linux-kernel - Re: [PATCH] tpm: fixes uninitialized allocated banks for IBM vtpm driver

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Message-ID: <f161616a3681994680c70e66c51afd537a2f3423.camel@linux.intel.com>
Date:   Fri, 05 Jul 2019 14:02:06 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Nayna Jain <nayna@...ux.ibm.com>, linux-integrity@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, Michal Suchanek <msuchanek@...e.de>
Cc:     linux-kernel@...r.kernel.org, Peter Huewe <peterhuewe@....de>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Sachin Sant <sachinp@...ux.vnet.ibm.com>,
        George Wilson <gcwilson@...ux.ibm.com>
Subject: Re: [PATCH] tpm: fixes uninitialized allocated banks for IBM vtpm
 driver

On Fri, 2019-07-05 at 13:42 +0300, Jarkko Sakkinen wrote:
> On Wed, 2019-07-03 at 23:32 -0400, Nayna Jain wrote:
> > The nr_allocated_banks and allocated banks are initialized as part of
> > tpm_chip_register. Currently, this is done as part of auto startup
> > function. However, some drivers, like the ibm vtpm driver, do not run
> > auto startup during initialization. This results in uninitialized memory
> > issue and causes a kernel panic during boot.
> > 
> > This patch moves the pcr allocation outside the auto startup function
> > into tpm_chip_register. This ensures that allocated banks are initialized
> > in any case.
> > 
> > Fixes: 879b589210a9 ("tpm: retrieve digest size of unknown algorithms with
> > PCR read")
> > Signed-off-by: Nayna Jain <nayna@...ux.ibm.com>
> 
> Please add
> 
> Reported-by: Michal Suchanek <msuchanek@...e.de>
> 
> It is missing. Michal is there a chance you could try this out once
> Nayna send a new version?

Hey, I saw Michal's tested-by. I can do that minor reorg cosmetic
bits myeslf and add Micha's tag.

Some issue with the network but I'll push a commit soonish.

/Jarkko