linux-kernel - Re: [PATCH AUTOSEL 4.19 126/167] tpm: Fix TPM 1.2 Shutdown sequence to prevent future TPM operations

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Date:   Tue, 3 Sep 2019 09:53:46 -0700
From:   Jerry Snitselaar <jsnitsel@...hat.com>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Sasha Levin <sashal@...nel.org>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "# 4.0+" <stable@...r.kernel.org>,
        Vadim Sukhomlinov <sukhomlinov@...gle.com>,
        linux-integrity@...r.kernel.org, Jason Gunthorpe <jgg@...pe.ca>
Subject: Re: [PATCH AUTOSEL 4.19 126/167] tpm: Fix TPM 1.2 Shutdown sequence
 to prevent future TPM operations

On Tue Sep 03 19, Doug Anderson wrote:
>Hi,
>
>On Tue, Sep 3, 2019 at 9:28 AM Sasha Levin <sashal@...nel.org> wrote:
>>
>> From: Vadim Sukhomlinov <sukhomlinov@...gle.com>
>>
>> [ Upstream commit db4d8cb9c9f2af71c4d087817160d866ed572cc9 ]
>>
>> TPM 2.0 Shutdown involve sending TPM2_Shutdown to TPM chip and disabling
>> future TPM operations. TPM 1.2 behavior was different, future TPM
>> operations weren't disabled, causing rare issues. This patch ensures
>> that future TPM operations are disabled.
>>
>> Fixes: d1bd4a792d39 ("tpm: Issue a TPM2_Shutdown for TPM2 devices.")
>> Cc: stable@...r.kernel.org
>> Signed-off-by: Vadim Sukhomlinov <sukhomlinov@...gle.com>
>> [dianders: resolved merge conflicts with mainline]
>> Signed-off-by: Douglas Anderson <dianders@...omium.org>
>> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>> Signed-off-by: Sasha Levin <sashal@...nel.org>
>> ---
>>  drivers/char/tpm/tpm-chip.c | 5 +++--
>>  1 file changed, 3 insertions(+), 2 deletions(-)
>
>Jarkko: did you deal with the issues that came up in response to my
>post?  Are you happy with this going into 4.19 stable at this point?
>I notice this has your Signed-off-by so maybe?
>

I think that is just the signed-off-by chain coming from the upstream patch.
Jarkko mentioned getting to the backports after Linux Plumbers, which is next week.

>-Doug