linux-kernel - Re: [PATCH] ima: add a new CONFIG for loading arch-specific policies

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Message-Id: <1582749379.10443.246.camel@linux.ibm.com>
Date:   Wed, 26 Feb 2020 15:36:19 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        Nayna Jain <nayna@...ux.ibm.com>,
        linux-integrity@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-efi@...r.kernel.org, linux-s390@...r.kernel.org
Cc:     Ard Biesheuvel <ardb@...nel.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Philipp Rudo <prudo@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ima: add a new CONFIG for loading arch-specific policies

On Wed, 2020-02-26 at 11:21 -0800, Lakshmi Ramasubramanian wrote:
> Hi Nayna,
> 
> > +
> > +config IMA_SECURE_AND_OR_TRUSTED_BOOT
> > +	bool
> > +	depends on IMA
> > +	depends on IMA_ARCH_POLICY
> > +	default n
> > +	help
> > +	   This option is selected by architectures to enable secure and/or
> > +	   trusted boot based on IMA runtime policies.
> > 
> 
> Why is the default for this new config "n"?
> Is there any reason to not turn on this config if both IMA and 
> IMA_ARCH_POLICY are set to y?

Good catch.  Having "IMA_SECURE_AND_OR_TRUSTED_BOOT" depend on
"IMA_ARCH_POLICY" doesn't make sense.  "IMA_ARCH_POLICY" needs to be
selected.

thanks,

Mimi