[PATCH] tpm: fixes uninitialized allocated banks for IBM vtpm driver

Mimi Zohar zohar at linux.ibm.com
Thu Jul 4 21:59:07 AEST 2019

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 at linux.ibm.com>

Reviewed-by: Mimi Zohar <zohar at linux.ibm.com>

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