Re: Apache2 chroot /dev/null permission denied

[Wayne <linuxtwo@gmail.com>]

Knowledge Seeker wrote:
> Hi,
> I have an old Debian Etch box, running Apache2 on chroot jail. Yesterday,
> (it sounds like joke) I turned off the machine and when I started it again
> the web server did not come to life again.
> The problem was a Permission Denied on the /dev/null.
>
> I created my device with the command:  mknod -m 0666 /chroot/dev/null c 1 3
> listing the permissions:
>
> crw-rw-rw- 1 root root 1, 3 2010-03-16 18:37 null
> crw-rw-rw- 1 root root 1, 8 2010-03-16 18:39 random
> crw-rw-rw- 1 root root 1, 9 2010-03-16 18:39 urandom
>
>
> (When I change the group to sys, don't solve the problem)
>
> Even outside of the chroot when I try to echo something and redirect to this
> device I get the same message:
>
> -su: null: Permission Denied
>
> My kernel is the default:
> 2.6.18-6-686 #1 SMP
>
> Everything worked fine 2 days ago.
>
> I really wish to understand and solve this issue.
> When I mount all /dev with a bind option, it works fine again, but I

 I ran into that after an upgrade on squeeze a few months ago.  As a 
result a few programs would not run.  The atd daemon was the only one I 
cared about.  Don't know, yet, what caused it but the fix was to put the 
following into /root/.bash_profile.

chmod 666 /dev/null
chgrp root /dev/null

/etc/init.d/atd restart

HTH

Wayne