linux-kernel - Re: [PATCH] Introduce new LSM hooks where vfsmount is available.

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Date:	Tue, 23 Sep 2008 19:20:53 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Stephen Smalley <sds@...ho.nsa.gov>
Cc:	david@...g.hm, James Morris <jmorris@...ei.org>,
	Kentaro Takeda <takedakn@...data.co.jp>,
	linux-security-module@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Toshiharu Harada <haradats@...data.co.jp>
Subject: Re: [PATCH] Introduce new LSM hooks where vfsmount is available.

On Tue, Sep 23, 2008 at 11:02:47AM -0400, Stephen Smalley wrote:
> 
> On Mon, 2008-09-22 at 23:12 -0700, david@...g.hm wrote:
> > On Tue, 23 Sep 2008, James Morris wrote:
> > 
> > > On Wed, 17 Sep 2008, Kentaro Takeda wrote:
> > >
> > >> TOMOYO Linux needs method for calculating pathname in LSM module.
> > >> However, we have received comment from Al Viro, the vfs maintainer,
> > >> that adding vfsmount parameter to vfs helper functions (and LSM hooks)
> > >> is not preferable. We have asked some people (including Al), and we
> > >> came back to the most straightforward approach; adding new LSM hooks
> > >> where vfsmount is available.
> > >>
> > >> The attached patch introduces several new LSM hooks TOMOYO Linux
> > >> needs. It has less impact to existing LSM module and no impact to vfs
> > >> helper functions. Please review it.
> > >
> > > I don't see any technical errors in this patch.
> > >
> > > If it is going to be merged, please make a new config option for
> > > path-based hooks (similar to that for the network hooks), so they can be
> > > compiled out.

Another pointless config option.

It's actually pretty surprising that SECURITY_NETWORK is
a) user-visible and b) is not SECURITY && NET.

Same for SECURITY_NETWORK_XFRM.
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