00b180dfb8
As reported by sepolicy-analyze -D -P /path/to/sepolicy. No semantic difference reported by sediff between the policy before and after this change. Deduplication of selinuxfs read access resolved by taking the common rules to domain.te (and thereby getting rid of the selinux_getenforce macro altogether). Change-Id: I4de2f86fe2efe11a167e8a7d25dd799cefe482e5 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
369 lines
14 KiB
Text
369 lines
14 KiB
Text
#
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# System Server aka system_server spawned by zygote.
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# Most of the framework services run in this process.
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#
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type system_server, domain, mlstrustedsubject;
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# Define a type for tmpfs-backed ashmem regions.
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tmpfs_domain(system_server)
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# Dalvik Compiler JIT Mapping.
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allow system_server self:process execmem;
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allow system_server ashmem_device:chr_file execute;
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allow system_server system_server_tmpfs:file execute;
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# For art.
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allow system_server dalvikcache_data_file:file execute;
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# /data/resource-cache
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allow system_server resourcecache_data_file:file r_file_perms;
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allow system_server resourcecache_data_file:dir r_dir_perms;
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# ptrace to processes in the same domain for debugging crashes.
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allow system_server self:process ptrace;
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# Child of the zygote.
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allow system_server zygote:fd use;
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allow system_server zygote:process sigchld;
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allow system_server zygote_tmpfs:file read;
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# May kill zygote on crashes.
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allow system_server zygote:process sigkill;
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# Read /system/bin/app_process.
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allow system_server zygote_exec:file r_file_perms;
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# Needed to close the zygote socket, which involves getopt / getattr
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allow system_server zygote:unix_stream_socket { getopt getattr };
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# system server gets network and bluetooth permissions.
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net_domain(system_server)
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bluetooth_domain(system_server)
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# These are the capabilities assigned by the zygote to the
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# system server.
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allow system_server self:capability {
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kill
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net_admin
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net_bind_service
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net_broadcast
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net_raw
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sys_boot
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sys_module
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sys_nice
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sys_resource
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sys_time
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sys_tty_config
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};
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wakelock_use(system_server)
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# Triggered by /proc/pid accesses, not allowed.
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dontaudit system_server self:capability sys_ptrace;
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# Trigger module auto-load.
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allow system_server kernel:system module_request;
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# Use netlink uevent sockets.
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allow system_server self:netlink_kobject_uevent_socket create_socket_perms;
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# Use generic netlink sockets.
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allow system_server self:netlink_socket create_socket_perms;
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# Kill apps.
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allow system_server appdomain:process { sigkill signal };
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# Set scheduling info for apps.
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allow system_server appdomain:process { getsched setsched };
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allow system_server mediaserver:process { getsched setsched };
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# Read /proc/pid data for apps.
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r_dir_file(system_server, appdomain)
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# Write to /proc/pid/oom_adj_score for apps.
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allow system_server appdomain:file write;
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# Silently deny access to any /proc/pid files other than
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# the ones allowed via allow rule. Avoids filling the logs
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# with noise from /proc/pid traversals by ActivityManager,
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# CpuTracker, and possibly other system_server components.
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dontaudit system_server domain:dir r_dir_perms;
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dontaudit system_server domain:{ file lnk_file } r_file_perms;
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# Read/Write to /proc/net/xt_qtaguid/ctrl and and /dev/xt_qtaguid.
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allow system_server qtaguid_proc:file rw_file_perms;
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allow system_server qtaguid_device:chr_file rw_file_perms;
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# Write to /proc/sysrq-trigger.
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allow system_server proc_sysrq:file rw_file_perms;
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# Read /sys/kernel/debug/wakeup_sources.
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allow system_server debugfs:file r_file_perms;
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# WifiWatchdog uses a packet_socket
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allow system_server self:packet_socket create_socket_perms;
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# 3rd party VPN clients require a tun_socket to be created
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allow system_server self:tun_socket create_socket_perms;
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# Notify init of death.
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allow system_server init:process sigchld;
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# Talk to init and various daemons via sockets.
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unix_socket_connect(system_server, property, init)
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unix_socket_connect(system_server, installd, installd)
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unix_socket_connect(system_server, lmkd, lmkd)
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unix_socket_connect(system_server, mtpd, mtp)
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unix_socket_connect(system_server, netd, netd)
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unix_socket_connect(system_server, vold, vold)
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unix_socket_connect(system_server, zygote, zygote)
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unix_socket_connect(system_server, gps, gpsd)
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unix_socket_connect(system_server, racoon, racoon)
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unix_socket_send(system_server, wpa, wpa)
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# Communicate over a socket created by surfaceflinger.
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allow system_server surfaceflinger:unix_stream_socket { read write setopt };
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# Perform Binder IPC.
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binder_use(system_server)
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binder_call(system_server, binderservicedomain)
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binder_call(system_server, appdomain)
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binder_call(system_server, dumpstate)
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binder_service(system_server)
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# Read /proc/pid files for dumping stack traces of native processes.
