Re: [PATCH v6 0/1] ns: introduce binfmt_misc namespace

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On Thu, Nov 1, 2018 at 3:59 AM James Bottomley
<James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
> On Tue, 2018-10-16 at 11:52 +0200, Laurent Vivier wrote:
> > Hi,
> >
> > Any comment on this last version?
> >
> > Any chance to be merged?
>
> I've got a use case for this:  I went to one of the Graphene talks in
> Edinburgh and it struck me that we seem to keep reinventing the type of
> sandboxing that qemu-user already does.  However if you want to do an
> x86 on x86 sandbox, you can't currently use the binfmt_misc mechanism
> because that has you running *every* binary on the system emulated.
> Doing it per user namespace fixes this problem and allows us to at
> least cut down on all the pointless duplication.

Waaaaaait. What? qemu-user does not do "sandboxing". qemu-user makes
your code slower and *LESS* secure. As far as I know, qemu-user is
only intended for purposes like development and testing.
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