linux-kernel - Re: [PATCH 2/2] Add a new sysctl knob: unprivileged_userfaultfd_user_mode

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Message-ID: <20200520195134.GK26186@redhat.com>
Date:   Wed, 20 May 2020 15:51:34 -0400
From:   Andrea Arcangeli <aarcange@...hat.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Daniel Colascione <dancol@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Peter Xu <peterx@...hat.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Jerome Glisse <jglisse@...hat.com>, Shaohua Li <shli@...com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, timmurray@...gle.com,
        minchan@...gle.com, sspatil@...gle.com, lokeshgidra@...gle.com
Subject: Re: [PATCH 2/2] Add a new sysctl knob:
 unprivileged_userfaultfd_user_mode_only

On Wed, May 20, 2020 at 03:48:04PM -0400, Andrea Arcangeli wrote:
> The sysctl /proc/sys/kernel/unprivileged_bpf_disabled is already there

Oops I picked the wrong unprivileged_* :) of course I meant:
/proc/sys/vm/unprivileged_userfaultfd