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

> On 04-Jul-2019, at 5:29 PM, Mimi Zohar <> 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 <>
> Reviewed-by: Mimi Zohar <>

Thanks for the fix. Kernel boots fine with this fix.

Tested-by: Sachin Sant <>


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