From: Tvrtko Ursulin <tvrtko.ursulin@sophos.com>
To: Greg KH <greg@kroah.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: BUG: Securityfs and bind mounts (2.6.34)
Date: Thu, 8 Jul 2010 16:32:42 +0100 [thread overview]
Message-ID: <201007081632.42069.tvrtko.ursulin@sophos.com> (raw)
In-Reply-To: <20100708152059.GA12932@kroah.com>
On Thursday 08 Jul 2010 16:20:59 Greg KH wrote:
> > :) Well I do not know, but, it kind of smelled like a bug in the
> > : vfs/mount
> >
> > handling/securityfs area so I thought to let experts know. I _think_ I
> > did nothing that much wrong. Just used the exposed API
> > (securityfs_remove) and some bind mount shuffling from userspace.
>
> securitfs just uses libfs underneath it, and really doesn't have any
> bindings for module ownerships, so I wouldn't recommend doing what you
> just did.
Just do double check what you are saying, securityfs is not safe for use from
modules? If so I would then recommend removing the exports otherwise it is an
invitation to shoot yourself into the foot. Also, in-three TPM driver can be
built as a module so how does that work?
Tvrtko
Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom.
Company Reg No 2096520. VAT Reg No GB 348 3873 20.
next prev parent reply other threads:[~2010-07-08 15:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-08 10:12 Tvrtko Ursulin
2010-07-08 14:43 ` Greg KH
2010-07-08 14:55 ` Tvrtko Ursulin
2010-07-08 15:20 ` Greg KH
2010-07-08 15:32 ` Tvrtko Ursulin [this message]
2010-07-08 15:46 ` Greg KH
2010-07-08 16:14 ` Tvrtko Ursulin
2010-07-14 16:19 ` Tvrtko Ursulin
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