iproute causes container to not start anymore after upgrading guest OS to Centos-7.5

>Description of problem:
iproute causes container to not start anymore after upgrading guest OS to Centos-7.5

>How reproducible:

upgrade to iproute-4.11.0-14.el7 and restart container

>Steps to Reproduce:
1. iproute-3.10.0-87.el7 to iproute-4.11.0-14.el7
2. restart container
3. see it hanging, enter container and see "ip" command hanging

>Actual results:

hanging

>Expected results:

container bringing up network and starting

>Host OS:

OpenVZ release 7.0.7 (336)

>Guest OS:

Centos 7.4 -> 7.5

>Additional info (see https://openvz.org/Reporting_OpenVZ_problem):

Downgrading only iproute to iproute-3.10.0-87.el7 makes it work again.