public/hal_configstore.te

# HwBinder IPC from client to server
binder_call(hal_configstore_client, hal_configstore_server)

allow hal_configstore_client hal_configstore_ISurfaceFlingerConfigs:hwservice_manager find;

add_hwservice(hal_configstore_server, hal_configstore_ISurfaceFlingerConfigs)
# As opposed to the rules of most other HALs, the different services exposed by
# this HAL should be restricted to different clients. Thus, the allow rules for
# clients are defined in the .te files of the clients.

# hal_configstore runs with a strict seccomp filter. Use crash_dump's
# fallback path to collect crash data.
crash_dump_fallback(hal_configstore_server)

###
### neverallow rules
###

# Should never execute an executable without a domain transition
neverallow hal_configstore_server { file_type fs_type }:file execute_no_trans;

# Should never need network access. Disallow sockets except for
# for unix stream/dgram sockets used for logging/debugging.
neverallow hal_configstore_server domain:{
  rawip_socket tcp_socket udp_socket
  netlink_route_socket netlink_selinux_socket
  socket netlink_socket packet_socket key_socket appletalk_socket
  netlink_tcpdiag_socket netlink_nflog_socket
  netlink_xfrm_socket netlink_audit_socket
  netlink_dnrt_socket netlink_kobject_uevent_socket tun_socket
  netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket
  netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket
  netlink_rdma_socket netlink_crypto_socket
} *;
neverallow hal_configstore_server {
  domain
  -hal_configstore_server
  -logd
  userdebug_or_eng(`-su')
  -tombstoned
}:{ unix_dgram_socket unix_stream_socket } *;

# Should never need access to anything on /data
neverallow hal_configstore_server {
  data_file_type
  -anr_data_file # for crash dump collection
  -tombstone_data_file # for crash dump collection
  -zoneinfo_data_file # granted to domain
}:{ file fifo_file sock_file } *;

# Should never need sdcard access
neverallow hal_configstore_server {
    sdcard_type
    fuse sdcardfs vfat exfat        # manual expansion for completeness
}:dir ~getattr;
neverallow hal_configstore_server {
    sdcard_type
    fuse sdcardfs vfat exfat        # manual expansion for completeness
}:file *;

# Do not permit access to service_manager and vndservice_manager
neverallow hal_configstore_server *:service_manager *;

# No privileged capabilities
neverallow hal_configstore_server self:capability_class_set *;

# No ptracing other processes
neverallow hal_configstore_server *:process ptrace;

# no relabeling
neverallow hal_configstore_server *:dir_file_class_set { relabelfrom relabelto };