linux-kernel - Re: [PATCH V31 25/25] debugfs: Disable open() when kernel is locked down

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Message-ID: <CACdnJuuZmPymMMFxGgUy8Wm-msWS+MztpXE-HNPzX96WRUKbqQ@mail.gmail.com>
Date:   Tue, 26 Mar 2019 12:21:56 -0700
From:   Matthew Garrett <mjg59@...gle.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     James Morris <jmorris@...ei.org>,
        LSM List <linux-security-module@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        David Howells <dhowells@...hat.com>,
        Linux API <linux-api@...r.kernel.org>,
        Greg KH <gregkh@...uxfoundation.org>
Subject: Re: [PATCH V31 25/25] debugfs: Disable open() when kernel is locked down

On Tue, Mar 26, 2019 at 12:20 PM Andy Lutomirski <luto@...nel.org> wrote:
> Ugh.  Some of those files are very useful.  Could this perhaps still
> allow O_RDONLY if we're in INTEGRITY mode?

The previous implementation did, but Greg wanted it to go away entirely.