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Date:   Thu, 04 Jul 2019 07:59:07 -0400
From:   Mimi Zohar <>
To:     Nayna Jain <>,,
Cc:, Peter Huewe <>,
        Jarkko Sakkinen <>,
        Jason Gunthorpe <>,
        Michael Ellerman <>,
        Michal Suchanek <>,
        Sachin Sant <>,
        George Wilson <>
Subject: Re: [PATCH] tpm: fixes uninitialized allocated banks for IBM vtpm

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 <>

Reviewed-by: Mimi Zohar <>

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