passt/contrib/selinux/passt.te

# SPDX-License-Identifier: GPL-2.0-or-later
#
# PASST - Plug A Simple Socket Transport
#  for qemu/UNIX domain socket mode
#
# contrib/selinux/passt.te - SELinux profile: Type Enforcement for passt
#
# Copyright (c) 2022 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>

policy_module(passt, 0.1)

require {
	type unconfined_t;
	role unconfined_r;
	class process transition;

	type bin_t;
	type user_home_dir_t;
	type fs_t;
	type tmp_t;
	type user_tmp_t;
	type user_home_t;
	type tmpfs_t;
	type root_t;

	# Workaround: passt --vhost-user needs to map guest memory, but
	# libvirt doesn't maintain its own policy, which makes updates
	# particularly complicated. To avoid breakage in the short term,
	# deal with it in passt's own policy.
	type svirt_image_t;
	type svirt_tmpfs_t;
	type svirt_t;
	type null_device_t;

	class file { ioctl getattr setattr create read write unlink open relabelto execute execute_no_trans map };
	class dir { search write add_name remove_name mounton };
	class chr_file { append read write open getattr ioctl };
	class filesystem { getattr mount unmount };

	type console_device_t;
	type user_devpts_t;
	type devlog_t;
	type syslogd_t;
	type var_run_t;
	class unix_dgram_socket { create connect sendto };

	type net_conf_t;
	type proc_net_t;
	type node_t;
	class tcp_socket { create accept listen name_bind name_connect getattr ioctl };
	class udp_socket { create accept listen };
	class icmp_socket { bind create name_bind node_bind setopt read write };
	class sock_file { create unlink write };

	attribute port_type;
	type port_t;
	type http_port_t;

	class netlink_route_socket { bind create nlmsg_read };
	type sysctl_net_t;

	class capability { sys_tty_config setuid setgid };
	class cap_userns { setpcap sys_admin sys_ptrace };
	class user_namespace create;
}

type passt_t;
domain_type(passt_t);
type passt_exec_t;
files_type(passt_exec_t);
type passt_log_t;
logging_log_file(passt_log_t);
type passt_etc_t;
files_config_file(passt_etc_t);

role unconfined_r types passt_t;

allow passt_t passt_exec_t : file { ioctl read getattr lock execute execute_no_trans entrypoint open } ;
type_transition unconfined_t passt_exec_t : process passt_t;
allow unconfined_t passt_t : process transition ;

init_daemon_domain(passt_t, passt_exec_t)
term_use_all_inherited_terms(passt_t)

allow passt_t bin_t:file { execute execute_no_trans map };
allow passt_t user_home_dir_t:dir { search add_name write };
allow passt_t user_home_dir_t:file { create open write };
allow passt_t root_t:dir mounton;
allow passt_t tmp_t:dir { add_name mounton remove_name write };
allow passt_t tmpfs_t:filesystem mount;
allow passt_t fs_t:filesystem unmount;
allow passt_t user_home_t:dir search;
allow passt_t user_tmp_t:fifo_file append;
allow passt_t user_tmp_t:file map;

manage_files_pattern(passt_t, user_tmp_t, user_tmp_t)
files_pid_filetrans(passt_t, user_tmp_t, file)

allow passt_t console_device_t:chr_file { open write getattr ioctl };
allow passt_t user_devpts_t:chr_file { getattr read write ioctl };
logging_send_syslog_msg(passt_t)
allow syslogd_t self:cap_userns sys_ptrace;

allow passt_t self:process setcap;
allow passt_t self:capability { sys_tty_config setpcap net_bind_service setuid setgid};
allow passt_t self:cap_userns { setpcap sys_admin sys_ptrace };
allow passt_t self:user_namespace create;

auth_read_passwd(passt_t)

allow passt_t proc_net_t:file read;
allow passt_t net_conf_t:file { open read };
allow passt_t net_conf_t:lnk_file read;
allow passt_t tmp_t:sock_file { create unlink write };
allow passt_t self:netlink_route_socket { bind create nlmsg_read read write setopt };
kernel_search_network_sysctl(passt_t)
allow passt_t sysctl_net_t:dir search;
allow passt_t sysctl_net_t:file { open read };

corenet_tcp_bind_all_nodes(passt_t)
corenet_udp_bind_all_nodes(passt_t)

corenet_tcp_bind_all_ports(passt_t)
corenet_udp_bind_all_ports(passt_t)

corenet_tcp_connect_all_ports(passt_t)

corenet_tcp_sendrecv_all_ports(passt_t)
corenet_udp_sendrecv_all_ports(passt_t)

allow passt_t node_t:icmp_socket { name_bind node_bind };
allow passt_t port_t:icmp_socket name_bind;

allow passt_t self:tcp_socket { create getopt setopt connect bind listen accept shutdown read write getattr ioctl };
allow passt_t self:udp_socket { create getopt setopt connect bind read write };
allow passt_t self:icmp_socket { bind create setopt read write };

allow passt_t user_tmp_t:dir { add_name write };
allow passt_t user_tmp_t:file { create open };
allow passt_t user_tmp_t:sock_file { create read write unlink };
allow passt_t unconfined_t:unix_stream_socket { read write };

# Workaround: passt --vhost-user needs to map guest memory, but
# libvirt doesn't maintain its own policy, which makes updates
# particularly complicated. To avoid breakage in the short term,
# deal with it in passt's own policy.
allow passt_t svirt_image_t:file { read write map };
allow passt_t svirt_tmpfs_t:file { read write map };
allow passt_t null_device_t:chr_file map;