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r_dir_file(system_server, mediaserver)
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r_dir_file(system_server, sdcardd)
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r_dir_file(system_server, surfaceflinger)
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r_dir_file(system_server, inputflinger)
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# Use sockets received over binder from various services.
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allow system_server mediaserver:tcp_socket rw_socket_perms;
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allow system_server mediaserver:udp_socket rw_socket_perms;
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# Check SELinux permissions.
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selinux_check_access(system_server)
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# XXX Label sysfs files with a specific type?
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allow system_server sysfs:file rw_file_perms;
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allow system_server sysfs_nfc_power_writable:file rw_file_perms;
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allow system_server sysfs_devices_system_cpu:file w_file_perms;
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# Access devices.
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allow system_server device:dir r_dir_perms;
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allow system_server mdns_socket:sock_file rw_file_perms;
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allow system_server alarm_device:chr_file rw_file_perms;
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allow system_server gpu_device:chr_file rw_file_perms;
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allow system_server iio_device:chr_file rw_file_perms;
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allow system_server input_device:dir r_dir_perms;
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allow system_server input_device:chr_file rw_file_perms;
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allow system_server radio_device:chr_file r_file_perms;
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allow system_server tty_device:chr_file rw_file_perms;
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allow system_server usbaccessory_device:chr_file rw_file_perms;
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allow system_server video_device:dir r_dir_perms;
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allow system_server video_device:chr_file rw_file_perms;
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allow system_server adbd_socket:sock_file rw_file_perms;
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# tun device used for 3rd party vpn apps
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allow system_server tun_device:chr_file rw_file_perms;
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# Manage system data files.
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allow system_server system_data_file:dir create_dir_perms;
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allow system_server system_data_file:notdevfile_class_set create_file_perms;
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# Manage /data/app.
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allow system_server apk_data_file:dir create_dir_perms;
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allow system_server apk_data_file:file create_file_perms;
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allow system_server apk_tmp_file:file create_file_perms;
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# Manage /data/app-private.
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allow system_server apk_private_data_file:dir create_dir_perms;
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allow system_server apk_private_data_file:file create_file_perms;
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allow system_server apk_private_tmp_file:file create_file_perms;
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# Manage files within asec containers.
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allow system_server asec_apk_file:dir create_dir_perms;
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allow system_server asec_apk_file:file create_file_perms;
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allow system_server asec_public_file:file create_file_perms;
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# Manage /data/anr.
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allow system_server anr_data_file:dir create_dir_perms;
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allow system_server anr_data_file:file create_file_perms;
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# Manage /data/backup.
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allow system_server backup_data_file:dir create_dir_perms;
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allow system_server backup_data_file:file create_file_perms;
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# Manage /data/dalvik-cache.
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allow system_server dalvikcache_data_file:dir create_dir_perms;
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allow system_server dalvikcache_data_file:file create_file_perms;
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# Read from /data/dalvik-cache/profiles
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allow system_server dalvikcache_profiles_data_file:dir rw_dir_perms;
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allow system_server dalvikcache_profiles_data_file:file create_file_perms;
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# Manage /data/misc/adb.
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allow system_server adb_keys_file:dir create_dir_perms;
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allow system_server adb_keys_file:file create_file_perms;
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# Manage /data/misc/sms.
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# TODO: Split into a separate type?
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allow system_server radio_data_file:dir create_dir_perms;
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allow system_server radio_data_file:file create_file_perms;
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# Manage /data/misc/systemkeys.
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allow system_server systemkeys_data_file:dir create_dir_perms;
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allow system_server systemkeys_data_file:file create_file_perms;
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# Access /data/tombstones.
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allow system_server tombstone_data_file:dir r_dir_perms;
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allow system_server tombstone_data_file:file r_file_perms;
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# Manage /data/misc/vpn.
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allow system_server vpn_data_file:dir create_dir_perms;
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allow system_server vpn_data_file:file create_file_perms;
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# Manage /data/misc/wifi.
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allow system_server wifi_data_file:dir create_dir_perms;
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allow system_server wifi_data_file:file create_file_perms;
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# Manage /data/misc/zoneinfo.
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allow system_server zoneinfo_data_file:dir create_dir_perms;
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allow system_server zoneinfo_data_file:file create_file_perms;
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# Walk /data/data subdirectories.
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# Types extracted from seapp_contexts type= fields.
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allow system_server { system_app_data_file bluetooth_data_file nfc_data_file radio_data_file shell_data_file app_data_file }:dir { getattr read search };
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# Also permit for unlabeled /data/data subdirectories and
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# for unlabeled asec containers on upgrades from 4.2.
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allow system_server unlabeled:dir r_dir_perms;
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# Read pkg.apk file before it has been relabeled by vold.
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allow system_server unlabeled:file r_file_perms;
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# Populate com.android.providers.settings/databases/settings.db.
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allow system_server system_app_data_file:dir create_dir_perms;
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allow system_server system_app_data_file:file create_file_perms;
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# Receive and use open app data files passed over binder IPC.
