Update netlink socket classes.

Define new netlink socket security classes introduced by kernel commit
223ae516404a7a65f09e79a1c0291521c233336e.

Note that this does not remove the long-since obsolete
netlink_firewall_socket and netlink_ip6_fw_socket classes
from refpolicy in case they are still needed for legacy
distribution policies.

Add the new socket classes to socket_class_set.
Update ubac and mls constraints for the new socket classes.
Add allow rules for a few specific known cases (netutils, iptables,
netlabel, ifconfig, udev) in core policy that require access.
Further refinement for the contrib tree will be needed.  Any allow
rule previously written on :netlink_socket may need to be rewritten or
duplicated for one of the more specific classes.  For now, we retain the
existing :netlink_socket rules for compatibility on older kernels.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

policy/constraints

@@ -150,6 +150,14 @@ exempted_ubac_constraint(netlink_kobject_uevent_socket, ubacsock)
 exempted_ubac_constraint(appletalk_socket, ubacsock)
 exempted_ubac_constraint(dccp_socket, ubacsock)
 exempted_ubac_constraint(tun_socket, ubacsock)
+exempted_ubac_constraint(netlink_iscsi_socket, ubacsock)
+exempted_ubac_constraint(netlink_fib_lookup_socket, ubacsock)
+exempted_ubac_constraint(netlink_connector_socket, ubacsock)
+exempted_ubac_constraint(netlink_netfilter_socket, ubacsock)
+exempted_ubac_constraint(netlink_generic_socket, ubacsock)
+exempted_ubac_constraint(netlink_scsitransport_socket, ubacsock)
+exempted_ubac_constraint(netlink_rdma_socket, ubacsock)
+exempted_ubac_constraint(netlink_crypto_socket, ubacsock)
 
 constrain socket_class_set { create relabelto relabelfrom } 
 (

policy/flask/access_vectors

@@ -852,6 +852,30 @@ class binder
 	transfer
 }
 
+class netlink_iscsi_socket
+inherits socket
+
+class netlink_fib_lookup_socket
+inherits socket
+
+class netlink_connector_socket
+inherits socket
+
+class netlink_netfilter_socket
+inherits socket
+
+class netlink_generic_socket
+inherits socket
+
+class netlink_scsitransport_socket
+inherits socket
+
+class netlink_rdma_socket
+inherits socket
+
+class netlink_crypto_socket
+inherits socket
+
 class x_pointer
 inherits x_device
 

policy/flask/security_classes

@@ -125,6 +125,16 @@ class tun_socket
 
 class binder
 
+# Updated netlink classes for more recent netlink protocols.
+class netlink_iscsi_socket
+class netlink_fib_lookup_socket
+class netlink_connector_socket
+class netlink_netfilter_socket
+class netlink_generic_socket
+class netlink_scsitransport_socket
+class netlink_rdma_socket
+class netlink_crypto_socket
+
 # Still More SE-X Windows stuff
 class x_pointer			# userspace
 class x_keyboard		# userspace

policy/mls

@@ -164,7 +164,7 @@ mlsconstrain filesystem { mount remount unmount relabelfrom quotamod }
 #
 
 # new socket labels must be dominated by the relabeling subjects clearance
-mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket } relabelto
+mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket netlink_crypto_socket } relabelto
 	( h1 dom h2 );
 
 # the socket "read+write" ops
@@ -180,7 +180,7 @@ mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_s
 
 
 # the socket "read" ops (note the check is dominance of the low level)
-mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket } { read getattr listen accept getopt recv_msg }
+mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket netlink_crypto_socket } { read getattr listen accept getopt recv_msg }
 	(( l1 dom l2 ) or
 	 (( t1 == mlsnetreadtoclr ) and ( h1 dom l2 )) or
 	 ( t1 == mlsnetread ));
@@ -191,7 +191,7 @@ mlsconstrain { netlink_route_socket netlink_firewall_socket netlink_tcpdiag_sock
 	 ( t1 == mlsnetread ));
 
