linux-kernel - Re: [PATCH cgroup/for-3.16] cgroup: disallow debug controller on the default hierarchy

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Mon, 19 May 2014 16:38:11 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizefan@...wei.com>
Cc:	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH cgroup/for-3.16] cgroup: disallow debug controller on the
 default hierarchy

On Wed, May 14, 2014 at 07:33:07PM -0400, Tejun Heo wrote:
> The debug controller, as its name suggests, exposes cgroup core
> internals to userland to aid debugging.  Unfortunately, except for the
> name, there's no provision to prevent its usage in production
> configurations and the controller is widely enabled and mounted
> leaking internal details to userland.  Like most other debug
> information, the information exposed by debug isn't interesting even
> for debugging itself once the related parts are working reliably.
> 
> This controller has no reason for existing.  This patch implements
> cgrp_dfl_root_inhibit_ss_mask which can suppress specific subsystems
> on the default hierarchy and adds the debug subsystem to it so that it
> can be gradually deprecated as usages move towards the unified
> hierarchy.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>

Applied to cgroup/for-3.16.

Thanks.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/