[apparmor] Apparmor with initramfs mode

Francois Bussery Francois.Bussery at pace.com
Tue Jul 1 16:32:32 UTC 2014

The Pb is in my mind not an apparmor issue but an initramfs issue.
Note that inittmpfs, don t have the MS_NOUSER flag. Also it exists some patch for initramfs that disable this flag... I have to evaluate them.. But a quick test with that kind of patch seems to solve the pb...

Envoyé à partir de mon Windows Phone
De : John Johansen<mailto:john.johansen at canonical.com>
Envoyé : ‎01/‎07/‎2014 17:33
À : Francois Bussery<mailto:Francois.Bussery at pace.com>; apparmor at lists.ubuntu.com<mailto:apparmor at lists.ubuntu.com>
Objet : Re: [apparmor] Apparmor with initramfs mode

On 07/01/2014 05:23 AM, Francois Bussery wrote:
> Thanks a lot for this reply.
> In fact, I can confirm that apparmor works fine when booting from
> initramfs. I have no problem with profiles I write manually.
> All the rules are working fine for all mount points except the rootfs.
> (Ex: /sys, /proc, /mnt/xxx,Š)
> Unfortunately, for the files inside the initramfs, they¹re not catched by
> apparmor. It seems that the problem is that they¹re not considered as
> ³mediated filesystem²
> The pb seems to be related to the flag MS_NOUSER that is set in initramfs.
Ah yes correcy, currently apparmor won't mediate the initramfs it self.

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