1# Domain for shell processes spawned by ADB or console service. 2type shell, domain, mlstrustedsubject; 3type shell_exec, system_file_type, exec_type, file_type; 4 5# Create and use network sockets. 6net_domain(shell) 7 8# logcat 9read_logd(shell) 10control_logd(shell) 11# logcat -L (directly, or via dumpstate) 12allow shell pstorefs:dir search; 13allow shell pstorefs:file r_file_perms; 14 15# Root fs. 16allow shell rootfs:dir r_dir_perms; 17 18# read files in /data/anr 19allow shell anr_data_file:dir r_dir_perms; 20allow shell anr_data_file:file r_file_perms; 21 22# Access /data/local/tmp. 23allow shell shell_data_file:dir create_dir_perms; 24allow shell shell_data_file:file create_file_perms; 25allow shell shell_data_file:file rx_file_perms; 26allow shell shell_data_file:lnk_file create_file_perms; 27 28# Read and delete from /data/local/traces. 29allow shell trace_data_file:file { r_file_perms unlink }; 30allow shell trace_data_file:dir { r_dir_perms remove_name write }; 31 32# Access /data/misc/profman. 33allow shell profman_dump_data_file:dir { write remove_name r_dir_perms }; 34allow shell profman_dump_data_file:file { unlink r_file_perms }; 35 36# Read/execute files in /data/nativetest 37userdebug_or_eng(` 38 allow shell nativetest_data_file:dir r_dir_perms; 39 allow shell nativetest_data_file:file rx_file_perms; 40') 41 42# adb bugreport 43unix_socket_connect(shell, dumpstate, dumpstate) 44 45allow shell devpts:chr_file rw_file_perms; 46allow shell tty_device:chr_file rw_file_perms; 47allow shell console_device:chr_file rw_file_perms; 48 49allow shell input_device:dir r_dir_perms; 50allow shell input_device:chr_file r_file_perms; 51 52r_dir_file(shell, system_file) 53allow shell system_file:file x_file_perms; 54allow shell toolbox_exec:file rx_file_perms; 55allow shell tzdatacheck_exec:file rx_file_perms; 56allow shell shell_exec:file rx_file_perms; 57allow shell zygote_exec:file rx_file_perms; 58 59r_dir_file(shell, apk_data_file) 60 61# Set properties. 62set_prop(shell, shell_prop) 63set_prop(shell, ctl_bugreport_prop) 64set_prop(shell, ctl_dumpstate_prop) 65set_prop(shell, dumpstate_prop) 66set_prop(shell, exported_dumpstate_prop) 67set_prop(shell, debug_prop) 68set_prop(shell, powerctl_prop) 69set_prop(shell, log_tag_prop) 70set_prop(shell, wifi_log_prop) 71# Allow shell to start/stop traced via the persist.traced.enable 72# property (which also takes care of /data/misc initialization). 73set_prop(shell, traced_enabled_prop) 74# adjust is_loggable properties 75userdebug_or_eng(`set_prop(shell, log_prop)') 76# logpersist script 77userdebug_or_eng(`set_prop(shell, logpersistd_logging_prop)') 78# Allow shell to start/stop heapprofd via the persist.heapprofd.enable 79# property. 80set_prop(shell, heapprofd_enabled_prop) 81# Allow shell to start/stop gsid via ctl.start|stop|restart gsid. 82set_prop(shell, ctl_gsid_prop) 83# Allow shell to enable Dynamic System Update 84set_prop(shell, dynamic_system_prop) 85 86userdebug_or_eng(` 87 # "systrace --boot" support - allow boottrace service to run 88 allow shell boottrace_data_file:dir rw_dir_perms; 89 allow shell boottrace_data_file:file create_file_perms; 90 set_prop(shell, persist_debug_prop) 91') 92 93# Read device's serial number from system properties 94get_prop(shell, serialno_prop) 95 96# Allow shell to read the vendor security patch level for CTS 97get_prop(shell, vendor_security_patch_level_prop) 98 99# Read state of logging-related properties 100get_prop(shell, device_logging_prop) 101 102# Read state of boot reason properties 103get_prop(shell, bootloader_boot_reason_prop) 104get_prop(shell, last_boot_reason_prop) 105get_prop(shell, system_boot_reason_prop) 106 107# allow shell access to services 108allow shell servicemanager:service_manager list; 109# don't allow shell to access GateKeeper service 110# TODO: why is this so broad? Tightening candidate? It needs at list: 111# - dumpstate_service (so it can receive dumpstate progress updates) 112allow shell { 113 service_manager_type 114 -apex_service 115 -dnsresolver_service 116 -gatekeeper_service 117 -incident_service 118 -installd_service 119 -iorapd_service 120 -netd_service 121 -system_suspend_control_service 122 -virtual_touchpad_service 123 -vold_service 124 -vr_hwc_service 125}:service_manager find; 126allow shell dumpstate:binder call; 127 128# allow shell to get information from hwservicemanager 129# for instance, listing hardware services with lshal 130hwbinder_use(shell) 131allow shell hwservicemanager:hwservice_manager list; 132 133# allow shell to look through /proc/ for lsmod, ps, top, netstat. 