bugJailkit - Bugs: bug #26089, jk_chrootsh hangs at login in...


bug #26089: jk_chrootsh hangs at login in Jailkit 2.6 (regression)

Submitted by:  David Ward <dpward>
Submitted on:  Sun 05 Apr 2009 06:22:24 AM UTC  
Category:  None Severity:  3 - Normal
Item Group:  None Status:  Fixed
Privacy:  Public Assigned to:  Olivier Sessink <oli4>
Open/Closed:  Closed

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Sun 05 Apr 2009 04:31:13 PM UTC, comment #2: 

Yes, it looks like it's fixed now.  Thanks!

David Ward <dpward>
Sun 05 Apr 2009 10:58:03 AM UTC, comment #1: 

I think I fixed the regression in CVS.

can you confirm if the changes fix the behavior?

Olivier Sessink <oli4>
Project AdministratorIn charge of this item.
Sun 05 Apr 2009 06:22:24 AM UTC, original submission:  

I am using Jailkit 2.6 under Ubuntu 8.10, Ubuntu 7.04 (EOL), and Fedora 10.

When I log in to a jailed user account (with the shell set to /usr/sbin/jk_chrootsh), the login process hangs indefinitely.  No errors appear in stderr or any of the logs that I can see.  I eventually just have to use Ctrl+C to cancel the login attempt.  If I uninstall Jailkit 2.6 and reinstall Jailkit 2.5 without touching any files or configuration, the problem goes away immediately.

The steps I am performing after installing Jailkit include the following (all with sudo):

mkdir /jail
jk_init -v /jail basicshell
adduser hacker
passwd hacker
rm /home/hacker/Examples  # Ubuntu only; remove default symlink
jk_jailuser -m -s /bin/bash -j /jail hacker

Then I try to access the account with either 'su hacker' or 'ssh hacker@localhost' and it hangs right after it accepts the password.


David Ward <dpward>


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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2009-04-05 oli4 StatusConfirmed => Fixed
        Open/ClosedOpen => Closed
    2009-04-05 oli4 Assigned toNone => oli4
    2009-04-05 oli4 StatusNone => Confirmed

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