selinux-policy/refpolicy/policy/modules/kernel/kernel.if

## <summary>
## Policy for kernel threads, proc filesystem,
## and unlabeled processes and objects.
## </summary>

########################################
## <desc>
##	Allows to start userland processes
##	by transitioning to the specified domain.
## </desc>
## <param name="domain">
##	The process type entered by kernel.
## </param>
## <param name="entrypoint">
##	The executable type for the entrypoint.
## </param>
#
interface(`kernel_userland_entry',`
	gen_require(`
		type kernel_t;
		class process sigchld;
		class fifo_file rw_file_perms;
		class fd use;
	')

	domain_auto_trans(kernel_t, $2, $1)

	allow $1 kernel_t:fd use;
	allow kernel_t $1:fd use;
	allow kernel_t $1:fifo_file rw_file_perms;
	allow $1 kernel_t:process sigchld;
')

########################################
## <desc>
##	Allows the kernel to mount filesystems on
##	the specified directory type.
## </desc>
## <param name="directory_type">
##	The type of the directory to use as a mountpoint.
## </param>
#
interface(`kernel_rootfs_mountpoint',`
	gen_require(`
		type kernel_t;
		class dir mounton;
	')

	allow kernel_t $1:dir mounton;
')

########################################
## <desc>
##	Send a SIGCHLD signal to kernel threads.
## </desc>
## <param name="domain">
##	The type of the process sending the signal.
## </param>
#
interface(`kernel_sigchld',`
	gen_require(`
		type kernel_t;
		class process sigchld;
	')

	allow kernel_t $1:process sigchld;
')

########################################
## <desc>
##	Allows the kernel to share state information with
##	the caller.
## </desc>
## <param name="domain">
##	The type of the process with which to share state information.
## </param>
#
interface(`kernel_share_state',`
	gen_require(`
		type kernel_t;
		class process share;
	')

	allow kernel_t $1:process share;
')

########################################
## <desc>
##	Permits caller to use kernel file descriptors.
## </desc>
## <param name="domain">
##	The type of the process using the descriptors.
## </param>
#
interface(`kernel_use_fd',`
	gen_require(`
		type kernel_t;
		class fd use;
	')

	allow $1 kernel_t:fd use;
')

########################################
## <desc>
##	Do not audit attempts to use
##	kernel file descriptors.
## </desc>
## <param name="domain">
##	The type of process not to audit.
## </param>
#
interface(`kernel_dontaudit_use_fd',`
	gen_require(`
		type kernel_t;
		class fd use;
	')

	dontaudit $1 kernel_t:fd use;
')

########################################
## <desc>
##	Allows caller to load kernel modules
## </desc>
## <param name="domain">
##	The process type to allow to load kernel modules.
## </param>
#
interface(`kernel_load_module',`
	gen_require(`
		attribute can_load_kernmodule;
		class capability sys_module;
	')

	allow $1 self:capability sys_module;
	typeattribute $1 can_load_kernmodule;
')

########################################
## <desc>
##	Allows caller to read the ring buffer.
## </desc>
## <param name="domain">
##	The process type allowed to read the ring buffer.
## </param>
#
interface(`kernel_read_ring_buffer',`
	gen_require(`
		type kernel_t;
		class system syslog_read;
	')

	allow $1 kernel_t:system syslog_read;
')

########################################
## <desc>
##	Do not audit attempts to read the ring buffer.
## </desc>
## <param name="domain">
##	The domain to not audit.
## </param>
#
interface(`kernel_dontaudit_read_ring_buffer',`
	gen_require(`
		type kernel_t;
		class system syslog_read;
	')

	dontaudit $1 kernel_t:system syslog_read;
')

########################################
## <summary>
##	Change the level of kernel messages logged to the console.
## </summary>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_change_ring_buffer_level',`
	gen_require(`
		type kernel_t;
		class system syslog_console;
	')

	allow $1 kernel_t:system syslog_console;
')

########################################
## <desc>
##	Allows the caller to clear the ring buffer.
## </desc>
## <param name="domain">
##	The process type clearing the buffer.
## </param>
#
interface(`kernel_clear_ring_buffer',`
	gen_require(`
		type kernel_t;
		class system syslog_mod;
	')

	allow $1 kernel_t:system syslog_mod;
')

