From: John Wood <john.wood@gmx.com>
To: Jann Horn <jannh@google.com>
Cc: Kees Cook <keescook@chromium.org>, John Wood <john.wood@gmx.com>,
Kernel Hardening <kernel-hardening@lists.openwall.com>,
Matthew Wilcox <willy@infradead.org>,
Jonathan Corbet <corbet@lwn.net>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Luis Chamberlain <mcgrof@kernel.org>,
Iurii Zaikin <yzaikin@google.com>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
linux-doc@vger.kernel.org,
kernel list <linux-kernel@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-security-module <linux-security-module@vger.kernel.org>
Subject: Re: [RFC PATCH 1/6] security/fbfam: Add a Kconfig to enable the fbfam feature
Date: Thu, 17 Sep 2020 19:32:09 +0200 [thread overview]
Message-ID: <20200917173209.GA3637@ubuntu> (raw)
In-Reply-To: <CAG48ez1V=oVczCCSuRaWX=bbN2cOi0Y9q48=e-Fuhg7mwMOi0A@mail.gmail.com>
On Thu, Sep 10, 2020 at 11:21:58PM +0200, Jann Horn wrote:
> On Thu, Sep 10, 2020 at 10:21 PM Kees Cook <keescook@chromium.org> wrote:
> > From: John Wood <john.wood@gmx.com>
> >
> > Add a menu entry under "Security options" to enable the "Fork brute
> > force attack mitigation" feature.
> [...]
> > +config FBFAM
>
> Please give this a more descriptive name than FBFAM. Some name where,
> if a random kernel developer sees an "#ifdef" with that name in some
> random piece of kernel code, they immediately have a rough idea for
> what kind of feature this is.
>
> Perhaps something like THROTTLE_FORK_CRASHES. Or something else that
> is equally descriptive.
Ok, understood. This will be fixed for the next version. Thanks.
> > + bool "Fork brute force attack mitigation"
> > + default n
>
> "default n" is superfluous and should AFAIK be omitted.
Ok. I will remove it. Thanks.
> > + help
> > + This is a user defense that detects any fork brute force attack
> > + based on the application's crashing rate. When this measure is
> > + triggered the fork system call is blocked.
>
> This help text claims that the mitigation will block fork(), but patch
> 6/6 actually kills the process hierarchy.
Sorry, it's a mistake. It was the first idea but finally the implementation
changed and this description not was modified. Apologies. It will be fixed
for the next version.
Thanks,
John Wood
next prev parent reply other threads:[~2020-09-17 17:43 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 20:21 [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation (fbfam) Kees Cook
2020-09-10 20:21 ` [RFC PATCH 1/6] security/fbfam: Add a Kconfig to enable the fbfam feature Kees Cook
2020-09-10 21:21 ` Jann Horn
2020-09-10 21:21 ` Jann Horn
2020-09-17 17:32 ` John Wood [this message]
2020-09-10 23:18 ` Kees Cook
2020-09-17 18:40 ` John Wood
2020-09-17 22:05 ` Kees Cook
2020-09-18 14:50 ` John Wood
2020-09-10 20:21 ` [RFC PATCH 2/6] security/fbfam: Add the api to manage statistics Kees Cook
2020-09-10 23:23 ` Kees Cook
2020-09-10 20:21 ` [RFC PATCH 3/6] security/fbfam: Use " Kees Cook
2020-09-10 20:27 ` Jann Horn
2020-09-10 20:27 ` Jann Horn
2020-09-10 23:33 ` Kees Cook
2020-09-29 23:47 ` Steven Rostedt
2020-09-29 23:49 ` Steven Rostedt
2020-10-03 9:52 ` John Wood
2020-09-10 20:21 ` [RFC PATCH 4/6] security/fbfam: Add a new sysctl to control the crashing rate threshold Kees Cook
2020-09-10 23:14 ` Kees Cook
2020-09-13 14:33 ` John Wood
2020-09-10 20:21 ` [RFC PATCH 5/6] security/fbfam: Detect a fork brute force attack Kees Cook
2020-09-10 21:10 ` Jann Horn
2020-09-10 21:10 ` Jann Horn
2020-09-13 17:54 ` John Wood
2020-09-14 19:42 ` Jann Horn
2020-09-14 19:42 ` Jann Horn
2020-09-15 18:44 ` John Wood
2020-09-10 23:49 ` Kees Cook
2020-09-11 0:01 ` Jann Horn
2020-09-11 0:01 ` Jann Horn
2020-09-13 16:56 ` John Wood
2020-09-14 19:39 ` Jann Horn
2020-09-14 19:39 ` Jann Horn
2020-09-15 17:36 ` John Wood
2020-09-12 0:47 ` kernel test robot
2020-09-10 20:21 ` [RFC PATCH 6/6] security/fbfam: Mitigate " Kees Cook
2020-09-10 20:55 ` Jann Horn
2020-09-10 20:55 ` Jann Horn
2020-09-10 23:56 ` Kees Cook
2020-09-11 0:20 ` Jann Horn
2020-09-11 0:20 ` Jann Horn
2020-09-18 16:02 ` John Wood
2020-09-18 21:35 ` Kees Cook
2020-09-19 8:01 ` John Wood
2020-09-10 20:39 ` [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation (fbfam) Jann Horn
2020-09-10 20:39 ` Jann Horn
2020-09-10 23:58 ` Kees Cook
2020-09-11 14:48 ` John Wood
2020-09-12 7:55 ` Kees Cook
2020-09-12 12:24 ` John Wood
2020-09-12 0:03 ` James Morris
2020-09-12 7:56 ` Kees Cook
2020-09-12 9:36 ` John Wood
2020-09-12 14:47 ` Mel Gorman
2020-09-12 20:48 ` Ondrej Mosnacek
2020-09-12 20:48 ` Ondrej Mosnacek
2020-09-13 7:24 ` John Wood
2020-09-13 7:24 ` John Wood
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