linux-kernel - Re: [PATCH 2/4] fs: define a firmware security filesystem named fwsecurityfs

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Date:   Mon, 12 Dec 2022 07:11:58 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Andrew Donnellan <ajd@...ux.ibm.com>
Cc:     Nayna <nayna@...ux.vnet.ibm.com>, Nayna Jain <nayna@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-fsdevel@...r.kernel.org,
        linux-efi@...r.kernel.org,
        linux-security-module <linux-security-module@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>, npiggin@...il.com,
        christophe.leroy@...roup.eu, Dov Murik <dovmurik@...ux.ibm.com>,
        George Wilson <gcwilson@...ux.ibm.com>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Russell Currey <ruscur@...sell.cc>,
        Stefan Berger <stefanb@...ux.ibm.com>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
Subject: Re: [PATCH 2/4] fs: define a firmware security filesystem named
 fwsecurityfs

On Mon, Dec 12, 2022 at 11:58:56AM +1100, Andrew Donnellan wrote:
> On Wed, 2022-11-23 at 13:57 -0500, Nayna wrote:
> > 
> > Given there are no other exploiters for fwsecurityfs and there should
> > be 
> > no platform-specific fs, would modifying sysfs now to let userspace 
> > create files cleanly be the way forward? Or, if we should strongly 
> > consider securityfs, which would result in updating securityfs to
> > allow 
> > userspace creation of files and then expose variables via a more 
> > platform-specific directory /sys/kernel/security/pks? We want to pick
> > the best available option and would find some hints on direction
> > helpful 
> > before we develop the next patch.
> 
> Ping - it would be helpful for us to know your thoughts on this.

sysfs is not for userspace creation of files, you all know this :)

greg k-h