linux-kernel - Re: [RFC 0/5 v4] procfs: introduce hidepid=, hidenet=, gid= mount options

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Date:	Thu, 16 Jun 2011 10:50:27 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Vasiliy Kulikov <segoon@...nwall.com>
Cc:	linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Greg Kroah-Hartman" <gregkh@...e.de>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [RFC 0/5 v4] procfs: introduce hidepid=, hidenet=, gid= mount options

On Wednesday 15 June 2011, Vasiliy Kulikov wrote:
> 
> This patch series adds support of procfs mount options and adds
> mount options to restrict /proc/<pid>/ directories to owners and
> /proc/<pid>/net/* to root.  Additional group may be defined via
> gid=, and this group will be privileged to study others /proc/<pid>/
> and networking information.
> 
> Similar features are implemented for old kernels in -ow patches (for
> Linux 2.2 and 2.4) and for Linux 2.6 in -grsecurity, but both of them
> are implemented as configure options, not cofigurable in runtime, with
> changes of gid of /proc/<pid>/, and without backward-compatible
> /proc/<pid>/net/* handling.

The patches all look good to me implementation-wise.

I have no opinion on whether it's a good idea to include the feature or not.

	Arnd
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