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 5add_hwservice(hal_drm_server, hal_drm_hwservice) 6allow hal_drm_client hal_drm_hwservice:hwservice_manager find; 7 8allow hal_drm hidl_memory_hwservice:hwservice_manager find; 9 10# Required by Widevine DRM (b/22990512) 11allow hal_drm self:process execmem; 12 13# Permit reading device's serial number from system properties 14get_prop(hal_drm, serialno_prop) 15 16# System file accesses 17allow hal_drm system_file:dir r_dir_perms; 18allow hal_drm system_file:file r_file_perms; 19allow hal_drm system_file:lnk_file r_file_perms; 20 21# Read files already opened under /data 22allow hal_drm system_data_file:dir { search getattr }; 23allow hal_drm system_data_file:file { getattr read }; 24allow hal_drm system_data_file:lnk_file r_file_perms; 25 26# Read access to pseudo filesystems 27r_dir_file(hal_drm, cgroup) 28allow hal_drm cgroup:dir { search write }; 29allow hal_drm cgroup:file w_file_perms; 30 31# Allow access to ion memory allocation device 32allow hal_drm ion_device:chr_file rw_file_perms; 33allow hal_drm hal_graphics_allocator:fd use; 34 35# Allow access to fds allocated by mediaserver 36allow hal_drm mediaserver:fd use; 37 38# Allow access to app_data and media_data_files 39allow hal_drm media_data_file:dir create_dir_perms; 40allow hal_drm media_data_file:file create_file_perms; 41allow hal_drm media_data_file:file { getattr read }; 42 43allow hal_drm sysfs:file r_file_perms; 44 45allow hal_drm tee_device:chr_file rw_file_perms; 46 47# only allow unprivileged socket ioctl commands 48allowxperm hal_drm self:{ rawip_socket tcp_socket udp_socket } 49 ioctl { unpriv_sock_ioctls unpriv_tty_ioctls }; 50 51### 52### neverallow rules 53### 54 55# hal_drm should never execute any executable without a 56# domain transition 57neverallow hal_drm { file_type fs_type }:file execute_no_trans; 58 59# do not allow privileged socket ioctl commands 60neverallowxperm hal_drm domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls; 61