500 lines
14 KiB
Plaintext
500 lines
14 KiB
Plaintext
policy_module(kernel, 1.22.0)
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########################################
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#
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# Declarations
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#
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## <desc>
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## <p>
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## Disable kernel module loading.
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## </p>
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## </desc>
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gen_bool(secure_mode_insmod, false)
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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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attribute can_dump_kernel;
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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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role system_r;
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role sysadm_r;
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role staff_r;
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role user_r;
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# here until order dependence is fixed:
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role unconfined_r;
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ifdef(`enable_mls',`
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role secadm_r;
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role auditadm_r;
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')
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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;
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domain_base_type(kernel_t)
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mls_rangetrans_source(kernel_t)
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role system_r types kernel_t;
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sid kernel gen_context(system_u:system_r:kernel_t,mls_systemhigh)
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#
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# DebugFS
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#
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type debugfs_t;
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files_mountpoint(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 / gen_context(system_u:object_r:debugfs_t,s0)
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#
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# kvmFS
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#
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type kvmfs_t;
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fs_type(kvmfs_t)
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genfscon kvmfs / gen_context(system_u:object_r:kvmfs_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 / gen_context(system_u:object_r:proc_t,s0)
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genfscon proc /sysvipc gen_context(system_u:object_r:proc_t,s0)
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type proc_afs_t, proc_type;
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genfscon proc /fs/openafs gen_context(system_u:object_r:proc_afs_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 gen_context(system_u:object_r:proc_kmsg_t,mls_systemhigh)
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neverallow ~{ can_receive_kernel_messages kern_unconfined } 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 ~{ can_dump_kernel kern_unconfined } proc_kcore_t:file ~getattr;
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genfscon proc /kcore gen_context(system_u:object_r:proc_kcore_t,mls_systemhigh)
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type proc_mdstat_t, proc_type;
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genfscon proc /mdstat gen_context(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 gen_context(system_u:object_r:proc_net_t,s0)
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type proc_xen_t, proc_type;
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files_mountpoint(proc_xen_t)
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genfscon proc /xen gen_context(system_u:object_r:proc_xen_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 gen_context(system_u:object_r:sysctl_t,s0)
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genfscon proc /sys gen_context(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 gen_context(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 gen_context(system_u:object_r:sysctl_rpc_t,s0)
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# /proc/sys/crypto directory and files
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type sysctl_crypto_t, sysctl_type;
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genfscon proc /sys/crypto gen_context(system_u:object_r:sysctl_crypto_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 gen_context(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 gen_context(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 gen_context(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 gen_context(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 gen_context(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 gen_context(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 gen_context(system_u:object_r:sysctl_vm_t,s0)
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type sysctl_vm_overcommit_t, sysctl_type;
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genfscon proc /sys/vm/overcommit_memory gen_context(system_u:object_r:sysctl_vm_overcommit_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 gen_context(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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# Mountpoint permissions are for the case when a file has been assigned
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# an extended attribute for the first time (old file_t). Directories
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# where filesystems are mounted may never get relabeled.
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#
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type unlabeled_t alias file_t;
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kernel_rootfs_mountpoint(unlabeled_t)
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files_mountpoint(unlabeled_t)
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fs_associate(unlabeled_t)
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sid file gen_context(system_u:object_r:unlabeled_t,s0)
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sid unlabeled gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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neverallow * unlabeled_t:file entrypoint;
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# These initial sids are no longer used, and can be removed:
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sid any_socket gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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sid file_labels gen_context(system_u:object_r:unlabeled_t,s0)
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sid icmp_socket gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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sid igmp_packet gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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sid init gen_context(system_u:object_r:unlabeled_t,s0)
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sid kmod gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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sid policy gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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sid scmp_packet gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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sid sysctl_modprobe gen_context(system_u:object_r:unlabeled_t,s0)
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sid sysctl_fs gen_context(system_u:object_r:unlabeled_t,s0)
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sid sysctl_kernel gen_context(system_u:object_r:unlabeled_t,s0)
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sid sysctl_net gen_context(system_u:object_r:unlabeled_t,s0)
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sid sysctl_net_unix gen_context(system_u:object_r:unlabeled_t,s0)
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sid sysctl_vm gen_context(system_u:object_r:unlabeled_t,s0)
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sid sysctl_dev gen_context(system_u:object_r:unlabeled_t,s0)
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sid tcp_socket gen_context(system_u:object_r:unlabeled_t,mls_systemhigh)
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########################################
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#
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# kernel local policy
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#
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allow kernel_t self:capability ~sys_module;
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allow kernel_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap };
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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_fifo_file_perms;
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allow kernel_t self:sock_file read_sock_file_perms;
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allow kernel_t self:fd use;
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allow kernel_t debugfs_t:dir search_dir_perms;
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allow kernel_t proc_t:dir list_dir_perms;
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allow kernel_t proc_t:file read_file_perms;
