linux-kernel - Re: [RFC PATCH 0/2] TPM derived keys

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Date: Sat, 04 May 2024 18:35:48 +0300
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Jarkko Sakkinen" <jarkko@...nel.org>, "Ben Boeckel" <me@...boeckel.net>
Cc: "Ignat Korchagin" <ignat@...udflare.com>, "James Bottomley"
 <James.Bottomley@...senpartnership.com>, "Mimi Zohar"
 <zohar@...ux.ibm.com>, "David Howells" <dhowells@...hat.com>, "Paul Moore"
 <paul@...l-moore.com>, "James Morris" <jmorris@...ei.org>,
 <serge@...lyn.com>, <linux-integrity@...r.kernel.org>,
 <keyrings@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <kernel-team@...udflare.com>
Subject: Re: [RFC PATCH 0/2] TPM derived keys

On Sat May 4, 2024 at 5:51 PM EEST, Jarkko Sakkinen wrote:
> On Sat May 4, 2024 at 4:55 PM EEST, Ben Boeckel wrote:
> > On Sat, May 04, 2024 at 03:21:11 +0300, Jarkko Sakkinen wrote:
> > > I have no idea for what the key created with this is even used, which
> > > makes this impossible to review.
> >
> > Additionally, there is nothing in Documentation/ for how userspace might
> > use or create them. This includes things like their description format
> > and describing available options.
>
> The whole user story is plain out broken. Documenting a feature that has
> no provable use case won't fix that part.
>
> So it is better to start with the cover letter. With the *existing*
> knowledge of the *real* issue I don't think we need this tbh.

As for code I'd suggest the "Describe your changes" part from 

  https://www.kernel.org/doc/html/latest/process/submitting-patches.html

and most essentially how to split them properly.

My best bet could something along the lines that perhaps there is some
issue to be sorted out but I don't honestly believe that this will ever
be a solution for any possible problem that exist in this planet.

BR, Jarkko