606d2fd665
Introduce the add_service() macro which wraps up add/find
permissions for the source domain with a neverallow preventing
others from adding it. Only a particular domain should
add a particular service.
Use the add_service() macro to automatically add a neverallow
that prevents other domains from adding the service.
mediadrmserver was adding services labeled mediaserver_service.
Drop the add permission as it should just need the find
permission.
Additionally, the macro adds the { add find } permission which
causes some existing neverallow's to assert. Adjust those
neverallow's so "self" can always find.
Test: compile and run on hikey and emulator. No new denials were
found, and all services, where applicable, seem to be running OK.
Change-Id: Ibbd2a5304edd5f8b877bc86852b0694732be993c
Signed-off-by: William Roberts <william.c.roberts@intel.com>
58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
# audioserver - audio services daemon
|
|
type audioserver, domain;
|
|
type audioserver_exec, exec_type, file_type;
|
|
|
|
r_dir_file(audioserver, sdcard_type)
|
|
|
|
binder_use(audioserver)
|
|
binder_call(audioserver, binderservicedomain)
|
|
binder_call(audioserver, appdomain)
|
|
binder_service(audioserver)
|
|
|
|
hwbinder_use(audioserver)
|
|
binder_call(audioserver, hal_audio)
|
|
hwallocator_use(audioserver)
|
|
|
|
r_dir_file(audioserver, proc)
|
|
allow audioserver ion_device:chr_file r_file_perms;
|
|
allow audioserver system_file:dir r_dir_perms;
|
|
|
|
userdebug_or_eng(`
|
|
# used for TEE sink - pcm capture for debug.
|
|
allow audioserver media_data_file:dir create_dir_perms;
|
|
allow audioserver audioserver_data_file:dir create_dir_perms;
|
|
allow audioserver audioserver_data_file:file create_file_perms;
|
|
|
|
# ptrace to processes in the same domain for memory leak detection
|
|
allow audioserver self:process ptrace;
|
|
')
|
|
|
|
allow audioserver audio_device:dir r_dir_perms;
|
|
allow audioserver audio_device:chr_file rw_file_perms;
|
|
|
|
add_service(audioserver, audioserver_service)
|
|
allow audioserver appops_service:service_manager find;
|
|
allow audioserver batterystats_service:service_manager find;
|
|
allow audioserver permission_service:service_manager find;
|
|
allow audioserver power_service:service_manager find;
|
|
allow audioserver scheduling_policy_service:service_manager find;
|
|
|
|
# Grant access to audio files to audioserver
|
|
allow audioserver audio_data_file:dir ra_dir_perms;
|
|
allow audioserver audio_data_file:file create_file_perms;
|
|
|
|
# Needed on some devices for playing audio on paired BT device,
|
|
# but seems appropriate for all devices.
|
|
unix_socket_connect(audioserver, bluetooth, bluetooth)
|
|
|
|
###
|
|
### neverallow rules
|
|
###
|
|
|
|
# audioserver should never execute any executable without a
|
|
# domain transition
|
|
neverallow audioserver { file_type fs_type }:file execute_no_trans;
|
|
|
|
# audioserver should never need network access. Disallow network sockets.
|
|
neverallow audioserver domain:{ tcp_socket udp_socket rawip_socket } *;
|