########################################
## <desc>
##	Get information on all System V IPC objects.
## </desc>
## <param name="domain">
##	
## </param>
#
interface(`kernel_get_sysvipc_info',`
	gen_require(`
		type kernel_t;
		class system ipc_info;
	')

	allow $1 kernel_t:system ipc_info;
')

########################################
## <desc>
##	Allows caller to read system state information.
## </desc>
## <param name="domain">
##	The process type reading the system state information.
## </param>
#
interface(`kernel_read_system_state',`
	gen_require(`
		type proc_t;
		class dir r_dir_perms;
		class lnk_file { getattr read };
		class file r_file_perms;
	')

	allow $1 proc_t:dir r_dir_perms;
	allow $1 proc_t:lnk_file { getattr read };
	allow $1 proc_t:file r_file_perms;
')

########################################
## <desc>
##	Do not audit attempts by caller to
##	read system state information.
## </desc>
## <param name="domain">
##	The process type not to audit.
## </param>
#
interface(`kernel_dontaudit_read_system_state',`
	gen_require(`
		type proc_t;
		class file read;
	')

	allow $1 proc_t:file read;
')

#######################################
## <desc>
##	Allow caller to read the state information for software raid.
## </desc>
## <param name="domain">
##	The process type reading software raid state.
## </param>
#
interface(`kernel_read_software_raid_state',`
	gen_require(`
		type proc_t, proc_mdstat_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir r_dir_perms;
	allow $1 proc_mdstat_t:file r_file_perms;
')

########################################
## <desc>
##	Allows caller to get attribues of core kernel interface.
## </desc>
## <param name="domain">
##	The process type getting the attibutes.
## </param>
#
interface(`kernel_getattr_core',`
	gen_require(`
		type proc_t, proc_kcore_t;
		class dir { search getattr read };
		class file getattr;
	')

	allow $1 proc_t:dir r_dir_perms;
	allow $1 proc_kcore_t:file getattr;
')

########################################
## <desc>
##	Do not audit attempts to get the attributes of
##	core kernel interfaces.
## </desc>
## <param name="domain">
##	The process type to not audit.
## </param>
#
interface(`kernel_dontaudit_getattr_core',`
	gen_require(`
		type proc_kcore_t;
		class file getattr;
	')

	dontaudit $1 proc_kcore_t:file getattr;
')

########################################
## <desc>
##	Allow caller to read kernel messages
##	using the /proc/kmsg interface.
## </desc>
## <param name="domain">
##	The process type reading the messages.
## </param>
#
interface(`kernel_read_messages',`
	gen_require(`
		attribute can_receive_kernel_messages;
		type proc_kmsg_t, proc_t;
		class dir search;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 proc_kmsg_t:file r_file_perms;
	typeattribute $1 can_receive_kernel_messages;
')

########################################
## <desc>
##	Allow caller to get the attributes of kernel message
##	interface (/proc/kmsg).
## </desc>
## <param name="domain">
##	The process type getting the attributes.
## </param>
#
interface(`kernel_getattr_message_if',`
	gen_require(`
		type proc_kmsg_t, proc_t;
		class dir search;
		class file getattr;
	')

	allow $1 proc_t:dir search;
	allow $1 proc_kmsg_t:file getattr;
')

########################################
## <desc>
##	Do not audit attempts by caller to get the attributes of kernel
##	message interfaces.
## </desc>
## <param name="domain">
##	The process type not to audit.
## </param>
#
interface(`kernel_dontaudit_getattr_message_if',`
	gen_require(`
		type proc_kmsg_t, proc_t;
		class file getattr;
	')

	dontaudit $1 proc_kmsg_t:file getattr;
')

########################################
## <desc>
##	Allow caller to read the network state information.
## </desc>
## <param name="domain">
##	The process type reading the state.
## </param>
##
#
interface(`kernel_read_network_state',`
	gen_require(`
		type proc_t, proc_net_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 proc_net_t:dir r_dir_perms;
	allow $1 proc_net_t:file r_file_perms;
')

########################################
## <desc>
##	Do not audit attempts by caller to search the sysctl directory.
## </desc>
## <param name="domain">
##	The process type not to audit.
## </param>
##
#
interface(`kernel_dontaudit_search_sysctl_dir',`
	gen_require(`
		type sysctl_t;
		class dir search;
	')

	dontaudit $1 sysctl_t:dir search;
')

