1# HwBinder IPC from client to server, and callbacks 2binder_use(hal_drm_server) 3binder_call(hal_drm_client, hal_drm_server) 4binder_call(hal_drm_server, hal_drm_client) 5 6hal_attribute_hwservice(hal_drm, hal_drm_hwservice) 7hal_attribute_service(hal_drm, hal_drm_service) 8 9allow hal_drm hidl_memory_hwservice:hwservice_manager find; 10 11# Required by Widevine DRM (b/22990512) 12allow hal_drm self:process execmem; 13 14# Permit reading device's serial number from system properties 15get_prop(hal_drm, serialno_prop) 16 17# Read files already opened under /data 18allow hal_drm system_data_file:file { getattr read }; 19 20# Read access to pseudo filesystems 21r_dir_file(hal_drm, cgroup) 22allow hal_drm cgroup:dir { search write }; 23allow hal_drm cgroup:file w_file_perms; 24 25r_dir_file(hal_drm, cgroup_v2) 26allow hal_drm cgroup_v2:dir { search write }; 27allow hal_drm cgroup_v2:file w_file_perms; 28 29# Allow dumpsys Widevine without root 30userdebug_or_eng(` 31 allow hal_drm_server shell:fd use; 32 allow hal_drm_server shell:fifo_file write; 33') 34 35# Allow access to ion memory allocation device 36allow hal_drm ion_device:chr_file rw_file_perms; 37allow hal_drm hal_graphics_allocator:fd use; 38 39# Allow access to hidl_memory allocation service 40allow hal_drm hal_allocator_server:fd use; 41 42# Allow access to fds allocated by mediaserver 43allow hal_drm mediaserver:fd use; 44 45allow hal_drm sysfs:file r_file_perms; 46 47allow hal_drm tee_device:chr_file rw_file_perms; 48 49allow hal_drm_server { appdomain -isolated_app }:fd use; 50 51# only allow unprivileged socket ioctl commands 52allowxperm hal_drm self:{ rawip_socket tcp_socket udp_socket } 53 ioctl { unpriv_sock_ioctls unpriv_tty_ioctls }; 54 55### 56### neverallow rules 57### 58 59# hal_drm should never execute any executable without a 60# domain transition 61neverallow hal_drm_server { file_type fs_type }:file execute_no_trans; 62 63# do not allow privileged socket ioctl commands 64neverallowxperm hal_drm_server domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls; 65