linux-kernel - Re: [PATCH 07/27] kexec_file: Disable at runtime if securelevel has been set

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Date:   Mon, 30 Oct 2017 09:00:29 +0000
From:   David Howells <dhowells@...hat.com>
To:     Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc:     dhowells@...hat.com, joeyli <jlee@...e.com>,
        linux-security-module@...r.kernel.org, gnomes@...rguk.ukuu.org.uk,
        linux-efi@...r.kernel.org, matthew.garrett@...ula.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        jforbes@...hat.com
Subject: Re: [PATCH 07/27] kexec_file: Disable at runtime if securelevel has been set

Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:

> Yes, that works.  Thanks!  Remember is_ima_appraise_enabled() is
> dependent on the "ima: require secure_boot rules in lockdown mode"
> patch - http://kernsec.org/pipermail/linux-security-module-archive/201
> 7-October/003910.html.

What happens if the file in question is being accessed from a filesystem that
doesn't have xattrs and doesn't provide support for appraisal?  Is it rejected
outright or just permitted?

David