1# surfaceflinger - display compositor service
2type surfaceflinger, domain;
3type surfaceflinger_exec, exec_type, file_type;
4
5init_daemon_domain(surfaceflinger)
6typeattribute surfaceflinger mlstrustedsubject;
7
8# Talk to init over the property socket.
9unix_socket_connect(surfaceflinger, property, init)
10
11# Perform Binder IPC.
12binder_use(surfaceflinger)
13binder_call(surfaceflinger, binderservicedomain)
14binder_call(surfaceflinger, appdomain)
15binder_call(surfaceflinger, bootanim)
16binder_service(surfaceflinger)
17
18# Binder IPC to bu, presently runs in adbd domain.
19binder_call(surfaceflinger, adbd)
20
21# Read /proc/pid files for Binder clients.
22r_dir_file(surfaceflinger, binderservicedomain)
23r_dir_file(surfaceflinger, appdomain)
24
25# Access the GPU.
26allow surfaceflinger gpu_device:chr_file rw_file_perms;
27
28# Access /dev/graphics/fb0.
29allow surfaceflinger graphics_device:dir search;
30allow surfaceflinger graphics_device:chr_file rw_file_perms;
31
32# Access /dev/video1.
33allow surfaceflinger video_device:dir r_dir_perms;
34allow surfaceflinger video_device:chr_file rw_file_perms;
35
36# Create and use netlink kobject uevent sockets.
37allow surfaceflinger self:netlink_kobject_uevent_socket create_socket_perms;
38
39# Set properties.
40allow surfaceflinger system_prop:property_service set;
41allow surfaceflinger ctl_bootanim_prop:property_service set;
42
43# Use open files supplied by an app.
44allow surfaceflinger appdomain:fd use;
45allow surfaceflinger app_data_file:file { read write };
46
47# Use open file provided by bootanim.
48allow surfaceflinger bootanim:fd use;
49
50# Allow a dumpstate triggered screenshot
51binder_call(surfaceflinger, dumpstate)
52binder_call(surfaceflinger, shell)
53r_dir_file(surfaceflinger, dumpstate)
54
55# Needed on some devices for playing DRM protected content,
56# but seems expected and appropriate for all devices.
57allow surfaceflinger tee:unix_stream_socket connectto;
58allow surfaceflinger tee_device:chr_file rw_file_perms;
59
60allow surfaceflinger surfaceflinger_service:service_manager add;
61
62###
63### Neverallow rules
64###
65### surfaceflinger should NEVER do any of this
66
67# Do not allow accessing SDcard files as unsafe ejection could
68# cause the kernel to kill the process.
69neverallow surfaceflinger sdcard_type:file rw_file_perms;
70