Alex Klyubin | 1fdee11 | 2013-09-13 15:59:04 -0700 | [diff] [blame] | 1 | # |
| 2 | # System Server aka system_server spawned by zygote. |
| 3 | # Most of the framework services run in this process. |
| 4 | # |
Stephen Smalley | 1ff6441 | 2013-10-29 14:42:40 -0400 | [diff] [blame] | 5 | type system_server, domain, mlstrustedsubject; |
| 6 | permissive system_server; |
| 7 | |
| 8 | # Dalvik Compiler JIT Mapping. |
| 9 | allow system_server self:process execmem; |
| 10 | |
| 11 | # Child of the zygote. |
| 12 | allow system_server zygote:fd use; |
| 13 | allow system_server zygote:process sigchld; |
| 14 | allow system_server zygote_tmpfs:file read; |
| 15 | |
| 16 | # system server gets network and bluetooth permissions. |
| 17 | net_domain(system_server) |
| 18 | bluetooth_domain(system_server) |
Alex Klyubin | 1fdee11 | 2013-09-13 15:59:04 -0700 | [diff] [blame] | 19 | |
Alex Klyubin | 1fdee11 | 2013-09-13 15:59:04 -0700 | [diff] [blame] | 20 | # These are the capabilities assigned by the zygote to the |
| 21 | # system server. |
| 22 | allow system_server self:capability { |
| 23 | kill |
| 24 | net_admin |
| 25 | net_bind_service |
| 26 | net_broadcast |
| 27 | net_raw |
| 28 | sys_boot |
| 29 | sys_module |
| 30 | sys_nice |
| 31 | sys_resource |
| 32 | sys_time |
| 33 | sys_tty_config |
| 34 | }; |
| 35 | |
Stephen Smalley | 1ff6441 | 2013-10-29 14:42:40 -0400 | [diff] [blame] | 36 | # Triggered by /proc/pid accesses, not allowed. |
| 37 | dontaudit system_server self:capability sys_ptrace; |
| 38 | |
| 39 | # Trigger module auto-load. |
| 40 | allow system_server kernel:system module_request; |
| 41 | |
| 42 | # Use netlink uevent sockets. |
| 43 | allow system_server self:netlink_kobject_uevent_socket *; |
| 44 | |
| 45 | # Kill apps. |
| 46 | allow system_server appdomain:process { sigkill signal }; |
| 47 | |
| 48 | # Set scheduling info for apps. |
| 49 | allow system_server appdomain:process { getsched setsched }; |
| 50 | allow system_server mediaserver:process { getsched setsched }; |
| 51 | |
| 52 | # Read /proc data for apps. |
| 53 | allow system_server appdomain:dir r_dir_perms; |
| 54 | allow system_server appdomain:{ file lnk_file } rw_file_perms; |
| 55 | |
| 56 | # Read/Write to /proc/net/xt_qtaguid/ctrl and and /dev/xt_qtaguid. |
| 57 | allow system_server qtaguid_proc:file rw_file_perms; |
| 58 | allow system_server qtaguid_device:chr_file rw_file_perms; |
| 59 | |
| 60 | # Read /sys/kernel/debug/wakeup_sources. |
| 61 | allow system_server debugfs:file r_file_perms; |
| 62 | |
| 63 | # WifiWatchdog uses a packet_socket |
| 64 | allow system_server self:packet_socket *; |
| 65 | |
| 66 | # 3rd party VPN clients require a tun_socket to be created |
| 67 | allow system_server self:tun_socket create; |
| 68 | |
| 69 | # Notify init of death. |
| 70 | allow system_server init:process sigchld; |
| 71 | |
| 72 | # Talk to init and various daemons via sockets. |
| 73 | unix_socket_connect(system_server, property, init) |
| 74 | unix_socket_connect(system_server, qemud, qemud) |
| 75 | unix_socket_connect(system_server, installd, installd) |
| 76 | unix_socket_connect(system_server, netd, netd) |
| 77 | unix_socket_connect(system_server, vold, vold) |
| 78 | unix_socket_connect(system_server, zygote, zygote) |
| 79 | unix_socket_connect(system_server, keystore, keystore) |
| 80 | unix_socket_connect(system_server, gps, gpsd) |
| 81 | unix_socket_connect(system_server, racoon, racoon) |
| 82 | unix_socket_send(system_server, wpa, wpa) |
| 83 | |
| 84 | # Communicate over a socket created by surfaceflinger. |
