lkml.org 
[lkml]   [2019]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 0/3] userfaultfd: allow to forbid unprivileged users
From
Date
On 14/03/19 00:44, Andrea Arcangeli wrote:
> Then I thought we can add a tristate so an open of /dev/kvm would also
> allow the syscall to make things more user friendly because
> unprivileged containers ideally should have writable mounts done with
> nodev and no matter the privilege they shouldn't ever get an hold on
> the KVM driver (and those who do, like kubevirt, will then just work).

I wouldn't even bother with the KVM special case. Containers can use
seccomp if they want a fine-grained policy.

(Actually I wouldn't bother with the knob at all; the attack surface of
userfaultfd is infinitesimal compared to the BPF JIT...).

Paolo

\
 
 \ /
  Last update: 2019-03-14 11:59    [W:0.085 / U:1.952 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site