linux-kernel - Re: [PATCH 1/3] tpm: protect against locality counter underflow

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Message-Id: <CZCH5V83WBBV.20JR0RC1GJVJY@suppilovahvero>
Date: Fri, 23 Feb 2024 14:58:49 +0200
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Daniel P. Smith" <dpsmith@...rtussolutions.com>, "Lino Sanfilippo"
 <l.sanfilippo@...bus.com>, "Alexander Steffen"
 <Alexander.Steffen@...ineon.com>, "Jason Gunthorpe" <jgg@...pe.ca>, "Sasha
 Levin" <sashal@...nel.org>, <linux-integrity@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>
Cc: "Ross Philipson" <ross.philipson@...cle.com>, "Kanth Ghatraju"
 <kanth.ghatraju@...cle.com>, "Peter Huewe" <peterhuewe@....de>
Subject: Re: [PATCH 1/3] tpm: protect against locality counter underflow

On Fri Feb 23, 2024 at 3:58 AM EET, Daniel P. Smith wrote:
> > Just adding here that I wish we also had a log transcript of bug, which
> > is right now missing. The explanation believable enough to move forward
> > but I still wish to see a log transcript.
>
> That will be forth coming.

I did not respond yet to other responses that you've given in the past 
12'ish hours or so (just woke up) but I started to think how all this
great and useful information would be best kept in memory. Some of it
has been discussed in the past but there is lot of small details that
are too easily forgotten.

I'd think the best "documentation" approach here would be inject the
spec references to the sites where locality behaviour is changed so
that it is easy in future cross-reference them, and least of risk
of having code changes that would break anything. I think this way
all the information that you provided is best preserved for the
future.

Thanks a lot for great and informative responses!

> v/r,
> dps

BR, Jarkko