platform_system_sepolicy/private/update_engine.te
Pawan Wagh b071882d76 Allow system app and update_engine to read OTA from /vendor
Introuducing vendor_boot_ota_file which will be used to allow
reading OTAs from /vendor/boot_otas when BOARD_16K_OTA_MOVE_VENDOR := true
is set. These OTAs will be read from settings app(system_app) and update
engine.

Test: m, m Settings && adb install -r $ANDROID_PRODUCT_OUT/system_ext/priv-app/Settings/Settings.apk
Bug: 335022191
Change-Id: Ie42e0de12694ed74f9a98cd115f72d207f67c834
2024-05-02 01:14:47 +00:00

120 lines
4.4 KiB
Text

typeattribute update_engine coredomain;
init_daemon_domain(update_engine);
# Allow to talk to gsid.
allow update_engine gsi_service:service_manager find;
binder_call(update_engine, gsid)
# Allow to start gsid service.
set_prop(update_engine, ctl_gsid_prop)
# Allow to start snapuserd for dm-user communication.
set_prop(update_engine, ctl_snapuserd_prop)
# Allow to set the OTA related properties, e.g. ota.warm_reset.
set_prop(update_engine, ota_prop)
get_prop(update_engine, ota_build_prop)
# Allow to get the DSU status
get_prop(update_engine, gsid_prop)
# Allow update_engine to call the callback function provided by GKI update hook.
binder_call(update_engine, gki_apex_prepostinstall)
# Allow update_engine to call the callback function by settings app
# for the kernel update triggered using 16k developer option
binder_call(update_engine, system_app)
# Allow to communicate with the snapuserd service, for dm-user snapshots.
allow update_engine snapuserd:unix_stream_socket connectto;
allow update_engine snapuserd_socket:sock_file write;
get_prop(update_engine, snapuserd_prop)
# Allow to communicate with apexd for calculating and reserving space for
# capex decompression
allow update_engine apex_service:service_manager find;
binder_call(update_engine, apexd)
# let this domain use the hal service
binder_use(update_engine)
hal_client_domain(update_engine, hal_bootctl)
net_domain(update_engine);
# Following permissions are needed for update_engine.
allow update_engine self:process { setsched };
allow update_engine self:global_capability_class_set { fowner sys_admin };
# Note: fsetid checks are triggered when creating a file in a directory with
# the setgid bit set to determine if the file should inherit setgid. In this
# case, setgid on the file is undesirable so we should just suppress the
# denial.
dontaudit update_engine self:global_capability_class_set fsetid;
allow update_engine kmsg_device:chr_file { getattr w_file_perms };
allow update_engine update_engine_exec:file rx_file_perms;
wakelock_use(update_engine);
# Ignore these denials.
dontaudit update_engine kernel:process setsched;
dontaudit update_engine self:global_capability_class_set sys_rawio;
# Allow using persistent storage in /data/misc/update_engine.
allow update_engine update_engine_data_file:dir create_dir_perms;
allow update_engine update_engine_data_file:file create_file_perms;
# Allow using persistent storage in /data/misc/update_engine_log.
allow update_engine update_engine_log_data_file:dir create_dir_perms;
allow update_engine update_engine_log_data_file:file create_file_perms;
# Register the service to perform Binder IPC.
binder_use(update_engine)
add_service(update_engine, update_engine_service)
add_service(update_engine, update_engine_stable_service)
# Allow update_engine to call the callback function provided by priv_app/GMS core.
binder_call(update_engine, priv_app)
# b/142672293: No other priv-app should need this rule now that GMS core runs in its own domain.
userdebug_or_eng(`
auditallow update_engine priv_app:binder { call transfer };
auditallow priv_app update_engine:binder transfer;
auditallow update_engine priv_app:fd use;
')
binder_call(update_engine, gmscore_app)
# Allow update_engine to call the callback function provided by system_server.
binder_call(update_engine, system_server)
# Read OTA zip file at /data/ota_package/.
allow update_engine ota_package_file:file r_file_perms;
allow update_engine ota_package_file:dir r_dir_perms;
# Use Boot Control HAL
hal_client_domain(update_engine, hal_bootctl)
# access /proc/misc
allow update_engine proc_misc:file r_file_perms;
# read directories on /system and /vendor
allow update_engine system_file:dir r_dir_perms;
# Allow ReadDefaultFstab().
# update_engine tries to determine the parent path for all devices (e.g.
# /dev/block/by-name) by reading the default fstab and looking for the misc
# device.
read_fstab(update_engine)
# Allow to write to snapshotctl_log logs.
# TODO(b/148818798) revert when parent bug is fixed.
userdebug_or_eng(`
allow update_engine snapshotctl_log_data_file:dir rw_dir_perms;
allow update_engine snapshotctl_log_data_file:file create_file_perms;
')
# Allow determining filesystems available on system.
# Needed for checking if overlayfs is enabled
allow update_engine proc_filesystems:file r_file_perms;
allow update_engine vendor_boot_ota_file:dir { r_dir_perms };
allow update_engine vendor_boot_ota_file:file { r_file_perms };