Description of problem:

machinectl fails to start f23 beta image: Failed to open /dev/loop-control

Version-Release number of selected component (if applicable):

[root@f23beta ~]# rpm -qf `which machinectl`
systemd-222-6.fc23.x86_64
[root@f23beta ~]# 

How reproducible:

always

Steps to Reproduce:

downloaded the f23 beta cloud image and saved it as f23.raw.xz, because of https://bugzilla.redhat.com/show_bug.cgi?id=1266775

[root@f23beta ~]# machinectl list-images
NAME TYPE RO  USAGE CREATED MODIFIED

0 images listed.
[root@f23beta ~]# machinectl import-raw /home/fedora/f23.raw.xz
Enqueued transfer job 1. Press C-c to continue download in background.
Importing '/home/fedora/f23.raw.xz', saving as 'f23'.
Imported 0%.
Imported 1%.
...
Imported 99%.
Imported 100%.
Operation completed successfully.
Exiting.
[root@f23beta ~]# machinectl list-images
NAME TYPE RO  USAGE  CREATED MODIFIED                   
f23  raw  no  647.1M n/a     Sun 2015-09-27 13:50:36 UTC

1 images listed.
[root@f23beta ~]# machinectl start f23
Job for systemd-nspawn failed because the control process exited with error code. See "systemctl status systemd-nspawn" and "journalctl -xe" for details.

Actual results:

Sep 27 17:35:08 f23beta.localdomain systemd[1]: Starting Container f23...
Sep 27 17:35:08 f23beta.localdomain systemd-nspawn[854]: Failed to open /dev/loop-control: Operation not permitted
Sep 27 17:35:08 f23beta.localdomain systemd[1]: systemd-nspawn: Main process exited, code=exited, status=1/FAILURE
Sep 27 17:35:08 f23beta.localdomain systemd[1]: Failed to start Container f23.
Sep 27 17:35:08 f23beta.localdomain systemd[1]: systemd-nspawn: Unit entered failed state.
Sep 27 17:35:08 f23beta.localdomain systemd[1]: systemd-nspawn: Failed with result 'exit-code'.


Expected results:

container should start

Additional info:

I set selinux to permissive, but that didn't help.