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allow kernel_t proc_t:lnk_file read_lnk_file_perms;
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allow kernel_t proc_net_t:dir list_dir_perms;
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allow kernel_t proc_net_t:file read_file_perms;
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allow kernel_t proc_mdstat_t:file read_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_kernel_t:dir list_dir_perms;
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allow kernel_t sysctl_kernel_t:file read_file_perms;
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allow kernel_t sysctl_t:dir list_dir_perms;
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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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# Kernel-generated traffic e.g., TCP resets on
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# connections with invalidated labels:
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allow kernel_t unlabeled_t:packet send;
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kernel_mounton_proc_dirs(kernel_t)
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kernel_request_load_module(kernel_t)
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# Allow unlabeled network traffic
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allow unlabeled_t unlabeled_t:packet { forward_in forward_out };
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corenet_in_generic_if(unlabeled_t)
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corenet_in_generic_node(unlabeled_t)
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corenet_all_recvfrom_unlabeled(kernel_t)
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corenet_all_recvfrom_netlabel(kernel_t)
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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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corenet_raw_send_generic_if(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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corenet_raw_send_generic_node(kernel_t)
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corenet_send_all_packets(kernel_t)
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dev_mounton_sysfs(kernel_t)
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dev_read_sysfs(kernel_t)
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dev_search_usbfs(kernel_t)
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# devtmpfs handling:
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dev_create_generic_dirs(kernel_t)
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dev_delete_generic_dirs(kernel_t)
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dev_create_generic_blk_files(kernel_t)
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dev_delete_generic_blk_files(kernel_t)
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dev_create_generic_chr_files(kernel_t)
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dev_delete_generic_chr_files(kernel_t)
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dev_mounton(kernel_t)
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dev_delete_generic_symlinks(kernel_t)
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dev_rw_generic_chr_files(kernel_t)
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dev_setattr_generic_blk_files(kernel_t)
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dev_setattr_generic_chr_files(kernel_t)
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dev_getattr_fs(kernel_t)
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dev_getattr_sysfs(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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fs_unmount_all_fs(kernel_t)
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fs_getattr_tmpfs(kernel_t)
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fs_getattr_tmpfs_dirs(kernel_t)
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fs_manage_tmpfs_dirs(kernel_t)
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fs_manage_tmpfs_files(kernel_t)
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fs_manage_tmpfs_sockets(kernel_t)
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fs_delete_tmpfs_symlinks(kernel_t)
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selinux_getattr_fs(kernel_t)
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selinux_load_policy(kernel_t)
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term_getattr_pty_fs(kernel_t)
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term_use_console(kernel_t)
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term_use_generic_ptys(kernel_t)
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# for kdevtmpfs
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term_setattr_unlink_unallocated_ttys(kernel_t)
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corecmd_exec_shell(kernel_t)
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corecmd_list_bin(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_getattr_rootfs(kernel_t)
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files_manage_root_dir(kernel_t)
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files_delete_root_files(kernel_t)
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files_exec_root_files(kernel_t)
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files_delete_root_symlinks(kernel_t)
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files_delete_root_chr_files(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_getattr_etc_runtime_dirs(kernel_t)
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files_mounton_etc_runtime_dirs(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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mcs_process_set_categories(kernel_t)
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mls_process_read_all_levels(kernel_t)
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mls_process_write_all_levels(kernel_t)
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mls_file_write_all_levels(kernel_t)
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mls_file_read_all_levels(kernel_t)
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ifdef(`distro_redhat',`
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# Bugzilla 222337
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fs_rw_tmpfs_chr_files(kernel_t)
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')
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ifdef(`init_systemd',`
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optional_policy(`
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dev_manage_input_dev(kernel_t)
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dev_filetrans_input_dev(kernel_t)
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')
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optional_policy(`
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selinux_compute_create_context(kernel_t)
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')
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optional_policy(`
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storage_dev_filetrans_fixed_disk(kernel_t)
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storage_setattr_fixed_disk_dev(kernel_t)
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storage_create_fixed_disk_dev(kernel_t)
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storage_delete_fixed_disk_dev(kernel_t)
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')
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')
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optional_policy(`
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# loop devices
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fstools_use_fds(kernel_t)
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')
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optional_policy(`
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hotplug_search_config(kernel_t)
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')
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optional_policy(`
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init_sigchld(kernel_t)
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')
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optional_policy(`
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libs_use_ld_so(kernel_t)
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libs_use_shared_libs(kernel_t)
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')
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optional_policy(`
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logging_manage_generic_logs(kernel_t)
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logging_send_syslog_msg(kernel_t)
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')
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optional_policy(`
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mount_use_fds(kernel_t)
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mount_read_loopback_files(kernel_t)
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')
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optional_policy(`
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nis_use_ypbind(kernel_t)
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')
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optional_policy(`
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plymouthd_read_lib_files(kernel_t)
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plymouthd_read_spool_files(kernel_t)
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term_use_ptmx(kernel_t)
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term_use_unallocated_ttys(kernel_t)
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')
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optional_policy(`
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# nfs kernel server needs kernel UDP access. It is less risky and painful
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# to just give it everything.
