platform_system_sepolicy/private/property.te

# Properties used only in /system
system_internal_prop(adbd_prop)
system_internal_prop(ctl_snapuserd_prop)
system_internal_prop(device_config_profcollect_native_boot_prop)
system_internal_prop(device_config_statsd_native_prop)
system_internal_prop(device_config_statsd_native_boot_prop)
system_internal_prop(device_config_storage_native_boot_prop)
system_internal_prop(device_config_sys_traced_prop)
system_internal_prop(device_config_window_manager_native_boot_prop)
system_internal_prop(device_config_configuration_prop)
system_internal_prop(device_config_connectivity_prop)
system_internal_prop(device_config_swcodec_native_prop)
system_internal_prop(fastbootd_protocol_prop)
system_internal_prop(gsid_prop)
system_internal_prop(init_perf_lsm_hooks_prop)
system_internal_prop(init_service_status_private_prop)
system_internal_prop(init_svc_debug_prop)
system_internal_prop(keystore_listen_prop)
system_internal_prop(last_boot_reason_prop)
system_internal_prop(localization_prop)
system_internal_prop(lower_kptr_restrict_prop)
system_internal_prop(net_464xlat_fromvendor_prop)
system_internal_prop(net_connectivity_prop)
system_internal_prop(netd_stable_secret_prop)
system_internal_prop(odsign_prop)
system_internal_prop(perf_drop_caches_prop)
system_internal_prop(pm_prop)
system_internal_prop(profcollectd_node_id_prop)
system_internal_prop(rollback_test_prop)
system_internal_prop(setupwizard_prop)
system_internal_prop(system_adbd_prop)
system_internal_prop(traced_perf_enabled_prop)
system_internal_prop(userspace_reboot_log_prop)
system_internal_prop(userspace_reboot_test_prop)
system_internal_prop(verity_status_prop)
system_internal_prop(zygote_wrap_prop)

###
### Neverallow rules
###

treble_sysprop_neverallow(`

enforce_sysprop_owner(`
  neverallow domain {
    property_type
    -system_property_type
    -product_property_type
    -vendor_property_type
  }:file no_rw_file_perms;
')

neverallow { domain -coredomain } {
  system_property_type
  system_internal_property_type
  -system_restricted_property_type
  -system_public_property_type
}:file no_rw_file_perms;

neverallow { domain -coredomain } {
  system_property_type
  -system_public_property_type
}:property_service set;

# init is in coredomain, but should be able to read/write all props.
# dumpstate is also in coredomain, but should be able to read all props.
neverallow { coredomain -init -dumpstate } {
  vendor_property_type
  vendor_internal_property_type
  -vendor_restricted_property_type
  -vendor_public_property_type
}:file no_rw_file_perms;

neverallow { coredomain -init } {
  vendor_property_type
  -vendor_public_property_type
}:property_service set;

')

# There is no need to perform ioctl or advisory locking operations on
# property files. If this neverallow is being triggered, it is
# likely that the policy is using r_file_perms directly instead of
# the get_prop() macro.
neverallow domain property_type:file { ioctl lock };

neverallow * {
  core_property_type
  -audio_prop
  -config_prop
  -cppreopt_prop
  -dalvik_prop
  -debuggerd_prop
  -debug_prop
  -dhcp_prop
  -dumpstate_prop
  -fingerprint_prop
  -logd_prop
  -net_radio_prop
  -nfc_prop
  -ota_prop
  -pan_result_prop
  -persist_debug_prop
  -powerctl_prop
  -radio_prop
  -restorecon_prop
  -shell_prop
  -system_prop
  -usb_prop
  -vold_prop
}:file no_rw_file_perms;

# sigstop property is only used for debugging; should only be set by su which is permissive
# for userdebug/eng
neverallow {
  domain
  -init
  -vendor_init
} ctl_sigstop_prop:property_service set;

