linux-kernel - Re: [PATCH v5 4/4] IMA: Handle early boot data measurement

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Date:   Thu, 30 Jul 2020 15:04:36 -0500
From:   Tyler Hicks <tyhicks@...ux.microsoft.com>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Cc:     zohar@...ux.ibm.com, stephen.smalley.work@...il.com,
        casey@...aufler-ca.com, sashal@...nel.org, jmorris@...ei.org,
        linux-integrity@...r.kernel.org, selinux@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 4/4] IMA: Handle early boot data measurement

On 2020-07-30 11:02:50, Lakshmi Ramasubramanian wrote:
> On 7/29/20 8:47 PM, Lakshmi Ramasubramanian wrote:
> 
> Hi Tyler,
> 
> > diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
> > index 080c53545ff0..86cba844f73c 100644
> > --- a/security/integrity/ima/Kconfig
> > +++ b/security/integrity/ima/Kconfig
> > @@ -322,10 +322,9 @@ config IMA_MEASURE_ASYMMETRIC_KEYS
> >   	depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
> >   	default y
> > -config IMA_QUEUE_EARLY_BOOT_KEYS
> > +config IMA_QUEUE_EARLY_BOOT_DATA
> >   	bool
> > -	depends on IMA_MEASURE_ASYMMETRIC_KEYS
> > -	depends on SYSTEM_TRUSTED_KEYRING
> > +	depends on SECURITY || (IMA_MEASURE_ASYMMETRIC_KEYS && SYSTEM_TRUSTED_KEYRING)
> >   	default y
> Similar to the change you'd suggested for validating LSM_STATE and
> LSM_POLICY func, I think IMA_QUEUE_EARLY_BOOT_DATA config should be enabled
> for SECURITY_SELINUX.
> 
> depends on SECURITY_SELINUX ||
>            (IMA_MEASURE_ASYMMETRIC_KEYS && SYSTEM_TRUSTED_KEYRING)
> 
> And, when more security modules are added update this CONFIG as appropriate.
> 
> Does that sound okay?

Yes, I think so.

Tyler

> 
>  -lakshmi