linux-kernel - Re: [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation (fbfam)

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Message-ID: <202009120053.9FB7F2A7@keescook>
Date:   Sat, 12 Sep 2020 00:55:03 -0700
From:   Kees Cook <keescook@...omium.org>
To:     John Wood <john.wood@....com>
Cc:     Jann Horn <jannh@...gle.com>, Matthew Wilcox <willy@...radead.org>,
        Jonathan Corbet <corbet@....net>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: Re: [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation
 (fbfam)

On Fri, Sep 11, 2020 at 04:48:06PM +0200, John Wood wrote:
> In other words, a late reply to this serie comments is not a lack of
> interest. Moreover, I think it would be better that I try to understand and
> to implement your ideas before anything else.

Understood! :)

> My original patch serie is composed of 9 patches, so the 3 lasts are lost.
> Kees: Have you removed them for some reason? Can you send them for review?
> 
> security/fbfam: Add two new prctls to enable and disable the fbfam feature
> https://github.com/johwood/linux/commit/8a36399847213e7eb7b45b853568a53666bd0083
> 
> Documentation/security: Add documentation for the fbfam feature
> https://github.com/johwood/linux/commit/fb46804541f5c0915f3f48acefbe6dc998815609
> 
> MAINTAINERS: Add a new entry for the fbfam feature
> https://github.com/johwood/linux/commit/4303bc8935334136c6ef47b5e50b87cd2c472c1f

Oh, hm, I'm not sure where they went. I think they were missing from my
inbox when I saved your series from email. An oversight on my part;
apologies!

> Is there a problem if I ask for some guidance (replying to this thread)
> during the process to do my second patch series?

Please feel free! I'm happy to help. :)

> My goal is to learn as much as possible doing something useful for the
> linux kernel.

Sounds good; thanks!

-- 
Kees Cook