Re: [PATCH v4] tpm2: add longer timeout for verify signature command

Jarkko Sakkinen
2021-05-26T04:50:47Z

On Tue, May 25, 2021 at 02:13:25PM +0300, amirmizi6@gmail.com wrote:
> From: Amir Mizinski <amirmizi6@gmail.com>
>
> While running a TPM2_CC_VERIFY_SIGNATURE operation with RSA 3072-bit
> keys the TPM driver fails with the following error:
>
> "kernel: [ 2416.187522] tpm tpm0: Operation Timed out"
>
> Since the TPM PC Client specification does not specify a number for
> verify signature operation timeout, and the duration of
> TPM2_CC_VERIFY_SIGNATURE with RSA 3072-bit keys exceeds the current timeout
> of TPM_LONG (2 seconds), it is preferable to pick the longest timeout
> possible.
>
> Therefore, set the duration for TPM2_CC_VERIFY_SIGNATUE to TPM_LONG_LONG
> (5 minutes).
>
> Link: https://trustedcomputinggroup.org/resource/pc-client-specific-platform-firmware-profile-specification/
> Signed-off-by: Amir Mizinski <amirmizi6@gmail.com>
> ---

Thank you.

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@iki.fi>

/Jarkko