149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# audioserver - audio services daemon 249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaletypeattribute audioserver coredomain; 449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaletype audioserver_exec, exec_type, file_type; 649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleinit_daemon_domain(audioserver) 749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaler_dir_file(audioserver, sdcard_type) 949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 1049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalebinder_use(audioserver) 1149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalebinder_call(audioserver, binderservicedomain) 1249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalebinder_call(audioserver, appdomain) 1349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalebinder_service(audioserver) 1449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 1549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalehal_client_domain(audioserver, hal_allocator) 1649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# /system/lib64/hw for always-passthrough Allocator HAL ashmem / mapper .so 1749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaler_dir_file(audioserver, system_file) 1849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 1949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalehal_client_domain(audioserver, hal_audio) 2049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 2149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleuserdebug_or_eng(` 2249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale # used for TEE sink - pcm capture for debug. 2349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale allow audioserver media_data_file:dir create_dir_perms; 2449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale allow audioserver audioserver_data_file:dir create_dir_perms; 2549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale allow audioserver audioserver_data_file:file create_file_perms; 2649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 2749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale # ptrace to processes in the same domain for memory leak detection 2849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale allow audioserver self:process ptrace; 2949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale') 3049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 3149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleadd_service(audioserver, audioserver_service) 3249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver activity_service:service_manager find; 3349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver appops_service:service_manager find; 3449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver batterystats_service:service_manager find; 3549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver permission_service:service_manager find; 3649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver power_service:service_manager find; 3749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver scheduling_policy_service:service_manager find; 382306cc040a5291c04e6dfce250f6ead2c9d0ef08Ray Essickallow audioserver mediametrics_service:service_manager find; 3949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 4049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# Allow read/write access to bluetooth-specific properties 4149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleset_prop(audioserver, bluetooth_a2dp_offload_prop) 4249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleset_prop(audioserver, bluetooth_prop) 4349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleset_prop(audioserver, exported_bluetooth_prop) 4449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 4549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# Grant access to audio files to audioserver 4649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver audio_data_file:dir ra_dir_perms; 4749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver audio_data_file:file create_file_perms; 4849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 4949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# allow access to ALSA MMAP FDs for AAudio API 5049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver audio_device:chr_file { read write }; 5149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 5249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalenot_full_treble(`allow audioserver audio_device:dir r_dir_perms;') 5349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwalenot_full_treble(`allow audioserver audio_device:chr_file rw_file_perms;') 5449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 5549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# For A2DP bridge which is loaded directly into audioserver 5649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleunix_socket_connect(audioserver, bluetooth, bluetooth) 5749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 5849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# Allow shell commands from ADB and shell for CTS testing/dumping 5949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver adbd:fd use; 6049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver adbd:unix_stream_socket { read write }; 6149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleallow audioserver shell:fifo_file { read write }; 6249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 6349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# Allow shell commands from ADB for CTS testing/dumping 6449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleuserdebug_or_eng(` 6549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale allow audioserver su:fd use; 6649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale allow audioserver su:fifo_file { read write }; 6749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale allow audioserver su:unix_stream_socket { read write }; 6849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale') 6949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 7049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale### 7149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale### neverallow rules 7249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale### 7349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 7449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# audioserver should never execute any executable without a 7549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# domain transition 7649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleneverallow audioserver { file_type fs_type }:file execute_no_trans; 7749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale 7849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# The goal of the mediaserver split is to place media processing code into 7949b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# restrictive sandboxes with limited responsibilities and thus limited 8049b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# permissions. Example: Audioserver is only responsible for controlling audio 8149b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# hardware and processing audio content. Cameraserver does the same for camera 8249b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# hardware/content. Etc. 8349b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# 8449b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# Media processing code is inherently risky and thus should have limited 8549b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# permissions and be isolated from the rest of the system and network. 8649b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# Lengthier explanation here: 8749b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwale# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html 8849b79029cbb4bfb362b6b823e63bb467e8012230Wale Ogunwaleneverallow audioserver domain:{ tcp_socket udp_socket rawip_socket } *; 89