| 85 | allow system_server surfaceflinger:unix_stream_socket { read write setopt }; |
| 86 | |
| 87 | # Perform Binder IPC. |
| 88 | tmpfs_domain(system_server) |
| 89 | binder_use(system_server) |
| 90 | binder_call(system_server, binderservicedomain) |
| 91 | binder_call(system_server, appdomain) |
Stephen Smalley | 2a604ad | 2013-11-04 09:53:46 -0500 | [diff] [blame^] | 92 | binder_call(system_server, healthd) |
Stephen Smalley | 1ff6441 | 2013-10-29 14:42:40 -0400 | [diff] [blame] | 93 | binder_service(system_server) |
| 94 | |
| 95 | # Read /proc/pid files for Binder clients. |
| 96 | r_dir_file(system_server, appdomain) |
| 97 | r_dir_file(system_server, mediaserver) |
| 98 | allow system_server appdomain:process getattr; |
| 99 | allow system_server mediaserver:process getattr; |
| 100 | |
| 101 | # Check SELinux permissions. |
| 102 | selinux_check_access(system_server) |
| 103 | |
| 104 | # XXX Label sysfs files with a specific type? |
| 105 | allow system_server sysfs:file rw_file_perms; |
| 106 | allow system_server sysfs_nfc_power_writable:file rw_file_perms; |
| 107 | |
| 108 | # Access devices. |
| 109 | allow system_server device:dir r_dir_perms; |
| 110 | allow system_server mdns_socket:sock_file rw_file_perms; |
| 111 | allow system_server alarm_device:chr_file rw_file_perms; |
| 112 | allow system_server graphics_device:dir search; |
| 113 | allow system_server graphics_device:chr_file rw_file_perms; |
| 114 | allow system_server iio_device:chr_file rw_file_perms; |
| 115 | allow system_server input_device:dir r_dir_perms; |
| 116 | allow system_server input_device:chr_file rw_file_perms; |
| 117 | allow system_server tty_device:chr_file rw_file_perms; |
| 118 | allow system_server urandom_device:chr_file rw_file_perms; |
| 119 | allow system_server usbaccessory_device:chr_file rw_file_perms; |
| 120 | allow system_server video_device:chr_file rw_file_perms; |
| 121 | allow system_server qemu_device:chr_file rw_file_perms; |
| 122 | allow system_server adbd_socket:sock_file rw_file_perms; |
| 123 | |
| 124 | # tun device used for 3rd party vpn apps |
| 125 | allow system_server tun_device:chr_file rw_file_perms; |
| 126 | |
| 127 | # Manage data files. |
| 128 | allow system_server data_file_type:dir create_dir_perms; |
| 129 | allow system_server data_file_type:notdevfile_class_set create_file_perms; |
| 130 | |
| 131 | # Read /file_contexts and /data/security/file_contexts |
| 132 | security_access_policy(system_server) |
| 133 | |
| 134 | # Relabel apk files. |
| 135 | relabelto_domain(system_server) |
| 136 | allow system_server { apk_tmp_file apk_private_tmp_file }:file { relabelfrom relabelto }; |
| 137 | allow system_server { apk_data_file apk_private_data_file }:file { relabelfrom relabelto }; |
| 138 | |
| 139 | # Relabel wallpaper. |
| 140 | allow system_server system_data_file:file relabelfrom; |
| 141 | allow system_server wallpaper_file:file relabelto; |
| 142 | allow system_server wallpaper_file:file rw_file_perms; |
| 143 | |
| 144 | # Relabel /data/anr. |
| 145 | allow system_server system_data_file:dir relabelfrom; |
| 146 | allow system_server anr_data_file:dir relabelto; |
| 147 | |
| 148 | # Property Service write |
| 149 | allow system_server system_prop:property_service set; |
| 150 | allow system_server radio_prop:property_service set; |
Nick Kralevich | dd1ec6d | 2013-11-01 10:45:03 -0700 | [diff] [blame] | 151 | allow system_server debug_prop:property_service set; |
Nick Kralevich | cd95e0a | 2013-11-01 12:16:36 -0700 | [diff] [blame] | 152 | allow system_server powerctl_prop:property_service set; |
