From: Jarkko Sakkinen <jarkko@kernel.org>
To: amirmizi6@gmail.com
Cc: Eyal.Cohen@nuvoton.com, peterhuewe@gmx.de, jgg@ziepe.ca,
linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org,
Dan.Morav@nuvoton.com, oren.tanami@nuvoton.com,
shmulik.hager@nuvoton.com, amir.mizinski@nuvoton.com
Subject: Re: [PATCH v3] tpm2: add longer timeout for verify signature command
Date: Tue, 25 May 2021 00:29:28 +0300 [thread overview]
Message-ID: <YKwauPYtLlOxKj2N@kernel.org> (raw)
In-Reply-To: <20210523153610.86927-2-amirmizi6@gmail.com>
On Sun, May 23, 2021 at 06:36:10PM +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 3070-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/
>
Link should be with capital letter and there should not be an empty line
before sob.
> Signed-off-by: Amir Mizinski <amirmizi6@gmail.com>
> ---
> drivers/char/tpm/tpm2-cmd.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 7603295..e71154b 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -87,7 +87,7 @@ static u8 tpm2_ordinal_duration_index(u32 ordinal)
> return TPM_MEDIUM;
>
> case TPM2_CC_VERIFY_SIGNATURE: /* 177 */
> - return TPM_LONG;
> + return TPM_LONG_LONG;
>
> case TPM2_CC_PCR_EXTEND: /* 182 */
> return TPM_MEDIUM;
> --
> 2.7.4
>
>
/Jarkko
prev parent reply other threads:[~2021-05-24 21:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-23 15:36 [PATCH v3] add longer timeout for verify signature command amirmizi6
2021-05-23 15:36 ` [PATCH v3] tpm2: " amirmizi6
2021-05-24 21:29 ` Jarkko Sakkinen [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YKwauPYtLlOxKj2N@kernel.org \
--to=jarkko@kernel.org \
--cc=Dan.Morav@nuvoton.com \
--cc=Eyal.Cohen@nuvoton.com \
--cc=amir.mizinski@nuvoton.com \
--cc=amirmizi6@gmail.com \
--cc=jgg@ziepe.ca \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=oren.tanami@nuvoton.com \
--cc=peterhuewe@gmx.de \
--cc=shmulik.hager@nuvoton.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).