233 lines
7.3 KiB
Plaintext
233 lines
7.3 KiB
Plaintext
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policy_module(kernel,1.0)
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########################################
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#
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# Declarations
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#
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# assertion related attributes
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attribute can_load_kernmodule;
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attribute can_receive_kernel_messages;
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neverallow ~can_load_kernmodule self:capability sys_module;
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# domains with unconfined access to kernel resources
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attribute kern_unconfined;
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# regular entries in proc
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attribute proc_type;
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# sysctls
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attribute sysctl_type;
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#
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# kernel_t is the domain of kernel threads.
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# It is also the target type when checking permissions in the system class.
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#
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type kernel_t, can_load_kernmodule; # mlsprocread, mlsprocwrite, privrangetrans
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role system_r types kernel_t;
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domain_base_type(kernel_t)
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sid kernel context_template(system_u:system_r:kernel_t,s0 - s9:c0.c127, c0.c127)
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#
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# DebugFS
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#
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type debugfs_t;
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fs_type(debugfs_t)
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allow debugfs_t self:filesystem associate;
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genfscon debugfs / context_template(system_u:object_r:debugfs_t,s0)
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#
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# Procfs types
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#
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type proc_t, proc_type;
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files_mountpoint(proc_t)
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fs_type(proc_t)
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genfscon proc / context_template(system_u:object_r:proc_t,s0)
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genfscon proc /sysvipc context_template(system_u:object_r:proc_t,s0)
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# kernel message interface
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type proc_kmsg_t, proc_type;
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genfscon proc /kmsg context_template(system_u:object_r:proc_kmsg_t,s0)
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neverallow ~can_receive_kernel_messages proc_kmsg_t:file ~getattr;
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# /proc kcore: inaccessible
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type proc_kcore_t, proc_type;
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neverallow { domain -kern_unconfined } proc_kcore_t:file ~getattr;
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genfscon proc /kcore context_template(system_u:object_r:proc_kcore_t,s0)
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type proc_mdstat_t, proc_type;
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genfscon proc /mdstat context_template(system_u:object_r:proc_mdstat_t,s0)
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type proc_net_t, proc_type;
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genfscon proc /net context_template(system_u:object_r:proc_net_t,s0)
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#
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# Sysctl types
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#
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# /proc/sys directory, base directory of sysctls
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type sysctl_t, sysctl_type;
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files_mountpoint(sysctl_t)
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sid sysctl context_template(system_u:object_r:sysctl_t,s0)
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genfscon proc /sys context_template(system_u:object_r:sysctl_t,s0)
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# /proc/irq directory and files
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type sysctl_irq_t, sysctl_type;
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genfscon proc /irq context_template(system_u:object_r:sysctl_irq_t,s0)
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# /proc/net/rpc directory and files
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type sysctl_rpc_t, sysctl_type;
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genfscon proc /net/rpc context_template(system_u:object_r:sysctl_rpc_t,s0)
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# /proc/sys/fs directory and files
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type sysctl_fs_t, sysctl_type;
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files_mountpoint(sysctl_fs_t)
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genfscon proc /sys/fs context_template(system_u:object_r:sysctl_fs_t,s0)
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# /proc/sys/kernel directory and files
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type sysctl_kernel_t, sysctl_type;
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genfscon proc /sys/kernel context_template(system_u:object_r:sysctl_kernel_t,s0)
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# /proc/sys/kernel/modprobe file
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type sysctl_modprobe_t, sysctl_type;
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genfscon proc /sys/kernel/modprobe context_template(system_u:object_r:sysctl_modprobe_t,s0)
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# /proc/sys/kernel/hotplug file
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type sysctl_hotplug_t, sysctl_type;
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genfscon proc /sys/kernel/hotplug context_template(system_u:object_r:sysctl_hotplug_t,s0)
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# /proc/sys/net directory and files
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type sysctl_net_t, sysctl_type;
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genfscon proc /sys/net context_template(system_u:object_r:sysctl_net_t,s0)
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# /proc/sys/net/unix directory and files
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type sysctl_net_unix_t, sysctl_type;
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genfscon proc /sys/net/unix context_template(system_u:object_r:sysctl_net_unix_t,s0)
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# /proc/sys/vm directory and files
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type sysctl_vm_t, sysctl_type;
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genfscon proc /sys/vm context_template(system_u:object_r:sysctl_vm_t,s0)
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# /proc/sys/dev directory and files
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type sysctl_dev_t, sysctl_type;
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genfscon proc /sys/dev context_template(system_u:object_r:sysctl_dev_t,s0)
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#
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# unlabeled_t is the type of unlabeled objects.
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# Objects that have no known labeling information or that
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# have labels that are no longer valid are treated as having this type.
