Description of problem:

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

3.9.7-1

How reproducible:

Always

Steps to Reproduce:
1. Create a pod with a secret, configmap, downwardAPI and projected volume
2. Create volume mounts for each of those volumes that make use of the subPath feature

Actual results:

The pod will not start with errors like 

failed to prepare subPath for volumeMount "config" of container "mumble": subpath "/var/lib/kubelet/pods/66fa673c-266d-11e8-8ebf-00155d00a406/volumes/kubernetes.io~configmap/config/..2018_03_13_03_19_55.572152209/mumble.ini" not within volume path "/var/lib/kubelet/pods/66fa673c-266d-11e8-8ebf-00155d00a406/volumes/kubernetes.io~configmap/config"


Expected results:

Pod starts properly and volume mounts work


Regression introduced as part of the fix for https://bugzilla.redhat.com/show_bug.cgi?id=1519365

Upstream issue: https://github.com/kubernetes/kubernetes/issues/61076#issuecomment-372554309

The security fix was backported all the way to 3.3, which means this regression was as well.