bpfloader.te

# bpf program loader
type bpfloader, domain;
type bpfloader_exec, exec_type, file_type;
typeattribute bpfloader coredomain;

# Process need CAP_NET_ADMIN to run bpf programs as cgroup filter
allow bpfloader self:global_capability_class_set net_admin;

r_dir_file(bpfloader, cgroup_bpf)

# These permission is required for pin bpf program for netd.
allow bpfloader fs_bpf:dir  create_dir_perms;
allow bpfloader fs_bpf:file create_file_perms;
allow bpfloader devpts:chr_file { read write };

# TODO: unknown fd pass denials, need further investigation.
dontaudit bpfloader netd:fd use;

# Use pinned bpf map files from netd.
allow bpfloader netd:bpf { map_read map_write };
allow bpfloader self:bpf { prog_load prog_run };

# Neverallow rules
neverallow { domain -bpfloader } *:bpf { prog_load prog_run };
neverallow { domain -netd -bpfloader } bpfloader_exec:file { execute execute_no_trans };
neverallow bpfloader domain:{ tcp_socket udp_socket rawip_socket } *;
# only system_server, netd and bpfloader can read/write the bpf maps
neverallow { domain -system_server -netd -bpfloader} netd:bpf { map_read map_write };