Stephen Smalley | 1ff6441 | 2013-10-29 14:42:40 -0400 | [diff] [blame] | 153 | |
| 154 | # ctl interface |
| 155 | allow system_server ctl_default_prop:property_service set; |
| 156 | |
Alex Klyubin | 1fdee11 | 2013-09-13 15:59:04 -0700 | [diff] [blame] | 157 | # Create a socket for receiving info from wpa. |
| 158 | type_transition system_server wifi_data_file:sock_file system_wpa_socket; |
Stephen Smalley | 45ba665 | 2013-09-27 10:24:49 -0400 | [diff] [blame] | 159 | allow system_server system_wpa_socket:sock_file create_file_perms; |
| 160 | |
| 161 | # Create a socket for connections from debuggerd. |
| 162 | type_transition system_server system_data_file:sock_file system_ndebug_socket "ndebugsocket"; |
| 163 | allow system_server system_ndebug_socket:sock_file create_file_perms; |
| 164 | |
Stephen Smalley | 1ff6441 | 2013-10-29 14:42:40 -0400 | [diff] [blame] | 165 | # Specify any arguments to zygote. |
Alex Klyubin | 1fdee11 | 2013-09-13 15:59:04 -0700 | [diff] [blame] | 166 | allow system_server self:zygote { specifyids specifyrlimits specifyseinfo }; |
| 167 | |
Stephen Smalley | 1ff6441 | 2013-10-29 14:42:40 -0400 | [diff] [blame] | 168 | # Manage cache files. |
| 169 | allow system_server cache_file:dir { relabelfrom create_dir_perms }; |
| 170 | allow system_server cache_file:file { relabelfrom create_file_perms }; |
| 171 | |
| 172 | # Run system programs, e.g. dexopt. |
| 173 | allow system_server system_file:file x_file_perms; |
| 174 | |
| 175 | # Allow reading of /proc/pid data for other domains. |
| 176 | # XXX dontaudit candidate |
| 177 | allow system_server domain:dir r_dir_perms; |
| 178 | allow system_server domain:file r_file_perms; |
| 179 | |
| 180 | # LocationManager(e.g, GPS) needs to read and write |
| 181 | # to uart driver and ctrl proc entry |
| 182 | allow system_server gps_device:chr_file rw_file_perms; |
| 183 | allow system_server gps_control:file rw_file_perms; |
| 184 | |
| 185 | # Allow system_server to use app-created sockets. |
| 186 | allow system_server appdomain:{ tcp_socket udp_socket } { setopt read write }; |
| 187 | |
| 188 | # Allow abstract socket connection |
| 189 | allow system_server rild:unix_stream_socket connectto; |
| 190 | |
| 191 | # connect to vpn tunnel |
| 192 | allow system_server mtp:unix_stream_socket { connectto }; |
| 193 | |
| 194 | # BackupManagerService lets PMS create a data backup file |
| 195 | allow system_server cache_backup_file:file create_file_perms; |
| 196 | # Relabel /data/backup |
| 197 | allow system_server backup_data_file:dir { relabelto relabelfrom }; |
| 198 | # Relabel /cache/.*\.{data|restore} |
| 199 | allow system_server cache_backup_file:file { relabelto relabelfrom }; |
| 200 | # LocalTransport creates and relabels /cache/backup |
| 201 | allow system_server cache_backup_file:dir { relabelto relabelfrom create_dir_perms }; |
| 202 | |
| 203 | # Allow system to talk to usb device |
| 204 | allow system_server usb_device:chr_file rw_file_perms; |
| 205 | allow system_server usb_device:dir r_dir_perms; |
| 206 | |
| 207 | # Allow system to talk to sensors |
| 208 | allow system_server sensors_device:chr_file rw_file_perms; |
| 209 | |
Alex Klyubin | 8d68831 | 2013-10-03 13:35:56 -0700 | [diff] [blame] | 210 | # Read from HW RNG (needed by EntropyMixer). |
| 211 | allow system_server hw_random_device:chr_file r_file_perms; |
| 212 | |
William Roberts | ec7d39b | 2013-09-28 18:46:21 -0400 | [diff] [blame] | 213 | # Access to wake locks |
| 214 | allow system_server sysfs_wake_lock:file rw_file_perms; |