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allow kernel_t self:tcp_socket create_stream_socket_perms;
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allow kernel_t self:udp_socket create_socket_perms;
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# nfs kernel server needs kernel UDP access. It is less risky and painful
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# to just give it everything.
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corenet_udp_sendrecv_generic_if(kernel_t)
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corenet_udp_sendrecv_generic_node(kernel_t)
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corenet_udp_sendrecv_all_ports(kernel_t)
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corenet_udp_bind_generic_node(kernel_t)
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corenet_sendrecv_portmap_client_packets(kernel_t)
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corenet_sendrecv_generic_server_packets(kernel_t)
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fs_getattr_xattr_fs(kernel_t)
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auth_dontaudit_getattr_shadow(kernel_t)
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sysnet_read_config(kernel_t)
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rpc_manage_nfs_ro_content(kernel_t)
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rpc_manage_nfs_rw_content(kernel_t)
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rpc_tcp_rw_nfs_sockets(kernel_t)
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rpc_udp_rw_nfs_sockets(kernel_t)
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tunable_policy(`nfs_export_all_ro',`
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fs_getattr_noxattr_fs(kernel_t)
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fs_list_noxattr_fs(kernel_t)
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fs_read_noxattr_fs_files(kernel_t)
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fs_read_noxattr_fs_symlinks(kernel_t)
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files_list_non_auth_dirs(kernel_t)
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files_read_non_auth_files(kernel_t)
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files_read_non_auth_symlinks(kernel_t)
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')
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tunable_policy(`nfs_export_all_rw',`
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fs_getattr_noxattr_fs(kernel_t)
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fs_list_noxattr_fs(kernel_t)
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fs_read_noxattr_fs_files(kernel_t)
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fs_read_noxattr_fs_symlinks(kernel_t)
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files_manage_non_auth_files(kernel_t)
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')
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')
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optional_policy(`
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seutil_read_config(kernel_t)
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seutil_read_bin_policy(kernel_t)
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seutil_domtrans_setfiles(kernel_t)
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')
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optional_policy(`
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unconfined_domain_noaudit(kernel_t)
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')
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########################################
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#
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# Unlabeled process local policy
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#
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optional_policy(`
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# If you load a new policy that removes active domains, processes can
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# get stuck if you do not allow unlabeled processes to signal init.
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# If you load an incompatible policy, you should probably reboot,
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# since you may have compromised system security.
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init_sigchld(unlabeled_t)
|
|
')
|
|
|
|
########################################
|
|
#
|
|
# Kernel module loading policy
|
|
#
|
|
|
|
if( ! secure_mode_insmod ) {
|
|
allow can_load_kernmodule self:capability sys_module;
|
|
|
|
files_load_kernel_modules(can_load_kernmodule)
|
|
|
|
# load_module() calls stop_machine() which
|
|
# calls sched_setscheduler()
|
|
# gt: there seems to be no trace of the above, at
|
|
# least in kernel versions greater than 2.6.37...
|
|
allow can_load_kernmodule self:capability sys_nice;
|
|
kernel_setsched(can_load_kernmodule)
|
|
}
|
|
|
|
########################################
|
|
#
|
|
# Rules for unconfined acccess to this module
|
|
#
|
|
|
|
allow kern_unconfined proc_type:{ dir lnk_file } *;
|
|
allow kern_unconfined proc_type:file ~{ execmod entrypoint };
|
|
|
|
allow kern_unconfined sysctl_type:dir *;
|
|
allow kern_unconfined sysctl_type:file ~{ execmod entrypoint };
|
|
|
|
allow kern_unconfined kernel_t:system *;
|
|
|
|
allow kern_unconfined unlabeled_t:{ file chr_file } ~{ entrypoint execmod };
|
|
allow kern_unconfined unlabeled_t:{ dir lnk_file sock_file fifo_file blk_file } *;
|
|
allow kern_unconfined unlabeled_t:filesystem *;
|
|
allow kern_unconfined unlabeled_t:association *;
|
|
allow kern_unconfined unlabeled_t:packet *;
|
|
allow kern_unconfined unlabeled_t:process ~{ transition dyntransition execmem execstack execheap };
|