console full log= null ptmx pts/ random tty urandom zero
>
> maybe an additional hdv1, but that's it, everything
> else is not required and reduces your guest's security
> which is why the tools do not put stuff there besides
> the entries listed above ...

Thanks for that advice, but this vserver is an internal development platform
for a real server, which (of course) does have all those /dev entries . So
security in this guest is not an issue.

But it probably is not a good idea to have all that static dev entries that
are for 2.4 kernels running with a 2.6 vserver enabled kernel, idn't it.

So I did remove all that crap, left only

crw------- 1 root tty 5, 1 2006-11-19 15:14 console
crw-rw-rw- 1 root root 1, 7 2005-07-12 14:14 full
prw------- 1 root root 0 2006-11-19 15:14 initctl
crw-rw-rw- 1 root root 1, 3 2005-07-12 14:14 null
crw-rw-rw- 1 root tty 5, 2 2006-11-19 15:12 ptmx
drwxr-xr-x 2 root root 4096 2006-11-15 18:34 pts
crw-rw-rw- 1 root root 1, 8 2005-07-12 14:14 random
crw-rw-rw- 1 root tty 5, 0 2006-11-19 15:04 tty
-rw-r--r-- 1 root root 582 2006-11-19 15:13 tty10
cr--r--r-- 1 root root 1, 9 2006-11-15 18:34 urandom
crw-rw-rw- 1 root root 1, 5 2005-07-12 14:14 zero

But now I get an:
root@gobi:~# vserver dakar enter
vlogin: ioctl(): Not a typewriter
                                 root@gobi:~#

and login via ssh is now broken too :-(
Nov 19 15:08:56 dakar sshd[1912]: error: openpty: No such file or directory
Nov 19 15:08:56 dakar sshd[1912]: error: session_pty_req: session 0 alloc
failed

Should I check with an non grsec vserver-kernel? Maybe it's grsec related?

Thanks so far,
Oliver

>
> best,
> Herbert
>
> > TIA,
> > Oliver
> >
> > > > TIA,
> > > > Herbert
> > > >
> > > > > dakar:~ # mount
> > > > > /dev/hda2 on / type reiserfs (rw)
> > > > > proc on /proc type proc (rw)
> > > > > devpts on /dev/pts type devpts (rw,mode=0620,gid=5)
> > > > >
> > > > > dakar:~ # ls -la /dev/ptmx
> > > > > crw-rw-rw- 1 root tty 5, 2 Sep 23 2003 /dev/ptmx
> > > > >
> > > > >
> > > > > Thanks so far,
> > > > > Oliver
> > > > > _______________________________________________
> > > > > Vserver mailing list
> > > > > Vserver@list.linux-vserver.org
> > > > > http://list.linux-vserver.org/mailman/listinfo/vserver
> >
> > _______________________________________________
> > Vserver mailing list
> > Vserver@list.linux-vserver.org
> > http://list.linux-vserver.org/mailman/listinfo/vserver
_______________________________________________
Vserver mailing list
Vserver@list.linux-vserver.org
http://list.linux-vserver.org/mailman/listinfo/vserver
Received on Sun Nov 19 14:22:16 2006

[Next/Previous Months] [Main vserver Project Homepage] [Howto Subscribe/Unsubscribe] [Paul Sladen's vserver stuff]
Generated on Sun 19 Nov 2006 - 14:22:22 GMT by hypermail 2.1.8