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