########################################
## <desc>
##	Allow caller to read the device sysctls.
## </desc>
## <param name="domain">
##	The process type to allow to read the device sysctls.
## </param>
#
interface(`kernel_read_device_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_dev_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_dev_t:dir r_dir_perms;
	allow $1 sysctl_dev_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write device sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_device_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_dev_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_dev_t:file rw_file_perms;
')

########################################
## <desc>
##	Allow caller to read virtual memory sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
##
#
interface(`kernel_read_vm_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_vm_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_vm_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write virtual memory sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_vm_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_vm_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_vm_t:file rw_file_perms;
')

########################################
## <desc>
##	Do not audit attempts by caller to search sysctl network directories.
## </desc>
## <param name="domain">
##	The process type not to audit.
## </param>
#
interface(`kernel_dontaudit_search_network_sysctl_dir',`
	gen_require(`
		type sysctl_net_t;
		class dir search;
	')

	dontaudit $1 sysctl_net_t:dir search;
')

########################################
## <desc>
##	Allow caller to read network sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
##
#
interface(`kernel_read_net_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_net_t;
		class dir r_dir_perms;
		class file f_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_net_t:dir r_dir_perms;
	allow $1 sysctl_net_t:file r_file_perms;
')

########################################
## <desc>
##	Allow caller to modiry contents of sysctl network files.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_net_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_net_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_net_t:dir r_dir_perms;
	allow $1 sysctl_net_t:file rw_file_perms;
')

########################################
## <desc>
##	Allow caller to read unix domain
##	socket sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_read_unix_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_net_t, sysctl_net_unix_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_net_t:dir r_dir_perms;
	allow $1 sysctl_net_unix_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write unix domain
##	socket sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_unix_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_net_t, sysctl_net_unix_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_net_t:dir r_dir_perms;
	allow $1 sysctl_net_unix_t:file rw_file_perms;
')

########################################
## <desc>
##	Read the hotplug sysctl.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_read_hotplug_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_kernel_t, sysctl_hotplug_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:dir r_dir_perms;
	allow $1 sysctl_hotplug_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write the hotplug sysctl.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_hotplug_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_kernel_t, sysctl_hotplug_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:dir r_dir_perms;
	allow $1 sysctl_hotplug_t:file rw_file_perms;
')

########################################
## <desc>
##	Read the modprobe sysctl.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_read_modprobe_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_kernel_t, sysctl_modprobe_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:dir r_dir_perms;
	allow $1 sysctl_modprobe_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write the modprobe sysctl.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_modprobe_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_kernel_t, sysctl_modprobe_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:dir r_dir_perms;
	allow $1 sysctl_modprobe_t:file rw_file_perms;
')

########################################
## <desc>
##	Read generic kernel sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_read_kernel_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_kernel_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write generic kernel sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_kernel_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_kernel_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:dir r_dir_perms;
	allow $1 sysctl_kernel_t:file rw_file_perms;
')

########################################
## <desc>
##	Read filesystem sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_read_fs_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_fs_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_fs_t:dir r_dir_perms;
	allow $1 sysctl_fs_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write fileystem sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_fs_sysctl',`
	gen_require(`
		type proc_t, sysctl_t, sysctl_fs_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_t:dir r_dir_perms;
	allow $1 sysctl_fs_t:dir r_dir_perms;
	allow $1 sysctl_fs_t:file rw_file_perms;
')

########################################
## <desc>
##	Read IRQ sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_read_irq_sysctl',`
	gen_require(`
		type proc_t, sysctl_irq_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_irq_t:dir r_dir_perms;
	allow $1 sysctl_irq_t:file r_file_perms;
')

########################################
## <desc>
##	Read and write IRQ sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
##
#
interface(`kernel_rw_irq_sysctl',`
	gen_require(`
		type proc_t, sysctl_irq_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 sysctl_irq_t:dir r_dir_perms;
	allow $1 sysctl_irq_t:file rw_file_perms;
')

