linux-kernel - Re: [Patch v6 4/4] KEYS: trusted: Move TPM2 trusted keys code

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Date:   Wed, 18 Sep 2019 11:53:08 +0530
From:   Sumit Garg <sumit.garg@...aro.org>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     dhowells@...hat.com, peterhuewe@....de, keyrings@...r.kernel.org,
        linux-integrity@...r.kernel.org,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>,
        linux-security-module@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>, davem@...emloft.net,
        jgg@...pe.ca, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        jejb@...ux.ibm.com, Mimi Zohar <zohar@...ux.ibm.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Jerry Snitselaar <jsnitsel@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>
Subject: Re: [Patch v6 4/4] KEYS: trusted: Move TPM2 trusted keys code

On Tue, 17 Sep 2019 at 23:45, Jarkko Sakkinen
<jarkko.sakkinen@...ux.intel.com> wrote:
>
> On Tue, Sep 17, 2019 at 09:14:15PM +0300, Jarkko Sakkinen wrote:
> > On Mon, Sep 16, 2019 at 04:04:24PM +0530, Sumit Garg wrote:
> > > Move TPM2 trusted keys code to trusted keys subsystem. The reason
> > > being it's better to consolidate all the trusted keys code to a single
> > > location so that it can be maintained sanely.
> > >
> > > Suggested-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> > > Signed-off-by: Sumit Garg <sumit.garg@...aro.org>
> > > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> >
> > This commit has couple of issues that I only noticed when looking into
> > bug reported by Mimi.
> >
> > Right now tpm_send() is the exported function that is used by other
> > subsystems. tpm_transmit_cmd() is an internal function. This commit adds
> > two unrelated code paths to send TPM commands, which is unacceptable.

Makes sense, will update.

> >
> > You should make tpm2 functionality to use tpm_send() instead and remove
> > tpm_seal_trusted() and tpm_unseal_trusted() completely in this commit.

Okay.

>
> The consequence is that the result needs unfortunately re-review. Sorry
> about that, just took this time to notice this glitch.

No worries :). I will send next version of patch-set.

FYI, I will be travelling for Linaro Connect next week so you could
expect some delays in my responses.

-Sumit

>
> /Jarkko