Jailkit crashed the system - root in jail?

[rozwell69]

Howdy!

I had well installed Ubuntu 9.04 with ISPConfig 3 and Jailkit 2.6 and everything was working fine.
Unfortunatelly when I've added new shell user with Jailkit option (in ispconfig, in the same time I was logged as root via ssh) root lost his ability to do anything. Of course system was not able to start so now it's mounted on the other system.
So I've got access to every file but cannot login using chroot:
# chroot /crashed_system
chroot: cannot run command `/bin/bash': No such file or directory

Checked and permissions are fine (unchanged I guess):
# ls -l /recovered_system/bin/bash
-rwxr-xr-x 1 root root 833592 Mar 2 2009 /recovered_system/bin/bash

Does anyone knows how to fix it?
or
purge jailkit from the system
or
make root able to login
or
configure jailkit to remove root from jail? (if it's in jail, because I don't know how to check it)

The case is really important so any suggestions are expected.


Cheers!
rozwell

EDIT:
I have recovered important data and will now reinstall the system but I still don't know the answer...

[grigra]

hy guys. I have the same problem. I've done the same steps and got the same error and my server is still not running correctly :(

any news about the problem? Is there a fix?

[rozwell69]

Hell yeah!
I did some digging and found the solution. It's so simple that's almost stupid:
Edit file:
/etc/jailkit/jk_init.ini
And comment / change / remove lines:
users = root
groups = root
I suggest comment them in all sections. Just to make sure it won't be a problem anymore.
It's in:
[jk_lsh]
[basicshell]
[openvpn]
[apache]

Explanation from documentation:
The users and groups entries specify which users and groups that need to be present in <jail>/etc/passwd.

And that's it. Problem solved.

[Balabaka]

Doen't seem to work with my system :(

[grigra]

this fix also didn't work for me ... I had to set up my server again. But thanks for your help.

[Freddy436]

Hello, I had the same issue with ISPConfig 3.0.1.4 and jailkit 2.8 on a debian lenny system (amd64).

You should check /lib for broken symlinks. In my case jailkit removed the folowing important libs:
/lib/ld-2.7.so
/lib/libnsl-2.7.so
/lib/libnss_compat-2.7.so
/lib/libnss_dns-2.7.so
/lib/libnss_files-2.7.so
/lib/libnss_hesiod-2.7.so
/lib/libnss_nisplus-2.7.so
/lib/libnss_nis-2.7.so

It's a bug in jailkit 2.8 fixed in 2.9+