# Don't audit legacy ctl. property handling.  We only want the newer permission check to appear
# in the audit log
dontaudit domain {
  ctl_bootanim_prop
  ctl_bugreport_prop
  ctl_console_prop
  ctl_default_prop
  ctl_dumpstate_prop
  ctl_fuse_prop
  ctl_mdnsd_prop
  ctl_rildaemon_prop
}:property_service set;

neverallow {
  domain
  -init
} init_svc_debug_prop:property_service set;

neverallow {
  domain
  -init
  -dumpstate
  userdebug_or_eng(`-su')
} init_svc_debug_prop:file no_rw_file_perms;

compatible_property_only(`
# Prevent properties from being set
  neverallow {
    domain
    -coredomain
    -appdomain
    -vendor_init
  } {
    core_property_type
    extended_core_property_type
    exported_config_prop
    exported_default_prop
    exported_dumpstate_prop
    exported_system_prop
    exported3_system_prop
    usb_control_prop
    -nfc_prop
    -powerctl_prop
    -radio_prop
  }:property_service set;

  neverallow {
    domain
    -coredomain
    -appdomain
    -hal_nfc_server
  } {
    nfc_prop
  }:property_service set;

  neverallow {
    domain
    -coredomain
    -appdomain
    -hal_telephony_server
    -vendor_init
  } {
    radio_control_prop
  }:property_service set;

  neverallow {
    domain
    -coredomain
    -appdomain
    -hal_telephony_server
  } {
    radio_prop
  }:property_service set;

  neverallow {
    domain
    -coredomain
    -bluetooth
    -hal_bluetooth_server
  } {
    bluetooth_prop
  }:property_service set;

  neverallow {
    domain
    -coredomain
    -bluetooth
    -hal_bluetooth_server
    -vendor_init
  } {
    exported_bluetooth_prop
  }:property_service set;

  neverallow {
    domain
    -coredomain
    -hal_camera_server
    -cameraserver
    -vendor_init
  } {
    exported_camera_prop
  }:property_service set;

  neverallow {
    domain
    -coredomain
    -hal_wifi_server
    -wificond
  } {
    wifi_prop
  }:property_service set;

  neverallow {
    domain
    -init
    -dumpstate
    -hal_wifi_server
    -wificond
    -vendor_init
  } {
    wifi_hal_prop
  }:property_service set;

# Prevent properties from being read
  neverallow {
    domain
    -coredomain
    -appdomain
    -vendor_init
  } {
    core_property_type
    dalvik_config_prop
    extended_core_property_type
    exported3_system_prop
    systemsound_config_prop
    -debug_prop
    -logd_prop
    -nfc_prop
    -powerctl_prop
    -radio_prop
  }:file no_rw_file_perms;

  neverallow {
    domain
    -coredomain
    -appdomain
    -hal_nfc_server
  } {
    nfc_prop
  }:file no_rw_file_perms;

  neverallow {
    domain
    -coredomain
    -appdomain
    -hal_telephony_server
  } {
    radio_prop
  }:file no_rw_file_perms;

  neverallow {
    domain
    -coredomain
    -bluetooth
    -hal_bluetooth_server
  } {
    bluetooth_prop
  }:file no_rw_file_perms;

  neverallow {
    domain
    -coredomain
    -hal_wifi_server
    -wificond
  } {
    wifi_prop
  }:file no_rw_file_perms;

  neverallow {
    domain
    -coredomain
    -vendor_init
  } {
    suspend_prop
  }:property_service set;
')

compatible_property_only(`
  # Neverallow coredomain to set vendor properties
  neverallow {
    coredomain
    -init
    -system_writes_vendor_properties_violators
  } {
    property_type
    -system_property_type
    -extended_core_property_type
  }:property_service set;
')

neverallow {
  domain
  -coredomain
  -vendor_init
} {
  ffs_config_prop
  ffs_control_prop
}:file no_rw_file_perms;

neverallow {
  domain
  -init
  -system_server
} {
  userspace_reboot_log_prop
}:property_service set;

neverallow {
  # Only allow init and system_server to set system_adbd_prop
  domain
  -init
  -system_server
} {
  system_adbd_prop
}:property_service set;

# Let (vendor_)init, adbd, and system_server set service.adb.tcp.port
neverallow {
  domain
  -init
  -vendor_init
  -adbd
  -system_server
} {
  adbd_config_prop
}:property_service set;

neverallow {
  # Only allow init and adbd to set adbd_prop
  domain
  -init
  -adbd
} {
  adbd_prop
}:property_service set;

neverallow {
  # Only allow init and shell to set userspace_reboot_test_prop
  domain
  -init
  -shell
} {
  userspace_reboot_test_prop
}:property_service set;

neverallow {
  domain
  -init
  -system_server
  -vendor_init
} {
  surfaceflinger_color_prop
}:property_service set;

neverallow {
  domain
  -init
} {
  libc_debug_prop
}:property_service set;