########################################
#
# kernel_read_rpc_sysctl(domain)
#
interface(`kernel_read_rpc_sysctl',`
	gen_require(`
		type proc_t, proc_net_t, sysctl_rpc_t;
		class dir r_dir_perms;
		class file r_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 proc_net_t:dir search;
	allow $1 sysctl_rpc_t:dir r_dir_perms;
	allow $1 sysctl_rpc_t:file r_file_perms;
')

########################################
#
# kernel_rw_rpc_sysctl(domain)
#
interface(`kernel_rw_rpc_sysctl',`
	gen_require(`
		type proc_t, proc_net_t, sysctl_rpc_t;
		class dir r_dir_perms;
		class file rw_file_perms;
	')

	allow $1 proc_t:dir search;
	allow $1 proc_net_t:dir search;
	allow $1 sysctl_rpc_t:dir r_dir_perms;
	allow $1 sysctl_rpc_t:file rw_file_perms;
')

########################################
## <desc>
##	Allow caller to read all sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_read_all_sysctl',`
	kernel_read_device_sysctl($1)
	kernel_read_vm_sysctl($1)
	kernel_read_net_sysctl($1)
	kernel_read_unix_sysctl($1)
	kernel_read_hotplug_sysctl($1)
	kernel_read_modprobe_sysctl($1)
	kernel_read_kernel_sysctl($1)
	kernel_read_fs_sysctl($1)
	kernel_read_irq_sysctl($1)
	kernel_read_rpc_sysctl($1)
')

########################################
## <desc>
##	Read and write all sysctls.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_rw_all_sysctl',`
	kernel_rw_device_sysctl($1)
	kernel_rw_vm_sysctl($1)
	kernel_rw_net_sysctl($1)
	kernel_rw_unix_sysctl($1)
	kernel_rw_hotplug_sysctl($1)
	kernel_rw_modprobe_sysctl($1)
	kernel_rw_kernel_sysctl($1)
	kernel_rw_fs_sysctl($1)
	kernel_rw_irq_sysctl($1)
	kernel_rw_rpc_sysctl($1)
')

########################################
## <desc>
##	Send a kill signal to unlabeled processes.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_kill_unlabeled',`
	gen_require(`
		type unlabeled_t;
		class process sigkill;
	')

	allow $1 unlabeled_t:process sigkill;
')

########################################
## <desc>
##	Send general signals to unlabeled processes.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_signal_unlabeled',`
	gen_require(`
		type unlabeled_t;
		class process signal;
	')

	allow $1 unlabeled_t:process signal;
')

########################################
## <desc>
##	Send a null signal to unlabeled processes.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_signull_unlabeled',`
	gen_require(`
		type unlabeled_t;
		class process signull;
	')

	allow $1 unlabeled_t:process signull;
')

########################################
## <desc>
##	Send a stop signal to unlabeled processes.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_sigstop_unlabeled',`
	gen_require(`
		type unlabeled_t;
		class process sigstop;
	')

	allow $1 unlabeled_t:process sigstop;
')

########################################
## <desc>
##	Send a child terminated signal to unlabeled processes.
## </desc>
## <param name="domain">
##	The type of the process performing this action.
## </param>
#
interface(`kernel_sigchld_unlabeled',`
	gen_require(`
		type unlabeled_t;
		class process sigchld;
	')

	allow $1 unlabeled_t:process sigchld;
')

########################################
## <desc>
##	Do not audit attempts by caller to get attributes for
##	unlabeled block devices.
## </desc>
## <param name="domain">
##	The process type not to audit.
## </param>
#
interface(`kernel_dontaudit_getattr_unlabeled_blk_dev',`
	gen_require(`
		type unlabeled_t;
		class process getattr;
	')

	allow $1 unlabeled_t:blk_file getattr;
')

########################################
## <desc>
##	Allow caller to relabel unlabeled objects.
## </desc>
## <param name="domain">
##	The process type relabeling the objects.
## </param>
#
interface(`kernel_relabel_unlabeled',`
	gen_require(`
		type unlabeled_t;
		class dir { getattr relabelfrom };
		class file { getattr relabelfrom };
		class lnk_file { getattr relabelfrom };
		class fifo_file { getattr relabelfrom };
		class sock_file { getattr relabelfrom };
		class chr_file { getattr relabelfrom };
		class blk_file { getattr relabelfrom };
	')

	allow $1 unlabeled_t:dir_file_class_set { getattr relabelfrom };
')