private/platform_app.te

###
### Apps signed with the platform key.
###

typeattribute platform_app coredomain;

app_domain(platform_app)

# Access the network.
net_domain(platform_app)
# Access bluetooth.
bluetooth_domain(platform_app)
# Read from /data/local/tmp or /data/data/com.android.shell.
allow platform_app shell_data_file:dir search;
allow platform_app shell_data_file:file { open getattr read };
allow platform_app icon_file:file { open getattr read };
# Populate /data/app/vmdl*.tmp, /data/app-private/vmdl*.tmp files
# created by system server.
allow platform_app { apk_tmp_file apk_private_tmp_file }:dir rw_dir_perms;
allow platform_app { apk_tmp_file apk_private_tmp_file }:file rw_file_perms;
allow platform_app apk_private_data_file:dir search;
# ASEC
allow platform_app asec_apk_file:dir create_dir_perms;
allow platform_app asec_apk_file:file create_file_perms;

# Access to /data/media.
allow platform_app media_rw_data_file:dir create_dir_perms;
allow platform_app media_rw_data_file:file create_file_perms;

# Write to /cache.
allow platform_app cache_file:dir create_dir_perms;
allow platform_app cache_file:file create_file_perms;

# Direct access to vold-mounted storage under /mnt/media_rw
# This is a performance optimization that allows platform apps to bypass the FUSE layer
allow platform_app mnt_media_rw_file:dir r_dir_perms;
allow platform_app sdcard_type:dir create_dir_perms;
allow platform_app sdcard_type:file create_file_perms;

# com.android.systemui
allow platform_app rootfs:dir getattr;
get_prop(platform_app, radio_cdma_ecm_prop)
userdebug_or_eng(`
  set_prop(platform_app, persist_wm_debug_prop)
')
neverallow { domain -init -dumpstate -system_server userdebug_or_eng(`-domain') } persist_wm_debug_prop:property_service set;

userdebug_or_eng(`
  set_prop(platform_app, persist_sysui_builder_extras_prop)
')
userdebug_or_eng(`
  set_prop(platform_app, persist_sysui_ranking_update_prop)
')
set_prop(platform_app, debug_tracing_desktop_mode_visible_tasks_prop)

# com.android.captiveportallogin reads /proc/vmstat
allow platform_app {
  proc_vmstat
}:file r_file_perms;

# /proc/net access.
# TODO(b/9496886) Audit access for removal.
r_dir_file(platform_app, proc_net_type)
userdebug_or_eng(`
  auditallow platform_app proc_net_type:{ dir file lnk_file } { getattr open read };
')

# Allow sharing traces to betterbug from /data/misc/wmtrace.
userdebug_or_eng(`
  allow platform_app trace_data_file:file create_file_perms;
  allow platform_app trace_data_file:dir rw_dir_perms;
')

# Allow writing and removing wmshell protolog in /data/misc/wmtrace.
userdebug_or_eng(`
  allow platform_app wm_trace_data_file:dir rw_dir_perms;
  allow platform_app wm_trace_data_file:file { getattr setattr create unlink rw_file_perms };
')


# To exec the perfetto cmdline client and pass it the trace config on
# stdint through a pipe. Allow to access traced's privileged consumer socket.
userdebug_or_eng(`
  allow platform_app perfetto_exec:file rx_file_perms;
  unix_socket_connect(platform_app, traced_consumer, traced);
')

allow platform_app audioserver_service:service_manager find;
allow platform_app cameraserver_service:service_manager find;
allow platform_app drmserver_service:service_manager find;
allow platform_app mediaserver_service:service_manager find;
allow platform_app mediametrics_service:service_manager find;
allow platform_app mediaextractor_service:service_manager find;
allow platform_app mediadrmserver_service:service_manager find;
allow platform_app persistent_data_block_service:service_manager find;
allow platform_app radio_service:service_manager find;
allow platform_app thermal_service:service_manager find;
allow platform_app app_api_service:service_manager find;
allow platform_app system_api_service:service_manager find;
allow platform_app vr_manager_service:service_manager find;
allow platform_app stats_service:service_manager find;
allow platform_app tradeinmode_service:service_manager find;

# Allow platform apps to log via statsd.
binder_call(platform_app, statsd)

# Allow platform applications to find and call artd for testing
userdebug_or_eng(`
  allow platform_app artd_service:service_manager find;
  binder_call(platform_app, artd)
')

# Access to /data/preloads
allow platform_app preloads_data_file:file r_file_perms;
allow platform_app preloads_data_file:dir r_dir_perms;
allow platform_app preloads_media_file:file r_file_perms;
allow platform_app preloads_media_file:dir r_dir_perms;

read_runtime_log_tags(platform_app)

# allow platform apps to use UDP sockets provided by the system server but not
# modify them other than to connect
allow platform_app system_server:udp_socket {
        connect getattr read recvfrom sendto write getopt setopt };

# allow platform apps to connect to the property service
set_prop(platform_app, test_boot_reason_prop)

# allow platform apps to read keyguard.no_require_sim
get_prop(platform_app, keyguard_config_prop)

# allow platform apps to read qemu.hw.mainkeys
get_prop(platform_app, qemu_hw_prop)

# allow platform apps to read sys.boot.reason.last
get_prop(platform_app, last_boot_reason_prop)

# allow platform apps to create symbolic link
allow platform_app app_data_file:lnk_file create_file_perms;

# suppress denials caused by debugfs_tracing
dontaudit platform_app debugfs_tracing:file rw_file_perms;

# Allow platform apps to create VMs
virtualizationservice_use(platform_app)

###
### Neverallow rules
###

neverallow { domain -init userdebug_or_eng(`-shell -platform_app') } persist_sysui_builder_extras_prop:property_service set;

# app domains which access /dev/fuse should not run as platform_app
neverallow platform_app fuse_device:chr_file *;