linux-kernel - Re: [PATCH v3] x86/ima: require signed kernel modules

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Message-Id: <1550253495.7468.0.camel@linux.ibm.com>
Date:   Fri, 15 Feb 2019 12:58:15 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Luis Chamberlain <mcgrof@...nel.org>
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jessica Yu <jeyu@...nel.org>,
        David Howells <dhowells@...hat.com>,
        Seth Forshee <seth.forshee@...onical.com>,
        "Bruno E . O . Meneguele" <bmeneg@...hat.com>
Subject: Re: [PATCH v3] x86/ima: require signed kernel modules

On Fri, 2019-02-15 at 09:01 -0800, Luis Chamberlain wrote:
> On Fri, Feb 15, 2019 at 11:50:18AM -0500, Mimi Zohar wrote:
> > Have the IMA architecture specific policy require signed kernel modules
> > on systems with secure boot mode enabled; and coordinate the different
> > signature verification methods, so only one signature is required.
> > 
> > Requiring appended kernel module signatures may be configured, enabled
> > on the boot command line, or with this patch enabled in secure boot
> > mode.  This patch defines set_module_sig_enforced().
> > 
> > To coordinate between appended kernel module signatures and IMA
> > signatures, only define an IMA MODULE_CHECK policy rule if
> > CONFIG_MODULE_SIG is not enabled.  A custom IMA policy may still define
> > and require an IMA signature.
> > 
> > Signed-off-by: Mimi Zohar <zohar@...ux.ibm.com>
> 
> Reviewed-by: Luis Chamberlain <mcgrof@...nel.org>

Thanks!