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# Types extracted from seapp_contexts type= fields.
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allow system_server { system_app_data_file bluetooth_data_file nfc_data_file radio_data_file shell_data_file app_data_file }:file { getattr read write };
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# Receive and use open /data/media files passed over binder IPC.
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allow system_server media_rw_data_file:file { getattr read write };
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# Read /file_contexts and /data/security/file_contexts
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security_access_policy(system_server)
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# Relabel apk files.
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allow system_server { apk_tmp_file apk_private_tmp_file }:file { relabelfrom relabelto };
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allow system_server { apk_data_file apk_private_data_file }:file { relabelfrom relabelto };
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# Relabel wallpaper.
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allow system_server system_data_file:file relabelfrom;
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allow system_server wallpaper_file:file relabelto;
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allow system_server wallpaper_file:file { rw_file_perms unlink };
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# Relabel /data/anr.
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allow system_server system_data_file:dir relabelfrom;
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allow system_server anr_data_file:dir relabelto;
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# Property Service write
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allow system_server system_prop:property_service set;
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allow system_server radio_prop:property_service set;
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allow system_server debug_prop:property_service set;
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allow system_server powerctl_prop:property_service set;
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# ctl interface
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allow system_server ctl_default_prop:property_service set;
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allow system_server ctl_bugreport_prop:property_service set;
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# Create a socket for receiving info from wpa.
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type_transition system_server wifi_data_file:sock_file system_wpa_socket;
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type_transition system_server wpa_socket:sock_file system_wpa_socket;
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allow system_server wpa_socket:dir rw_dir_perms;
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allow system_server system_wpa_socket:sock_file create_file_perms;
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# Remove sockets created by wpa_supplicant
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allow system_server wpa_socket:sock_file unlink;
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# Create a socket for connections from debuggerd.
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type_transition system_server system_data_file:sock_file system_ndebug_socket "ndebugsocket";
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allow system_server system_ndebug_socket:sock_file create_file_perms;
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# Specify any arguments to zygote.
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allow system_server self:zygote { specifyids specifyrlimits specifyseinfo };
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# Manage cache files.
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allow system_server cache_file:dir { relabelfrom create_dir_perms };
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allow system_server cache_file:file { relabelfrom create_file_perms };
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# Run system programs, e.g. dexopt.
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allow system_server system_file:file x_file_perms;
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# LocationManager(e.g, GPS) needs to read and write
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# to uart driver and ctrl proc entry
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allow system_server gps_device:chr_file rw_file_perms;
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allow system_server gps_control:file rw_file_perms;
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# Allow system_server to use app-created sockets and pipes.
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allow system_server appdomain:{ tcp_socket udp_socket } { getattr getopt setopt read write shutdown };
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allow system_server appdomain:fifo_file { getattr read write };
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# Allow abstract socket connection
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allow system_server rild:unix_stream_socket connectto;
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# BackupManagerService lets PMS create a data backup file
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allow system_server cache_backup_file:file create_file_perms;
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# Relabel /data/backup
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allow system_server backup_data_file:dir { relabelto relabelfrom };
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# Relabel /cache/.*\.{data|restore}
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allow system_server cache_backup_file:file { relabelto relabelfrom };
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# LocalTransport creates and relabels /cache/backup
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allow system_server cache_backup_file:dir { relabelto relabelfrom create_dir_perms };
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# Allow system to talk to usb device
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allow system_server usb_device:chr_file rw_file_perms;
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allow system_server usb_device:dir r_dir_perms;
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# Allow system to talk to sensors
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allow system_server sensors_device:chr_file rw_file_perms;
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# Read from HW RNG (needed by EntropyMixer).
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allow system_server hw_random_device:chr_file r_file_perms;
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# Read and delete files under /dev/fscklogs.
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r_dir_file(system_server, fscklogs)
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allow system_server fscklogs:dir { write remove_name };
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allow system_server fscklogs:file unlink;
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# For SELinuxPolicyInstallReceiver
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selinux_manage_policy(system_server)
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# logd access, system_server inherit logd write socket
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# (urge is to deprecate this long term)
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allow system_server zygote:unix_dgram_socket write;
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# Read from log daemon.
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read_logd(system_server)
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# Be consistent with DAC permissions. Allow system_server to write to
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# /sys/module/lowmemorykiller/parameters/adj
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# /sys/module/lowmemorykiller/parameters/minfree
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allow system_server sysfs_lowmemorykiller:file { getattr w_file_perms };
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# Read /sys/fs/pstore/console-ramoops
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# Don't worry about overly broad permissions for now, as there's
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# only one file in /sys/fs/pstore
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allow system_server pstorefs:dir r_dir_perms;
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allow system_server pstorefs:file r_file_perms;
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allow system_server system_server_service:service_manager add;
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###
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### Neverallow rules
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###
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### system_server should NEVER do any of this
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# Do not allow accessing SDcard files as unsafe ejection could
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# cause the kernel to kill the system_server.
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# neverallow system_server sdcard_type:file rw_file_perms;
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