linux-kernel - Re: [PATCH 0/3] Address !chip->auth

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Message-Id: <D2GU3QOR9Y2O.2OXK62J2V9C2T@kernel.org>
Date: Thu, 04 Jul 2024 17:45:52 +0300
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Michael Ellerman" <mpe@...erman.id.au>,
 <linux-integrity@...r.kernel.org>
Cc: "James Bottomley" <James.Bottomley@...senPartnership.com>, "Mimi Zohar"
 <zohar@...ux.ibm.com>, "David Howells" <dhowells@...hat.com>, "Paul Moore"
 <paul@...l-moore.com>, "James Morris" <jmorris@...ei.org>, "Serge E.
 Hallyn" <serge@...lyn.com>, <keyrings@...r.kernel.org>,
 <linux-security-module@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 "Linus Torvalds" <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 0/3] Address !chip->auth

On Thu Jul 4, 2024 at 4:03 PM EEST, Michael Ellerman wrote:
> "Jarkko Sakkinen" <jarkko@...nel.org> writes:
> > On Wed Jul 3, 2024 at 8:08 PM EEST, Jarkko Sakkinen wrote:
> >> Tested on x86-64 with:
> >>
> >> - TCG_TPM2_HMAC disabled.
> >> - TCG_TPM2_HMAC enabled.
> >> - TCG_TPM2_HMAC enabled, and "/* rc = tpm2_sessions_init(chip); */".
> >>
> >> Jarkko Sakkinen (3):
> >>   tpm: Address !chip->auth in tpm2_*_auth_session()
> >>   tpm: Address !chip->auth in tpm_buf_append_name()
> >>   tpm: Address !chip->auth in tpm_buf_append_hmac_session*()
> >>
> >>  drivers/char/tpm/Makefile        |   2 +-
> >>  drivers/char/tpm/tpm2-sessions.c | 400 +++++++++++++++++--------------
> >>  include/linux/tpm.h              |  75 ++----
> >>  3 files changed, 245 insertions(+), 232 deletions(-)
> >
> > Aiming these still to 6.10 so that there would not be known regressions
> > in hmac authenticated sessions. Note that issue is wider than "just"
> > tpm_ibmvtpm.
>
> This seems OK on my PowerVM box using tpm_ibmvtpm and TCG_TPM2_HMAC=y.
> I do see one new message:
>
>   [    2.475208] tpm2_start_auth_session: encryption is not active
>
> But no error messages like on mainline.
>
> Tested-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)

Thank you, appreciate this!

BR, Jarkko