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Description of problem:

When a user is confined to sysadm_u and sudo'es, he still cannot execute administrative postfix commands such as the ones below:

-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
# id -Z
sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023

# /sbin/postsuper
-bash: /sbin/postsuper: Permission denied

# /usr/bin/newaliases
postalias: fatal: open database /etc/aliases.db: Permission denied
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

For `postsuper`, it's due to not having a rule to execute "postfix_master_exec_t" file.

For `newaliases`, it's due to not having a rule to be able to create the file in `/etc` when file doesn't exist.


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

selinux-policy-3.14.3-67.el8_4.1.noarch


How reproducible:

Always, see above.

Additional info:

This is problematic when root has been disabled. Since it's not possible to transition to "unconfined_r" role, no sysadm_u user can execute such commands.

rhel8# rpm -q selinux-policy
selinux-policy-3.14.3-85.el8.noarch
rhel8# /sbin/postsuper
rhel8# touch /etc/aliases
rhel8# /usr/bin/newaliases
rhel8#

*** This bug has been marked as a duplicate of bug 1965251 ***

Hi Zdenek,

I don't understand why you closed this as a dup of some unrelated BZ (the other BZ is on sosreport).
Do you plan to fix this in that BZ instead?

Just FYI the solution here is to allow user_mail_t to manage etc_aliases_t:

-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
policy_module(user_mail_allow_creating_etc_aliases, 1.0)

gen_require(`
	type user_mail_t;
	type etc_aliases_t;
')

manage_files_pattern(user_mail_t, etc_aliases_t, etc_aliases_t)
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------