linux-kernel - Re: [PATCH 1/2] tpm/eventlog/tpm1: Simplify walking over *pos measurements

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Message-ID: <20190116220952.GH25803@linux.intel.com>
Date:   Thu, 17 Jan 2019 00:09:52 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jia Zhang <zhang.jia@...ux.alibaba.com>
Cc:     peterhuewe@....de, jgg@...pe.ca, tweek@...gle.com,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] tpm/eventlog/tpm1: Simplify walking over *pos
 measurements

Please use "tpm:" tag for commits, not "tpm/eventlog/tpm1".

On Fri, Jan 11, 2019 at 04:59:32PM +0800, Jia Zhang wrote:
> The responsibility of tpm1_bios_measurements_start() is to walk
> over the first *pos measurements, ensuring the skipped and
> to-be-read measurements are not out-of-boundary.
> 
> Current logic is complicated a bit. Just employ a do-while loop
> with necessary sanity check, and then get the goal.
> 
> Signed-off-by: Jia Zhang <zhang.jia@...ux.alibaba.com>

What does this fix? Even if the current logic is "complicated", it is
still a pretty simple functiion.

Applying clean ups for fun has the side-effect of making backporting
more difficult. And swapping implementation randomly has the side-effect
of potentially introducing regressions. The current code might be messy
but it is still field tested.

I'm sorry but I have to reject this patch.

/Jarkko