 # the socket "write" ops
-mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket } { write setattr relabelfrom connect setopt shutdown }
+mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket netlink_crypto_socket } { write setattr relabelfrom connect setopt shutdown }
 	(( l1 eq l2 ) or 
 	 (( t1 == mlsnetwriteranged ) and ( l1 dom l2 ) and ( l1 domby h2 )) or
 	 (( t1 == mlsnetwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or

policy/modules/admin/netutils.te

@@ -38,6 +38,8 @@ dontaudit netutils_t self:capability { dac_override sys_tty_config };
 allow netutils_t self:process { setcap signal_perms };
 allow netutils_t self:netlink_route_socket create_netlink_socket_perms;
 allow netutils_t self:netlink_socket create_socket_perms;
+# For tcpdump.
+allow netutils_t self:netlink_netfilter_socket create_socket_perms;
 allow netutils_t self:packet_socket create_socket_perms;
 allow netutils_t self:udp_socket create_socket_perms;
 allow netutils_t self:tcp_socket create_stream_socket_perms;

policy/modules/system/iptables.te

@@ -35,6 +35,7 @@ dontaudit iptables_t self:capability sys_tty_config;
 allow iptables_t self:fifo_file rw_fifo_file_perms;
 allow iptables_t self:process { sigchld sigkill sigstop signull signal };
 allow iptables_t self:netlink_socket create_socket_perms;
+allow iptables_t self:netlink_netfilter_socket create_socket_perms;
 allow iptables_t self:rawip_socket create_socket_perms;
 
 manage_files_pattern(iptables_t, iptables_conf_t, iptables_conf_t)

policy/modules/system/netlabel.te

@@ -18,6 +18,7 @@ role system_r types netlabel_mgmt_t;
 # modify the network subsystem configuration
 allow netlabel_mgmt_t self:capability net_admin;
 allow netlabel_mgmt_t self:netlink_socket create_socket_perms;
+allow netlabel_mgmt_t self:netlink_generic_socket create_socket_perms;
 
 kernel_read_network_state(netlabel_mgmt_t)
 

policy/modules/system/sysnetwork.te

@@ -274,6 +274,7 @@ allow ifconfig_t self:packet_socket create_socket_perms;
 # generic netlink socket for iw
 # socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_GENERIC) = 3
 allow ifconfig_t self:netlink_socket create_socket_perms;
+allow ifconfig_t self:netlink_generic_socket create_socket_perms;
 allow ifconfig_t self:netlink_route_socket create_netlink_socket_perms;
 allow ifconfig_t self:netlink_xfrm_socket create_netlink_socket_perms;
 allow ifconfig_t self:tcp_socket { create ioctl };

policy/modules/system/udev.te

@@ -53,6 +53,7 @@ allow udev_t self:unix_stream_socket { listen accept };
 allow udev_t self:unix_dgram_socket sendto;
 allow udev_t self:unix_stream_socket connectto;
 allow udev_t self:netlink_kobject_uevent_socket create_socket_perms;
+allow udev_t self:netlink_generic_socket create_socket_perms;
 allow udev_t self:rawip_socket create_socket_perms;
 
 allow udev_t udev_exec_t:file write;

policy/support/obj_perm_sets.spt

@@ -28,7 +28,7 @@ define(`devfile_class_set', `{ chr_file blk_file }')
 #
 # All socket classes.
 #
-define(`socket_class_set', `{ tcp_socket udp_socket rawip_socket netlink_socket packet_socket unix_stream_socket unix_dgram_socket appletalk_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_kobject_uevent_socket tun_socket }')
+define(`socket_class_set', `{ tcp_socket udp_socket rawip_socket netlink_socket packet_socket unix_stream_socket unix_dgram_socket appletalk_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_kobject_uevent_socket tun_socket netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket netlink_crypto_socket }')
 
 
 #