selinux-policy/refpolicy/policy/modules/kernel/domain.te

policy_module(domain,1.1.0)

########################################
#
# Declarations
#

# Mark process types as domains
attribute domain;

# Transitions only allowed from domains to other domains
neverallow domain ~domain:process { transition dyntransition };

# Domains that are unconfined
attribute unconfined_domain_type;

# Domains that can set their current context
# (perform dynamic transitions)
attribute set_curr_context;

# enabling setcurrent breaks process tranquility.  If you do not
# know what this means or do not understand the implications of a
# dynamic transition, you should not be using it!!!
neverallow { domain -set_curr_context } self:process setcurrent;

# entrypoint executables
attribute entry_type;

# widely-inheritable file descriptors
attribute privfd;

#
# constraint related attributes
#

# [1] types that can change SELinux identity on transition
attribute can_change_process_identity;

# [2] types that can change SELinux role on transition
attribute can_change_process_role;

# [3] types that can change the SELinux identity on a filesystem
# object or a socket object on a create or relabel
attribute can_change_object_identity;

# [3] types that can change to system_u:system_r
attribute can_system_change;

# [4] types that have attribute 1 can change the SELinux
# identity only if the target domain has this attribute.
# Types that have attribute 2 can change the SELinux role
# only if the target domain has this attribute.
attribute process_user_target;

# For cron jobs
# [5] types used for cron daemons
attribute cron_source_domain;
# [6] types used for cron jobs
attribute cron_job_domain;

# [7] types that are unconditionally exempt from
# SELinux identity and role change constraints
attribute process_uncond_exempt;	# add userhelperdomain to this one

neverallow { domain unlabeled_t } ~{ domain unlabeled_t }:process *;
neverallow ~{ domain unlabeled_t } *:process *;