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Description of problem:
Secure_mode boolean should prevent confined users from transitioning to sysadm domain or switch to the root user (switch to privileged role). 

Created a brand new RHEL9 beta install.

Created a staff_u user pimpampet:

id -Z
staff_u:staff_r:staff_t:s0-s0:c0.c1023

getsebool secure_mode
secure_mode --> on

rpm -q selinux-policy
selinux-policy-34.1.16-1.el9_b.noarch

newrole -r unconfined_r
Password: 
[pimpampet@rhel9-beta ~]$ id -Z
staff_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

(RHBA-2021:4420 will install selinux-policy 3.14.3-80; more recent than the one currently available in RHEL 9.0 beta)


Steps to Reproduce:
1. Enable secure_mode boolean
2. Login as SELinux user staff_u
3. Switch with newrole to unconfined_r

Actual results:
SELinux user staff can switch to unconfined domain

Expected results:
SELinux user staff cannot switch to unconfined domain

Additional info:
Proposed fix: remove unconfined_t from unpriv_user_domain.

*** This bug has been marked as a duplicate of bug 2021529 ***