linux-kernel - Re: [PATCH v4] certs: Add EFI_CERT_X509

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Date:   Wed, 27 Jan 2021 11:46:11 +0000
From:   David Howells <dhowells@...hat.com>
To:     Jarkko Sakkinen <jarkko@...nel.org>
Cc:     dhowells@...hat.com, Eric Snowberg <eric.snowberg@...cle.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        dwmw2@...radead.org, herbert@...dor.apana.org.au,
        davem@...emloft.net, jmorris@...ei.org, serge@...lyn.com,
        nayna@...ux.ibm.com, Mimi Zohar <zohar@...ux.ibm.com>,
        erichte@...ux.ibm.com, mpe@...erman.id.au,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        James.Bottomley@...senpartnership.com
Subject: Re: [PATCH v4] certs: Add EFI_CERT_X509_GUID support for dbx entries

Jarkko Sakkinen <jarkko@...nel.org> wrote:

> > I suppose a user space tool could be created. But wouldn’t what is
> > currently done in the kernel in this area need to be removed?
> 
> Right. I don't think this was a great idea in the first place to
> do to the kernel but since it exists, I guess the patch does make
> sense.

This information needs to be loaded from the UEFI tables before the system
starts loading any kernel modules or running any programs (if we do
verification of such, which I think IMA can do).

David