# Allow the shell to set MTE props, so that non-root users with adb shell
# access can control the settings on their device.
neverallow {
  domain
  -init
  -shell
} {
  arm64_memtag_prop
}:property_service set;

neverallow {
  domain
  -init
  -system_server
  -vendor_init
} zram_control_prop:property_service set;

neverallow {
  domain
  -init
  -system_server
  -vendor_init
} dalvik_runtime_prop:property_service set;

neverallow {
  domain
  -coredomain
  -vendor_init
} {
  usb_config_prop
  usb_control_prop
}:property_service set;

neverallow {
  domain
  -init
  -system_server
} {
  provisioned_prop
  retaildemo_prop
}:property_service set;

neverallow {
  domain
  -coredomain
  -vendor_init
} {
  provisioned_prop
  retaildemo_prop
}:file no_rw_file_perms;

neverallow {
  domain
  -init
} {
  init_service_status_private_prop
  init_service_status_prop
}:property_service set;

neverallow {
  domain
  -init
  -radio
  -appdomain
  -hal_telephony_server
  not_compatible_property(`-vendor_init')
} telephony_status_prop:property_service set;

neverallow {
  domain
  -init
  -vendor_init
} {
  graphics_config_prop
}:property_service set;

neverallow {
  domain
  -init
  -surfaceflinger
} {
  surfaceflinger_display_prop
}:property_service set;

neverallow {
  domain
  -coredomain
  -appdomain
  -vendor_init
} packagemanager_config_prop:file no_rw_file_perms;

neverallow {
  domain
  -coredomain
  -vendor_init
} keyguard_config_prop:file no_rw_file_perms;

neverallow {
  domain
  -init
} {
  localization_prop
}:property_service set;

neverallow {
  domain
  -init
  -vendor_init
  -dumpstate
  -system_app
} oem_unlock_prop:file no_rw_file_perms;

neverallow {
  domain
  -coredomain
  -vendor_init
} storagemanager_config_prop:file no_rw_file_perms;

neverallow {
  domain
  -init
  -vendor_init
  -dumpstate
  -appdomain
} sendbug_config_prop:file no_rw_file_perms;

neverallow {
  domain
  -init
  -vendor_init
  -dumpstate
  -appdomain
} camera_calibration_prop:file no_rw_file_perms;

neverallow {
  domain
  -init
  -dumpstate
  -hal_dumpstate_server
  not_compatible_property(`-vendor_init')
} hal_dumpstate_config_prop:file no_rw_file_perms;

neverallow {
  domain
  -init
  userdebug_or_eng(`-profcollectd')
  userdebug_or_eng(`-traced_probes')
  userdebug_or_eng(`-traced_perf')
} {
  lower_kptr_restrict_prop
}:property_service set;

neverallow {
  domain
  -init
} zygote_wrap_prop:property_service set;

neverallow {
  domain
  -init
} verity_status_prop:property_service set;

neverallow {
  domain
  -init
} setupwizard_prop:property_service set;

# ro.product.property_source_order is useless after initialization of ro.product.* props.
# So making it accessible only from init and vendor_init.
neverallow {
  domain
  -init
  -dumpstate
  -vendor_init
} build_config_prop:file no_rw_file_perms;

neverallow {
  domain
  -init
  -shell
} sqlite_log_prop:property_service set;

neverallow {
  domain
  -coredomain
  -appdomain
} sqlite_log_prop:file no_rw_file_perms;

neverallow {
  domain
  -init
} default_prop:property_service set;

# Only one of system_property_type and vendor_property_type can be assigned.
# Property types having both attributes won't be accessible from anywhere.
neverallow domain system_and_vendor_property_type:{file property_service} *;

neverallow {
  # Only allow init and shell to set rollback_test_prop
  domain
  -init
  -shell
} rollback_test_prop:property_service set;

neverallow {
  # Only allow init and profcollectd to access profcollectd_node_id_prop
  domain
  -init
  -dumpstate
  -profcollectd
} profcollectd_node_id_prop:file r_file_perms;