android_system_sepolicy/public/ppp.te
Nick Kralevich 5e37271df8 Introduce system_file_type
system_file_type is a new attribute used to identify files which exist
on the /system partition. It's useful for allow rules in init, which are
based off of a blacklist of writable files. Additionally, it's useful
for constructing neverallow rules to prevent regressions.

Additionally, add commented out tests which enforce that all files on
the /system partition have the system_file_type attribute. These tests
will be uncommented in a future change after all the device-specific
policies are cleaned up.

Test: Device boots and no obvious problems.
Change-Id: Id9bae6625f042594c8eba74ca712abb09702c1e5
2018-09-27 12:52:09 -07:00

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# Point to Point Protocol daemon
type ppp, domain;
type ppp_device, dev_type;
type ppp_exec, system_file_type, exec_type, file_type;
net_domain(ppp)
r_dir_file(ppp, proc_net_type)
allow ppp mtp:socket rw_socket_perms;
# ioctls needed for VPN.
allowxperm ppp self:udp_socket ioctl priv_sock_ioctls;
allowxperm ppp mtp:socket ioctl ppp_ioctls;
allow ppp mtp:unix_dgram_socket rw_socket_perms;
allow ppp ppp_device:chr_file rw_file_perms;
allow ppp self:global_capability_class_set net_admin;
allow ppp system_file:file rx_file_perms;
not_full_treble(`allow ppp vendor_file:file rx_file_perms;')
allow ppp vpn_data_file:dir w_dir_perms;
allow ppp vpn_data_file:file create_file_perms;
allow ppp mtp:fd use;