| # HwBinder IPC from client to server, and callbacks |
| binder_use(hal_drm_server) |
| binder_call(hal_drm_client, hal_drm_server) |
| binder_call(hal_drm_server, hal_drm_client) |
| |
| hal_attribute_hwservice(hal_drm, hal_drm_hwservice) |
| hal_attribute_service(hal_drm, hal_drm_service) |
| |
| allow hal_drm hidl_memory_hwservice:hwservice_manager find; |
| |
| # Required by Widevine DRM (b/22990512) |
| allow hal_drm self:process execmem; |
| |
| # Permit reading device's serial number from system properties |
| get_prop(hal_drm_server, serialno_prop) |
| |
| # Read files already opened under /data |
| allow hal_drm system_data_file:file { getattr read }; |
| |
| # Read access to pseudo filesystems |
| r_dir_file(hal_drm, cgroup) |
| allow hal_drm cgroup:dir { search write }; |
| allow hal_drm cgroup:file w_file_perms; |
| |
| r_dir_file(hal_drm, cgroup_v2) |
| allow hal_drm cgroup_v2:dir { search write }; |
| allow hal_drm cgroup_v2:file w_file_perms; |
| |
| # Allow dumpsys Widevine without root |
| userdebug_or_eng(` |
| allow hal_drm_server shell:fd use; |
| allow hal_drm_server shell:fifo_file write; |
| ') |
| |
| # Allow access to ion memory allocation device |
| allow hal_drm ion_device:chr_file rw_file_perms; |
| allow hal_drm hal_graphics_allocator:fd use; |
| |
| # Allow access to hidl_memory allocation service |
| allow hal_drm hal_allocator_server:fd use; |
| |
| # Allow access to fds allocated by mediaserver |
| allow hal_drm mediaserver:fd use; |
| |
| allow hal_drm sysfs:file r_file_perms; |
| |
| allow hal_drm tee_device:chr_file rw_file_perms; |
| |
| allow hal_drm_server { appdomain -isolated_app }:fd use; |
| |
| # only allow unprivileged socket ioctl commands |
| allowxperm hal_drm self:{ rawip_socket tcp_socket udp_socket } |
| ioctl { unpriv_sock_ioctls unpriv_tty_ioctls }; |
| |
| ### |
| ### neverallow rules |
| ### |
| |
| # hal_drm should never execute any executable without a |
| # domain transition |
| neverallow hal_drm_server { file_type fs_type }:file execute_no_trans; |
| |
| # do not allow privileged socket ioctl commands |
| neverallowxperm hal_drm_server domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls; |