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SubjectRe: [PATCH v2 1/1] userfaultfd/sysctl: add vm.unprivileged_userfaultfd
On Tue, Mar 19, 2019 at 11:02 AM Andrew Morton
<akpm@linux-foundation.org> wrote:
>
> On Tue, 19 Mar 2019 11:07:22 +0800 Peter Xu <peterx@redhat.com> wrote:
>
> > Add a global sysctl knob "vm.unprivileged_userfaultfd" to control
> > whether userfaultfd is allowed by unprivileged users. When this is
> > set to zero, only privileged users (root user, or users with the
> > CAP_SYS_PTRACE capability) will be able to use the userfaultfd
> > syscalls.
>
> Please send along a full description of why you believe Linux needs
> this feature, for me to add to the changelog. What is the benefit to
> our users? How will it be used?
>
> etcetera. As it was presented I'm seeing no justification for adding
> the patch!

Was there a v3 of this patch? I'd still really like to have this knob added. :)

Thanks!

--
Kees Cook

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