From: Andrew Morton <akpm@linux-foundation.org>
To: Lokesh Gidra <lokeshgidra@google.com>
Cc: Kees Cook <keescook@chromium.org>,
Jonathan Corbet <corbet@lwn.net>, Peter Xu <peterx@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Stephen Smalley <stephen.smalley.work@gmail.com>,
Eric Biggers <ebiggers@kernel.org>,
Daniel Colascione <dancol@dancol.org>,
"Joel Fernandes (Google)" <joel@joelfernandes.org>,
Linux FS Devel <linux-fsdevel@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-doc@vger.kernel.org, Kalesh Singh <kaleshsingh@google.com>,
Calin Juravle <calin@google.com>,
Suren Baghdasaryan <surenb@google.com>,
Jeffrey Vander Stoep <jeffv@google.com>,
"Cc: Android Kernel" <kernel-team@android.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>, Shaohua Li <shli@fb.com>,
Jerome Glisse <jglisse@redhat.com>,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Mel Gorman <mgorman@techsingularity.net>,
Nitin Gupta <nigupta@nvidia.com>,
Vlastimil Babka <vbabka@suse.cz>,
Iurii Zaikin <yzaikin@google.com>,
Luis Chamberlain <mcgrof@kernel.org>,
linux-mm@kvack.kernel.org, Daniel Colascione <dancol@google.com>,
"open list:MEMORY MANAGEMENT" <linux-mm@kvack.org>
Subject: Re: [PATCH v6 1/2] Add UFFD_USER_MODE_ONLY
Date: Mon, 23 Nov 2020 12:11:08 -0800 [thread overview]
Message-ID: <20201123121108.24d178769cfc9500c7c51317@linux-foundation.org> (raw)
In-Reply-To: <CA+EESO7xnnJAsPneuy1dNj6F47gViGiL-z8rajY5EoGdFWs+-A@mail.gmail.com>
On Mon, 23 Nov 2020 11:17:43 -0800 Lokesh Gidra <lokeshgidra@google.com> wrote:
> > > A future patch adds a knob allowing administrators to give some
> > > processes the ability to create userfaultfd file objects only if they
> > > pass UFFD_USER_MODE_ONLY, reducing the likelihood that these processes
> > > will exploit userfaultfd's ability to delay kernel page faults to open
> > > timing windows for future exploits.
> >
> > Can we assume that an update to the userfaultfd(2) manpage is in the
> > works?
> >
> Yes, I'm working on it. Can the kernel version which will have these
> patches be known now so that I can mention it in the manpage?
5.11, if all proceeds smoothly.
next prev parent reply other threads:[~2020-11-23 20:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201120030411.2690816-1-lokeshgidra@google.com>
2020-11-20 3:08 ` [PATCH v6 0/2] Control over userfaultfd kernel-fault handling Lokesh Gidra
[not found] ` <20201120030411.2690816-2-lokeshgidra@google.com>
2020-11-20 3:09 ` [PATCH v6 1/2] Add UFFD_USER_MODE_ONLY Lokesh Gidra
[not found] ` <20201120153337.431dc36c1975507bb1e44596@linux-foundation.org>
2020-11-23 19:17 ` Lokesh Gidra
2020-11-23 20:11 ` Andrew Morton [this message]
[not found] ` <20201120030411.2690816-3-lokeshgidra@google.com>
2020-11-20 3:10 ` [PATCH v6 2/2] Add user-mode only option to unprivileged_userfaultfd sysctl knob Lokesh Gidra
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