% oc get clusterversion
NAME      VERSION                              AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.11.0-0.nightly-2022-06-15-222801   True        False         8h      Cluster version is 4.11.0-0.nightly-2022-06-15-222801

% oc new-app rails-postgresql-example
--> Deploying template "openshift/rails-postgresql-example" to project app4

% oc get pods
NAME                               READY   STATUS      RESTARTS   AGE
postgresql-1-d4bwf                 1/1     Running     0          32s
postgresql-1-deploy                0/1     Completed   0          36s
rails-postgresql-example-1-build   1/1     Running     0          38s

% oc rsh postgresql-1-d4bwf
sh-4.4$ unshare
unshare: unshare failed: Function not implemented
sh-4.4$ exit
exit
command terminated with exit code 1

% oc describe pod postgresql-1-d4bwf | grep -e seccomp
              seccomp.security.alpha.kubernetes.io/pod: runtime/default

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Important: OpenShift Container Platform 4.11.0 bug fix and security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2022:5069