private/bpfloader.te

type bpfloader_exec, system_file_type, exec_type, file_type;

typeattribute bpfloader bpfdomain;

# allow bpfloader to write to the kernel log (starts early)
allow bpfloader kmsg_device:chr_file w_file_perms;

# These permissions are required to pin ebpf maps & programs.
allow bpfloader bpffs_type:dir { add_name create remove_name search write };
allow bpfloader bpffs_type:file { create getattr read rename setattr };
allow bpfloader bpffs_type:lnk_file { create getattr read };
allow { bpffs_type -fs_bpf } fs_bpf:filesystem associate;

# Allow bpfloader to create bpf maps and programs.
allow bpfloader self:bpf { map_create map_read map_write prog_load prog_run };

allow bpfloader self:capability { chown sys_admin net_admin };

allow bpfloader sysfs_fs_fuse_bpf:file r_file_perms;

set_prop(bpfloader, bpf_progs_loaded_prop)

allow bpfloader bpfloader_exec:file execute_no_trans;

###
### Neverallow rules
###

# TODO: get rid of init & vendor_init; Note: we don't care about getattr/mounton/search
neverallow { domain -init -vendor_init } bpffs_type:dir { open read setattr };
neverallow { domain -bpfloader } bpffs_type:dir { add_name create remove_name write };
neverallow domain bpffs_type:dir ~{ add_name create getattr mounton open read remove_name search setattr write };

# TODO: get rid of init & vendor_init
neverallow { domain -bpfloader -init -vendor_init } bpffs_type:file { map open setattr };
neverallow { domain -bpfloader } bpffs_type:file { create getattr rename };
neverallow { domain -bpfloader -gpuservice -init -lmkd -mediaprovider_app -netd -netutils_wrapper                -system_server -vendor_init } fs_bpf:file               read;
neverallow { domain -bpfloader             -init                                                  -network_stack                -vendor_init } fs_bpf_net_private:file   read;
neverallow { domain -bpfloader             -init                                                  -network_stack -system_server -vendor_init } fs_bpf_net_shared:file    read;
neverallow { domain -bpfloader             -init                          -netd                   -network_stack -system_server -vendor_init } fs_bpf_netd_readonly:file read;
neverallow { domain -bpfloader             -init                          -netd -netutils_wrapper -network_stack -system_server -vendor_init } fs_bpf_netd_shared:file   read;
neverallow { domain -bpfloader             -init                                                  -network_stack                -vendor_init } fs_bpf_tethering:file     read;
neverallow { domain -bpfloader -gpuservice                                -netd -netutils_wrapper -network_stack -system_server              } { bpffs_type -fs_bpf_vendor }:file write;
neverallow domain bpffs_type:file ~{ create getattr map open read rename setattr write };

neverallow { domain -bpfloader } bpffs_type:lnk_file ~read;
neverallow { domain -bpfdomain } bpffs_type:lnk_file read;

neverallow { domain -bpfloader } *:bpf { map_create prog_load };

neverallow {
  domain
  -bpfloader
  -gpuservice
  -hal_health_server
  -mediaprovider_app
  -netd
  -netutils_wrapper
  -network_stack
  -system_server
} *:bpf prog_run;
neverallow { domain -bpfloader -gpuservice -lmkd -mediaprovider_app -netd -network_stack -system_server } *:bpf { map_read map_write };
neverallow { domain -bpfloader -init } bpfloader_exec:file { execute execute_no_trans };

neverallow { coredomain -bpfloader -init } fs_bpf_vendor:file *;

neverallow bpfloader *:{ tcp_socket udp_socket rawip_socket } *;

# No domain should be allowed to ptrace bpfloader
neverallow { domain userdebug_or_eng(`-llkd') } bpfloader:process ptrace;

# Currently only bpfloader.rc (which runs as init) can do bpf sysctl setup
# this should perhaps be moved to the bpfloader binary itself.  Allow both.
neverallow { domain -bpfloader -init } proc_bpf:file write;