linux-kernel - Re: [PATCH] tpm: Add module parameter for hwrng quality.

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Date:   Thu, 21 Jun 2018 19:21:01 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jason Gunthorpe <jgg@...pe.ca>
Cc:     Louis Collard <louiscollard@...omium.org>,
        linux-integrity@...r.kernel.org, Peter Huewe <peterhuewe@....de>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, apronin@...omium.org
Subject: Re: [PATCH] tpm: Add module parameter for hwrng quality.

On Mon, Jun 18, 2018 at 01:33:06PM -0600, Jason Gunthorpe wrote:
> > > +module_param(override_rng_quality, short, 0644);
> > 
> > Should this be 600 i.e. not to leak this information?
> 
> There is a real push these days against adding module parameters, and
> apparently, IMA can't function with TPM as a module.
> 
> Are you sure this shouldn't be done in some other way?

Maybe a sysfs file would be a better choice for this?

/Jarkko