Re: [Qemu-devel] [PATCH 0/1] Bug: Sandbox: libvirt breakdowns qemu guest

[Eduardo Otubo]

On 07/05/2018 - 11:29:57, Christian Borntraeger wrote:
> On 05/07/2018 05:32 AM, Yi Min Zhao wrote:
> > 1. Problem Description
> > ======================
> > If QEMU is built without seccomp support, 'elevatorprivileges' remains 
> > compiled.
> > This option of sandbox is treated as an indication for seccomp blacklist 
> > support
> > in libvirt. This behavior is introduced by the libvirt commits 31ca6a5 and
> > 3527f9d. It would make libvirt build wrong QEMU cmdline, and then the guest
> > startup would fail.
> 
> Adding libvirt list.
> 
> This would still fail with older QEMUs, so the question is if we should also 
> OR instead
> change something in libvirt.

Perhaps I'm missing something here, but libvirt can differentiate between
different versions of QEMU, therefore not calling it with wrong or outdated
arguments.

> 
> > 
> > 2. Libvirt Log
> > ==============
> > qemu-system-s390x: -sandbox 
> > on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
> > resourcecontrol=deny: seccomp support is disabled
> > 
> > 3. Fixup
> > ========
> > Wrap the options except 'enable' for qemu_sandbox_opts by CONFIG_SECCOMP.
> > 
> > Yi Min Zhao (1):
> >   sandbox: avoid to compile options if CONFIG_SECCOMP undefined
> > 
> >  vl.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> 

-- 
Eduardo Otubo