linux-kernel - Re: [PATCH] tpm: factor out the user space mm from tpm_vtpm_set

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Message-ID: <8f15feb5-7c6e-5a16-d9b4-008b7b45b01a@linux.ibm.com>
Date:   Wed, 31 May 2023 11:20:30 -0400
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Jarkko Sakkinen <jarkko@...nel.org>,
        linux-integrity@...r.kernel.org
Cc:     Jason Gunthorpe <jgg@...dia.com>,
        Alejandro Cabrera <alejandro.cabreraaldaya@...i.fi>,
        Jarkko Sakkinen <jarkko.sakkinen@...i.fi>,
        stable@...r.kernel.org, Stefan Berger <stefanb@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tpm: factor out the user space mm from
 tpm_vtpm_set_locality()



On 5/30/23 16:50, Jarkko Sakkinen wrote:
> From: Jarkko Sakkinen <jarkko.sakkinen@...i.fi>
> 
> vtpm_proxy_fops_set_locality() causes kernel buffers to be passed to
> copy_from_user() and copy_to_user().

And what is the problem with that? Is it not working?
> 
> Factor out the crippled code away with help of an internal API for
> managing struct proxy_dev instances.

What is crippled code?

    Stefan