linux-kernel - Re: [PATCH v2] ima: select ima-buf template for buffer measurement

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Message-ID: <27ecba12eb9f61e73b4b3ecf69310ce3f21bc2e9.camel@linux.ibm.com>
Date:   Fri, 13 Nov 2020 10:57:14 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Cc:     tusharsu@...ux.microsoft.com, linux-integrity@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ima: select ima-buf template for buffer measurement

Hi Lakshmi,

On Thu, 2020-11-12 at 12:39 -0800, Lakshmi Ramasubramanian wrote:
> The default IMA template used for all policy rules is the value set
> for CONFIG_IMA_DEFAULT_TEMPLATE if the policy rule does not specify
> a template. The default IMA template for buffer measurements should be
> 'ima-buf' - so that the measured buffer is correctly included in the IMA
> measurement log entry.
> 
> With the default template format, buffer measurements are added to
> the measurement list, but do not include the buffer data, making it
> difficult, if not impossible, to validate. Including 'ima-buf'
> template records in the measurement list by default, should not impact
> existing attestation servers without 'ima-buf' template support.
> 
> Initialize a global 'ima-buf' template and select that template,
> by default, for buffer measurements.
> 
> Signed-off-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>

Thanks!  It's now queued in next-integrity-testing.

Mimi