bus_driver_handle_message: reject ActivationFailure if unprivileged
Specifically, this will allow ActivationFailure messages from our
own uid or from root, but reject them otherwise, even if the bus
configuration for who can own org.freedesktop.systemd1 is entirely
wrong due to something like CVE-2014-8148.
Signed-off-by: Simon McVittie <smcv@debian.org> Reviewed-by: Colin Walters <walters@verbum.org>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=98157