linux-kernel - Re: [PATCH] tpm: ibmvtpm: Call tpm2_sessions

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Message-ID: <87y16kk5mv.fsf@mail.lhotse>
Date: Tue, 02 Jul 2024 10:19:04 +1000
From: Michael Ellerman <mpe@...erman.id.au>
To: James Bottomley <James.Bottomley@...senPartnership.com>,
 regressions@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org, naveen.n.rao@...ux.ibm.com, Stefan Berger
 <stefanb@...ux.ibm.com>, linux-integrity@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org, jarkko@...nel.org
Subject: Re: [PATCH] tpm: ibmvtpm: Call tpm2_sessions_init() to initialize
 session support

James Bottomley <James.Bottomley@...senPartnership.com> writes:
> On Fri, 2024-06-28 at 10:54 +1000, Michael Ellerman wrote:
>> Stefan Berger <stefanb@...ux.ibm.com> writes:
>> > Fix the following type of error message caused by a missing call to
>> > tpm2_sessions_init() in the IBM vTPM driver:
>> > 
>> > [    2.987131] tpm tpm0: tpm2_load_context: failed with a TPM error
>> > 0x01C4
>> > [    2.987140] ima: Error Communicating to TPM chip, result: -14
>> > 
>> > Fixes: d2add27cf2b8 ("tpm: Add NULL primary creation")
>> > Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
>> > ---
>> >  drivers/char/tpm/tpm_ibmvtpm.c | 4 ++++
>> >  1 file changed, 4 insertions(+)
>> > 
>> > diff --git a/drivers/char/tpm/tpm_ibmvtpm.c
>> > b/drivers/char/tpm/tpm_ibmvtpm.c
>> > index d3989b257f42..1e5b107d1f3b 100644
>> > --- a/drivers/char/tpm/tpm_ibmvtpm.c
>> > +++ b/drivers/char/tpm/tpm_ibmvtpm.c
>> > @@ -698,6 +698,10 @@ static int tpm_ibmvtpm_probe(struct vio_dev
>> > *vio_dev,
>> >                 rc = tpm2_get_cc_attrs_tbl(chip);
>> >                 if (rc)
>> >                         goto init_irq_cleanup;
>> > +
>> > +               rc = tpm2_sessions_init(chip);
>> > +               if (rc)
>> > +                       goto init_irq_cleanup;
>> >         }
>> >  
>> >         return tpm_chip_register(chip);
>> 
>> #regzbot ^introduced: d2add27cf2b8 
>
> Could you please test out the patch I proposed for this:
>
> https://lore.kernel.org/linux-integrity/1302b413a2d7bf3b275133e7fdb04b44bfe2d5e3.camel@HansenPartnership.com/

Your patch does fix the issue on my PowerVM system, as does Stefan's.

cheers