1# mediaserver - multimedia daemon
2type mediaserver, domain;
3type mediaserver_exec, system_file_type, exec_type, file_type;
4type mediaserver_tmpfs, file_type;
5
6typeattribute mediaserver mlstrustedsubject;
7
8net_domain(mediaserver)
9
10r_dir_file(mediaserver, sdcard_type)
11r_dir_file(mediaserver, cgroup)
12
13# stat /proc/self
14allow mediaserver proc:lnk_file getattr;
15
16# open /vendor/lib/mediadrm
17allow mediaserver system_file:dir r_dir_perms;
18
19userdebug_or_eng(`
20  # ptrace to processes in the same domain for memory leak detection
21  allow mediaserver self:process ptrace;
22')
23
24binder_use(mediaserver)
25binder_call(mediaserver, binderservicedomain)
26binder_call(mediaserver, appdomain)
27binder_service(mediaserver)
28
29allow mediaserver media_data_file:dir create_dir_perms;
30allow mediaserver media_data_file:file create_file_perms;
31allow mediaserver { app_data_file privapp_data_file }:file { append getattr ioctl lock map read write };
32allow mediaserver sdcard_type:file write;
33allow mediaserver gpu_device:chr_file rw_file_perms;
34allow mediaserver video_device:dir r_dir_perms;
35allow mediaserver video_device:chr_file rw_file_perms;
36
37set_prop(mediaserver, audio_prop)
38
39# Read resources from open apk files passed over Binder.
40allow mediaserver apk_data_file:file { read getattr };
41allow mediaserver asec_apk_file:file { read getattr };
42allow mediaserver ringtone_file:file { read getattr };
43
44# Read /data/data/com.android.providers.telephony files passed over Binder.
45allow mediaserver radio_data_file:file { read getattr };
46
47# Use pipes passed over Binder from app domains.
48allow mediaserver appdomain:fifo_file { getattr read write };
49
50allow mediaserver rpmsg_device:chr_file rw_file_perms;
51
52# Inter System processes communicate over named pipe (FIFO)
53allow mediaserver system_server:fifo_file r_file_perms;
54
55r_dir_file(mediaserver, media_rw_data_file)
56
57# Grant access to read files on appfuse.
58allow mediaserver app_fuse_file:file { read getattr };
59
60# Needed on some devices for playing DRM protected content,
61# but seems expected and appropriate for all devices.
62unix_socket_connect(mediaserver, drmserver, drmserver)
63
64# Needed on some devices for playing audio on paired BT device,
65# but seems appropriate for all devices.
66unix_socket_connect(mediaserver, bluetooth, bluetooth)
67
68add_service(mediaserver, mediaserver_service)
69allow mediaserver activity_service:service_manager find;
70allow mediaserver appops_service:service_manager find;
71allow mediaserver audio_service:service_manager find;
72allow mediaserver audioserver_service:service_manager find;
73allow mediaserver cameraserver_service:service_manager find;
74allow mediaserver batterystats_service:service_manager find;
75allow mediaserver drmserver_service:service_manager find;
76allow mediaserver mediaextractor_service:service_manager find;
77allow mediaserver mediacodec_service:service_manager find;
78allow mediaserver mediametrics_service:service_manager find;
79allow mediaserver media_session_service:service_manager find;
80allow mediaserver permission_service:service_manager find;
81allow mediaserver power_service:service_manager find;
82allow mediaserver processinfo_service:service_manager find;
83allow mediaserver scheduling_policy_service:service_manager find;
84allow mediaserver surfaceflinger_service:service_manager find;
85
86# for ModDrm/MediaPlayer
87allow mediaserver mediadrmserver_service:service_manager find;
88
89# For hybrid interfaces
90allow mediaserver hidl_token_hwservice:hwservice_manager find;
91
92# /oem access
93allow mediaserver oemfs:dir search;
94allow mediaserver oemfs:file r_file_perms;
95
96# /vendor apk access
97allow mediaserver vendor_app_file:file { read map getattr };
98
99use_drmservice(mediaserver)
100allow mediaserver drmserver:drmservice {
101    consumeRights
102    setPlaybackStatus
103    openDecryptSession
104    closeDecryptSession
105    initializeDecryptUnit
106    decrypt
107    finalizeDecryptUnit
108    pread
109};
110
111# only allow unprivileged socket ioctl commands
112allowxperm mediaserver self:{ rawip_socket tcp_socket udp_socket }
113  ioctl { unpriv_sock_ioctls unpriv_tty_ioctls };
114
115# Access to /data/media.
116# This should be removed if sdcardfs is modified to alter the secontext for its
117# accesses to the underlying FS.
118allow mediaserver media_rw_data_file:dir create_dir_perms;
119allow mediaserver media_rw_data_file:file create_file_perms;
120
121# Access to media in /data/preloads
122allow mediaserver preloads_media_file:file { getattr read ioctl };
123
124allow mediaserver ion_device:chr_file r_file_perms;
125allow mediaserver hal_graphics_allocator:fd use;
126allow mediaserver hal_graphics_composer:fd use;
127allow mediaserver hal_camera:fd use;
128
129allow mediaserver system_server:fd use;
130
131# b/120491318 allow mediaserver to access void:fd
132allow mediaserver vold:fd use;
133
134hal_client_domain(mediaserver, hal_allocator)
135
136###
137### neverallow rules
138###
139
140# mediaserver should never execute any executable without a
141# domain transition
142neverallow mediaserver { file_type fs_type }:file execute_no_trans;
143
144# do not allow privileged socket ioctl commands
145neverallowxperm mediaserver domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
146