From: Mimi Zohar <zohar@linux.vnet.ibm.com>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: David Howells <dhowells@redhat.com>,
linux-integrity <linux-integrity@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Andy Lutomirski <luto@kernel.org>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
David Woodhouse <dwmw2@infradead.org>,
Kyle McMartin <kyle@kernel.org>,
Ben Hutchings <ben@decadent.org.uk>,
Alan Cox <gnomes@lxorguk.ukuu.org.uk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Kees Cook <keescook@chromium.org>,
"AKASHI, Takahiro" <takahiro.akashi@linaro.org>
Subject: Re: [RFC PATCH v2] fw_lockdown: new micro LSM module to prevent loading unsigned firmware
Date: Mon, 13 Nov 2017 15:11:12 -0500 [thread overview]
Message-ID: <1510603872.3711.36.camel@linux.vnet.ibm.com> (raw)
In-Reply-To: <20171113195154.GE22894@wotan.suse.de>
On Mon, 2017-11-13 at 20:51 +0100, Luis R. Rodriguez wrote:
> On Mon, Nov 13, 2017 at 02:36:47PM -0500, Mimi Zohar wrote:
> > Huh, I kind of lost you here. What does "it" refer to in the above
> > sentence? IMA is in the kernel. So, who does what checks in
> > userspace?
>
> Sorry I thought some checks were done in userspace, given that is clarified,
> what I meant is that say a device driver has a signing specification written
> out in the driver, should/can IMA use that on the LSM to verify the detached
> signature file for the firmware?
IMA-appraisal currently supports file signatures as extended
attributes. Thiago Bauermann posted patches for including appended
signature support to IMA-appraisal. If someone is interested in
adding detached signature support, they're welcome to do so.
> If it can be all done in kernel, it has me wondering if perhaps one option for
> IMA might be to do only vetting for these types of checks, where the info and
> description to appraise files is all in-kernel. IMA would not be required
> for other files.
We probably can defer this discussion until it is applicable.
Mimi
next prev parent reply other threads:[~2017-11-13 20:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-13 11:43 [RFC PATCH v2] fw_lockdown: new micro LSM module to prevent loading unsigned firmware Mimi Zohar
2017-11-13 19:05 ` Luis R. Rodriguez
2017-11-13 19:36 ` Mimi Zohar
2017-11-13 19:51 ` Luis R. Rodriguez
2017-11-13 20:11 ` Mimi Zohar [this message]
2017-11-13 20:18 ` Luis R. Rodriguez
2017-11-13 20:58 ` James Morris
2017-11-13 23:55 ` Luis R. Rodriguez
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