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

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Message-Id: <CZA9CM3PDILC.82JMLUWMB6B7@seitikki>
Date: Tue, 20 Feb 2024 22:26:09 +0000
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Lino Sanfilippo" <l.sanfilippo@...bus.com>, "Alexander Steffen"
 <Alexander.Steffen@...ineon.com>, "Daniel P. Smith"
 <dpsmith@...rtussolutions.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 Tue Feb 20, 2024 at 8:54 PM UTC, Lino Sanfilippo wrote:
> for (i = 0; i <= MAX_LOCALITY; i++)
> 	__tpm_tis_relinquish_locality(priv, i);

I'm pretty unfamiliar with Intel TXT so asking a dummy question:
if Intel TXT uses locality 2 I suppose we should not try to
relinquish it, or?

AFAIK, we don't have a symbol called MAX_LOCALITY.

BR, Jarkko