1# surfaceflinger - display compositor service 2 3typeattribute surfaceflinger coredomain; 4 5type surfaceflinger_exec, exec_type, file_type; 6init_daemon_domain(surfaceflinger) 7 8typeattribute surfaceflinger mlstrustedsubject; 9typeattribute surfaceflinger display_service_server; 10 11read_runtime_log_tags(surfaceflinger) 12 13# Perform HwBinder IPC. 14hal_client_domain(surfaceflinger, hal_graphics_allocator) 15hal_client_domain(surfaceflinger, hal_graphics_composer) 16hal_client_domain(surfaceflinger, hal_configstore) 17allow surfaceflinger hidl_token_hwservice:hwservice_manager find; 18 19# Perform Binder IPC. 20binder_use(surfaceflinger) 21binder_call(surfaceflinger, binderservicedomain) 22binder_call(surfaceflinger, appdomain) 23binder_call(surfaceflinger, bootanim) 24binder_service(surfaceflinger) 25 26# Binder IPC to bu, presently runs in adbd domain. 27binder_call(surfaceflinger, adbd) 28 29# Read /proc/pid files for Binder clients. 30r_dir_file(surfaceflinger, binderservicedomain) 31r_dir_file(surfaceflinger, appdomain) 32 33# Access the GPU. 34allow surfaceflinger gpu_device:chr_file rw_file_perms; 35 36# Access /dev/graphics/fb0. 37allow surfaceflinger graphics_device:dir search; 38allow surfaceflinger graphics_device:chr_file rw_file_perms; 39 40# Access /dev/video1. 41allow surfaceflinger video_device:dir r_dir_perms; 42allow surfaceflinger video_device:chr_file rw_file_perms; 43 44# Create and use netlink kobject uevent sockets. 45allow surfaceflinger self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl; 46 47# Set properties. 48set_prop(surfaceflinger, system_prop) 49set_prop(surfaceflinger, exported_system_prop) 50set_prop(surfaceflinger, exported2_system_prop) 51set_prop(surfaceflinger, exported3_system_prop) 52set_prop(surfaceflinger, ctl_bootanim_prop) 53 54# Use open files supplied by an app. 55allow surfaceflinger appdomain:fd use; 56allow surfaceflinger app_data_file:file { read write }; 57 58# Allow writing surface traces to /data/misc/wmtrace. 59userdebug_or_eng(` 60 allow surfaceflinger wm_trace_data_file:dir rw_dir_perms; 61 allow surfaceflinger wm_trace_data_file:file { getattr setattr create w_file_perms }; 62') 63 64# Use socket supplied by adbd, for cmd gpu vkjson etc. 65allow surfaceflinger adbd:unix_stream_socket { read write getattr }; 66 67# Allow a dumpstate triggered screenshot 68binder_call(surfaceflinger, dumpstate) 69binder_call(surfaceflinger, shell) 70r_dir_file(surfaceflinger, dumpstate) 71 72# Needed on some devices for playing DRM protected content, 73# but seems expected and appropriate for all devices. 74allow surfaceflinger tee_device:chr_file rw_file_perms; 75 76 77# media.player service 78add_service(surfaceflinger, gpu_service) 79 80# do not use add_service() as hal_graphics_composer_default may be the 81# provider as well 82#add_service(surfaceflinger, surfaceflinger_service) 83allow surfaceflinger surfaceflinger_service:service_manager { add find }; 84 85allow surfaceflinger mediaserver_service:service_manager find; 86allow surfaceflinger permission_service:service_manager find; 87allow surfaceflinger power_service:service_manager find; 88allow surfaceflinger vr_manager_service:service_manager find; 89allow surfaceflinger window_service:service_manager find; 90 91 92# allow self to set SCHED_FIFO 93allow surfaceflinger self:global_capability_class_set sys_nice; 94allow surfaceflinger proc_meminfo:file r_file_perms; 95r_dir_file(surfaceflinger, cgroup) 96r_dir_file(surfaceflinger, system_file) 97allow surfaceflinger tmpfs:dir r_dir_perms; 98allow surfaceflinger system_server:fd use; 99allow surfaceflinger ion_device:chr_file r_file_perms; 100 101# pdx IPC 102pdx_server(surfaceflinger, display_client) 103pdx_server(surfaceflinger, display_manager) 104pdx_server(surfaceflinger, display_screenshot) 105pdx_server(surfaceflinger, display_vsync) 106 107pdx_client(surfaceflinger, bufferhub_client) 108pdx_client(surfaceflinger, performance_client) 109 110### 111### Neverallow rules 112### 113### surfaceflinger should NEVER do any of this 114 115# Do not allow accessing SDcard files as unsafe ejection could 116# cause the kernel to kill the process. 117neverallow surfaceflinger sdcard_type:file rw_file_perms; 118 119# b/68864350 120dontaudit surfaceflinger unlabeled:dir search; 121