linux-kernel - Re: [PATCH] Security/sysfs: Enable security xattrs to be set on sysfs files, directories, and symlinks.

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Date:	Thu, 09 Jul 2009 15:32:56 -0400
From:	"David P. Quigley" <dpquigl@...ho.nsa.gov>
To:	Greg KH <gregkh@...e.de>
Cc:	Casey Schaufler <casey@...aufler-ca.com>, jmorris@...ei.org,
	sds@...ho.nsa.gov, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH] Security/sysfs: Enable security xattrs to be set on
 sysfs files, directories, and symlinks.

On Thu, 2009-07-09 at 10:50 -0700, Greg KH wrote:
> On Thu, Jul 09, 2009 at 01:26:44PM -0400, David P. Quigley wrote:
> > I just read over Casey's comments again and I'm pretty sure we have a
> > big misunderstanding here. From his initial response it seems that he
> > thinks that I am exposing the secids to userspace as the way for setting
> > the labels on files. That isn't true. We are still using the full string
> > based labels for the userspace interface what the secid is used for is
> > to allow the kernel to keep track of changes until the sysfs_dirent is
> > destroyed. 
> 
> Ok, if Casey and others agree that this is the best solution, I'll take
> it.
> 
> thanks,
> 
> greg k-h


I haven't heard from Casey since his last email so I'd hold off on
taking this until we come to an agreement. It seems though from your
comments in another mail that putting the persistent data into the
sysfs_dirent is the proper approach and we just need to figure out what
to put there.

Dave


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