[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <f315356e7c00378c8785bd20d5869c9046ece2f2.camel@linux.intel.com>
Date: Fri, 05 Jul 2019 13:42:18 +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>,
Michal Suchanek <msuchanek@...e.de>,
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 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?
> ---
> drivers/char/tpm/tpm-chip.c | 37 +++++++++++++++++++++++++++++++++++++
> drivers/char/tpm/tpm.h | 1 +
> drivers/char/tpm/tpm1-cmd.c | 12 ------------
> drivers/char/tpm/tpm2-cmd.c | 6 +-----
> 4 files changed, 39 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
> index 8804c9e916fd..958508bb8379 100644
> --- a/drivers/char/tpm/tpm-chip.c
> +++ b/drivers/char/tpm/tpm-chip.c
> @@ -550,6 +550,39 @@ static int tpm_add_hwrng(struct tpm_chip *chip)
> return hwrng_register(&chip->hwrng);
> }
>
> +/*
> + * tpm_pcr_allocation() - initializes the chip allocated banks for PCRs
> + */
> +static int tpm_pcr_allocation(struct tpm_chip *chip)
Why that name and not tpm_get_pcr_allocation()? Do not get why
"get_" has been dropped. Please add it back.
Would be senseful to create tpm1_get_pcr_allocation() to tpm1-cmd.c
now that a new function needs to be introduced anyway. Please do
it for that for TPM 1.x part.
/Jarkko
Powered by blists - more mailing lists