linux-kernel - Re: [PATCH v9 5/8] IMA: limit critical data measurement based on a label

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Message-ID: <7c90e5e5-6408-6f9b-2eed-6fa45cc92806@linux.microsoft.com>
Date:   Sat, 12 Dec 2020 17:21:52 -0800
From:   Tushar Sugandhi <tusharsu@...ux.microsoft.com>
To:     Tyler Hicks <tyhicks@...ux.microsoft.com>
Cc:     zohar@...ux.ibm.com, stephen.smalley.work@...il.com,
        casey@...aufler-ca.com, agk@...hat.com, snitzer@...hat.com,
        gmazyland@...il.com, paul@...l-moore.com, sashal@...nel.org,
        jmorris@...ei.org, nramas@...ux.microsoft.com,
        linux-integrity@...r.kernel.org, selinux@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, dm-devel@...hat.com
Subject: Re: [PATCH v9 5/8] IMA: limit critical data measurement based on a
 label



On 2020-12-12 11:20 a.m., Tyler Hicks wrote:
> On 2020-12-12 10:02:48, Tushar Sugandhi wrote:
>> System administrators should be able to limit which kernel subsystems
>> they want to measure the critical data for. To enable that, an IMA policy
>> condition to choose specific kernel subsystems is needed. This policy
>> condition would constrain the measurement of the critical data based on
>> a label for the given subsystems.
>>
>> Add a new IMA policy condition - "data_source:=" to the IMA func
>> CRITICAL_DATA to allow measurement of various kernel subsystems. This
>> policy condition would enable the system administrators to restrict the
>> measurement to the labels listed in "data_source:=".
>>
>> Limit the measurement to the labels that are specified in the IMA
>> policy - CRITICAL_DATA+"data_source:=". If "data_sources:=" is not
>> provided with the func CRITICAL_DATA, the data from all the
>> supported kernel subsystems is measured.
>>
>> Signed-off-by: Tushar Sugandhi <tusharsu@...ux.microsoft.com>
> 
> Reviewed-by: Tyler Hicks <tyhicks@...ux.microsoft.com>
> 
> Tyler
> 
Thanks again Tyler.

~Tushar