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

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Subject: Re: [PATCH V31 25/25] debugfs: Disable open() when kernel is locked down
From: Matthew Garrett <mjg59@xxxxxxxxxx>
Date: Tue, 26 Mar 2019 12:21:56 -0700
Cc: James Morris <jmorris@xxxxxxxxx>, LSM List <linux-security-module@xxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, David Howells <dhowells@xxxxxxxxxx>, Linux API <linux-api@xxxxxxxxxxxxxxx>, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <CALCETrXDF2c2-gnOyNTnEn-uPAZp0AaSB_PB8e2y8jf7zo=Cyg@mail.gmail.com>
References: <20190326182742.16950-1-matthewgarrett@google.com> <20190326182742.16950-26-matthewgarrett@google.com> <CALCETrXDF2c2-gnOyNTnEn-uPAZp0AaSB_PB8e2y8jf7zo=Cyg@mail.gmail.com>

On Tue, Mar 26, 2019 at 12:20 PM Andy Lutomirski <luto@xxxxxxxxxx> 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.

References:
- [PATCH V31 00/25] Add support for kernel lockdown
  - From: Matthew Garrett
- [PATCH V31 25/25] debugfs: Disable open() when kernel is locked down
  - From: Matthew Garrett
- Re: [PATCH V31 25/25] debugfs: Disable open() when kernel is locked down
  - From: Andy Lutomirski

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