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#
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type unlabeled_t;
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sid unlabeled context_template(system_u:object_r:unlabeled_t,s0)
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# These initial sids are no longer used, and can be removed:
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sid any_socket context_template(system_u:object_r:unlabeled_t,s0)
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sid file_labels context_template(system_u:object_r:unlabeled_t,s0)
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sid icmp_socket context_template(system_u:object_r:unlabeled_t,s0)
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sid igmp_packet context_template(system_u:object_r:unlabeled_t,s0)
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sid init context_template(system_u:object_r:unlabeled_t,s0)
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sid kmod context_template(system_u:object_r:unlabeled_t,s0)
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sid netmsg context_template(system_u:object_r:unlabeled_t,s0)
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sid policy context_template(system_u:object_r:unlabeled_t,s0)
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sid scmp_packet context_template(system_u:object_r:unlabeled_t,s0)
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sid sysctl_modprobe context_template(system_u:object_r:unlabeled_t,s0)
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sid sysctl_fs context_template(system_u:object_r:unlabeled_t,s0)
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sid sysctl_kernel context_template(system_u:object_r:unlabeled_t,s0)
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sid sysctl_net context_template(system_u:object_r:unlabeled_t,s0)
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sid sysctl_net_unix context_template(system_u:object_r:unlabeled_t,s0)
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sid sysctl_vm context_template(system_u:object_r:unlabeled_t,s0)
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sid sysctl_dev context_template(system_u:object_r:unlabeled_t,s0)
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sid tcp_socket context_template(system_u:object_r:unlabeled_t,s0)
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########################################
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#
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# kernel local policy
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#
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# Use capabilities. need to investigate which capabilities are actually used
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allow kernel_t self:capability *;
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# Other possible mount points for the root fs are in files
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allow kernel_t unlabeled_t:dir mounton;
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# old general_domain_access()
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allow kernel_t self:shm create_shm_perms;
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allow kernel_t self:sem create_sem_perms;
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allow kernel_t self:msg { send receive };
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allow kernel_t self:msgq create_msgq_perms;
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allow kernel_t self:unix_dgram_socket create_socket_perms;
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allow kernel_t self:unix_stream_socket create_stream_socket_perms;
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allow kernel_t self:unix_dgram_socket sendto;
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allow kernel_t self:unix_stream_socket connectto;
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allow kernel_t self:fifo_file rw_file_perms;
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allow kernel_t self:fd use;
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# old general_proc_read_access():
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allow kernel_t proc_t:dir r_dir_perms;
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allow kernel_t proc_t:{ lnk_file file } r_file_perms;
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allow kernel_t proc_net_t:dir r_dir_perms;
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allow kernel_t proc_net_t:file r_file_perms;
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allow kernel_t proc_mdstat_t:file r_file_perms;
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allow kernel_t proc_kcore_t:file getattr;
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allow kernel_t proc_kmsg_t:file getattr;
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allow kernel_t sysctl_t:dir r_dir_perms;
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allow kernel_t sysctl_kernel_t:dir r_dir_perms;
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allow kernel_t sysctl_kernel_t:file r_file_perms;
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# cjp: this seems questionable
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allow kernel_t unlabeled_t:fifo_file rw_file_perms;
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# Kernel-generated traffic e.g., ICMP replies:
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corenet_raw_sendrecv_all_if(kernel_t)
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corenet_raw_sendrecv_all_nodes(kernel_t)
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# Kernel-generated traffic e.g., TCP resets:
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corenet_tcp_sendrecv_all_if(kernel_t)
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corenet_tcp_sendrecv_all_nodes(kernel_t)
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dev_read_sysfs(kernel_t)
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dev_search_usbfs(kernel_t)
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# Mount root file system. Used when loading a policy
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# from initrd, then mounting the root filesystem
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fs_mount_all_fs(kernel_t)
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selinux_load_policy(kernel_t)
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term_use_console(kernel_t)
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corecmd_exec_shell(kernel_t)
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corecmd_list_sbin(kernel_t)
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# /proc/sys/kernel/modprobe is set to /bin/true if not using modules.
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corecmd_exec_bin(kernel_t)
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domain_signal_all_domains(kernel_t)
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domain_search_all_domains_state(kernel_t)
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files_list_root(kernel_t)
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files_list_etc(kernel_t)
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files_list_home(kernel_t)
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files_read_usr_files(kernel_t)
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ifdef(`TODO',`
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ifdef(`targeted_policy', `
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unconfined_domain(kernel_t)
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')
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ifdef(`mls_policy', `
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# run init with maximum MLS range
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range_transition kernel_t init_exec_t s0 - s9:c0.c127;
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')
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') dnl end TODO
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########################################
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#
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# Unlabeled process local policy
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#
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ifdef(`targeted_policy',`
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allow unlabeled_t self:filesystem associate;
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')
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