134r_dir_file(shell, proc_net_type) 135 136allow shell { 137 proc_asound 138 proc_filesystems 139 proc_interrupts 140 proc_loadavg # b/124024827 141 proc_meminfo 142 proc_modules 143 proc_pid_max 144 proc_slabinfo 145 proc_stat 146 proc_timer 147 proc_uptime 148 proc_version 149 proc_zoneinfo 150}:file r_file_perms; 151 152# allow listing network interfaces under /sys/class/net. 153allow shell sysfs_net:dir r_dir_perms; 154 155r_dir_file(shell, cgroup) 156allow shell domain:dir { search open read getattr }; 157allow shell domain:{ file lnk_file } { open read getattr }; 158 159# statvfs() of /proc and other labeled filesystems 160# (yaffs2, jffs2, ext2, ext3, ext4, xfs, btrfs, f2fs, squashfs, overlay) 161allow shell { proc labeledfs }:filesystem getattr; 162 163# stat() of /dev 164allow shell device:dir getattr; 165 166# allow shell to read /proc/pid/attr/current for ps -Z 167allow shell domain:process getattr; 168 169# Allow pulling the SELinux policy for CTS purposes 170allow shell selinuxfs:dir r_dir_perms; 171allow shell selinuxfs:file r_file_perms; 172 173# enable shell domain to read/write files/dirs for bootchart data 174# User will creates the start and stop file via adb shell 175# and read other files created by init process under /data/bootchart 176allow shell bootchart_data_file:dir rw_dir_perms; 177allow shell bootchart_data_file:file create_file_perms; 178 179# Make sure strace works for the non-privileged shell user 180allow shell self:process ptrace; 181 182# allow shell to get battery info 183allow shell sysfs:dir r_dir_perms; 184allow shell sysfs_batteryinfo:dir r_dir_perms; 185allow shell sysfs_batteryinfo:file r_file_perms; 186 187# Allow access to ion memory allocation device. 188allow shell ion_device:chr_file rw_file_perms; 189 190# 191# filesystem test for insecure chr_file's is done 192# via a host side test 193# 194allow shell dev_type:dir r_dir_perms; 195allow shell dev_type:chr_file getattr; 196 197# /dev/fd is a symlink 198allow shell proc:lnk_file getattr; 199 200# 201# filesystem test for insucre blk_file's is done 202# via hostside test 203# 204allow shell dev_type:blk_file getattr; 205 206# read selinux policy files 207allow shell file_contexts_file:file r_file_perms; 208allow shell property_contexts_file:file r_file_perms; 209allow shell seapp_contexts_file:file r_file_perms; 210allow shell service_contexts_file:file r_file_perms; 211allow shell sepolicy_file:file r_file_perms; 212 213# Allow shell to start up vendor shell 214allow shell vendor_shell_exec:file rx_file_perms; 215 216# Everything is labeled as rootfs in recovery mode. Allow shell to 217# execute them. 218recovery_only(` 219 allow shell rootfs:file rx_file_perms; 220') 221 222### 223### Neverallow rules 224### 225 226# Do not allow shell to hard link to any files. 227# In particular, if shell hard links to app data 228# files, installd will not be able to guarantee the deletion 229# of the linked to file. Hard links also contribute to security 230# bugs, so we want to ensure the shell user never has this 231# capability. 232neverallow shell file_type:file link; 233 234# Do not allow privileged socket ioctl commands 235neverallowxperm shell domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls; 236 237# limit shell access to sensitive char drivers to 238# only getattr required for host side test. 239neverallow shell { 240 fuse_device 241 hw_random_device 242 port_device 243}:chr_file ~getattr; 244 245# Limit shell to only getattr on blk devices for host side tests. 246neverallow shell dev_type:blk_file ~getattr; 247 248# b/30861057: Shell access to existing input devices is an abuse 249# vector. The shell user can inject events that look like they 250# originate from the touchscreen etc. 251# Everyone should have already moved to UiAutomation#injectInputEvent 252# if they are running instrumentation tests (i.e. CTS), Monkey for 253# their stress tests, and the input command (adb shell input ...) for 254# injecting swipes and things. 255neverallow shell input_device:chr_file no_w_file_perms; 256