Re: [vserver] Can't see all my processes?

From: vitalyb <>
Date: Tue 13 May 2008 - 16:03:45 BST
Message-ID: <>

Ed W wrote:
> David Karban wrote:
>> Ed W napsal(a):
>>> Hi
>> Hi,
>> I had same issue with bind run in vserver in chroot jail with
>> grsecurity chroot jail protection. Bind process was visible from host
>> by vps, but not in guest. Without chroot jail protection was visible
>> in guest too.
>> But the question is ... are you chrooting in vserver ?
> Aha, I'm not knowingly chrooting, but then this is a bit of bernstein
> software, so I guess that it quite probably does a chroot (dnscache)
> Any tips on adjusting grsec? I'm not sure really why the chroot
> protection would cause this effect? Presumably it's somehow causing the
> process security tags to change in some way?

It's GRKERNSEC_CHROOT_FINDTASK. It should be either disabled in kernel or
by kernel.grsecurity.chroot_findtask=0 sysctl.

         bool "Protect outside processes"
         depends on GRKERNSEC_CHROOT
           If you say Y here, processes inside a chroot will not be able to
           kill, send signals with fcntl, ptrace, capget, getpgid, getsid,
           or view any process outside of the chroot. If the sysctl
           option is enabled, a sysctl option with name "chroot_findtask" is

Received on Tue May 13 16:04:04 2008
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