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      1 # HwBinder IPC from client to server, and callbacks
      2 binder_call(hal_cas_client, hal_cas_server)
      3 binder_call(hal_cas_server, hal_cas_client)
      4 
      5 add_hwservice(hal_cas_server, hal_cas_hwservice)
      6 allow hal_cas_client hal_cas_hwservice:hwservice_manager find;
      7 allow hal_cas_server hidl_memory_hwservice:hwservice_manager find;
      8 
      9 # Permit reading device's serial number from system properties
     10 get_prop(hal_cas_server, serialno_prop)
     11 
     12 # Read files already opened under /data
     13 allow hal_cas system_data_file:file { getattr read };
     14 
     15 # Read access to pseudo filesystems
     16 r_dir_file(hal_cas, cgroup)
     17 allow hal_cas cgroup:dir { search write };
     18 allow hal_cas cgroup:file w_file_perms;
     19 
     20 # Allow access to ion memory allocation device
     21 allow hal_cas ion_device:chr_file rw_file_perms;
     22 allow hal_cas hal_graphics_allocator:fd use;
     23 
     24 allow hal_cas tee_device:chr_file rw_file_perms;
     25 
     26 ###
     27 ### neverallow rules
     28 ###
     29 
     30 # hal_cas should never execute any executable without a
     31 # domain transition
     32 neverallow hal_cas_server { file_type fs_type }:file execute_no_trans;
     33 
     34 # do not allow privileged socket ioctl commands
     35 neverallowxperm hal_cas_server domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
     36