linux-hardening - Re: [PATCH v6 0/6] mm/memfd: introduce MFD_NOEXEC_SEAL and MFD

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Message-ID: <202212081255.22D92C5@keescook>
Date:   Thu, 8 Dec 2022 12:55:55 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Jeff Xu <jeffxu@...gle.com>
Cc:     jeffxu@...omium.org, skhan@...uxfoundation.org,
        akpm@...ux-foundation.org, dmitry.torokhov@...il.com,
        dverkamp@...omium.org, hughd@...gle.com, jorgelo@...omium.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-mm@...ck.org, jannh@...gle.com,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH v6 0/6] mm/memfd: introduce MFD_NOEXEC_SEAL and MFD_EXEC

On Thu, Dec 08, 2022 at 10:33:19AM -0800, Jeff Xu wrote:
> On Thu, Dec 8, 2022 at 8:13 AM Kees Cook <keescook@...omium.org> wrote:
> >
> > On Wed, Dec 07, 2022 at 03:49:33PM +0000, jeffxu@...omium.org wrote:
> > > This is V6 version of patch: see [4] [5] [6] [7] for previous versions.
> >
> > When sending a new version, can you include an overview of what changed
> > between this version and the prior version? This helps reviewers who are
> > following along, so it's easier to focus our attention on the
> > differences. Also, it's helpful to version the links:
> >
> > > [4] https://lwn.net/Articles/890096/
> > > [5] https://lore.kernel.org/lkml/20220805222126.142525-1-jeffxu@google.com/
> > > [6] https://lore.kernel.org/lkml/20221202013404.163143-1-jeffxu@google.com/
> > > [7] https://lore.kernel.org/lkml/20221206152358.1966099-1-jeffxu@google.com/
> >
> > e.g.:
> >
> > v6:
> > - moved foo to bar
> > - improve comments for baz
> > v5: https://lore.kernel.org/lkml/20221206152358.1966099-1-jeffxu@google.com/
> > v3: https://lore.kernel.org/lkml/20221202013404.163143-1-jeffxu@google.com/
> > v2: ...etc
> >
> Will do!
> Much appreciated for helping me  through the process of my first patch
> in the kernel.

Happy to help! I'm excited to see this gap in memfd security closed. :)

-- 
Kees Cook