[PATCH] Forbid invocation of kexec_load() outside initial PID namespace

Daniel P. Berrange berrange at redhat.com
Fri Aug 3 12:52:10 UTC 2012

On Fri, Aug 03, 2012 at 05:45:40AM -0700, Eric W. Biederman wrote:
> The solution is to use user namespaces and to only test ns_capable on the magic reboot path.
> For the 3.7 timeframe that should be a realistic solution.

Hmm, that would imply that if LXC wants to allow reboot()/CAP_SYS_BOOT
they will be forced to use CLONE_NEWUSER. I was rather looking for a way
to allow the container to keep CAP_SYS_BOOT, without also mandating use
of user namespaces.

|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

More information about the Containers mailing list