linux-kernel - Re: [PATCH v10 5/8] IMA: limit critical data measurement based on a label

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Message-ID: <3105b0b9-4e74-691c-56ab-6ca183cb2038@linux.microsoft.com>
Date:   Thu, 14 Jan 2021 09:57:27 -0800
From:   Tushar Sugandhi <tusharsu@...ux.microsoft.com>
To:     Mimi Zohar <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
Cc:     tyhicks@...ux.microsoft.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 v10 5/8] IMA: limit critical data measurement based on a
 label



On 2021-01-13 6:09 p.m., Mimi Zohar wrote:
> On Thu, 2021-01-07 at 20:07 -0800, Tushar Sugandhi wrote:
>> Integrity critical data may belong to a single subsystem or it may
>> arise from cross subsystem interaction.  Currently there is no mechanism
>> to group or limit the data based on certain label.  Limiting and
>> grouping critical data based on a label would make it flexible and
>> configurable to measure.
>>
>> Define "label:=", a new IMA policy condition, for the IMA func
>> CRITICAL_DATA to allow grouping and limiting measurement of integrity
>> critical data.
>>
>> Limit the measurement to the labels that are specified in the IMA
>> policy - CRITICAL_DATA+"label:=".  If "label:=" is not provided with
>> the func CRITICAL_DATA, measure all the input integrity critical data.
>>
>> Signed-off-by: Tushar Sugandhi <tusharsu@...ux.microsoft.com>
>> Reviewed-by: Tyler Hicks <tyhicks@...ux.microsoft.com>
> 
> This is looking a lot better.
> 
> thanks,
> 
> Mimi
> 
Thanks a lot for the feedback Mimi.
Appreciate it. :)

~Tushar