is_flag_enabled(RELEASE_AVF_ENABLE_EARLY_VM, ` # Domain for a child process that manages early VMs available before /data mount, on behalf of # its parent. type early_virtmgr, domain, coredomain; type early_virtmgr_exec, system_file_type, exec_type, file_type; use_bootstrap_libs(early_virtmgr) # Let early_virtmgr create files and directories inside /mnt/vm/early. allow early_virtmgr vm_data_file:dir create_dir_perms; allow early_virtmgr vm_data_file:file create_file_perms; allow early_virtmgr vm_data_file:sock_file create_file_perms; # Allow early_virtmgr to communicate use, read and write over the adb connection. allow early_virtmgr adbd:fd use; allow early_virtmgr adbd:unix_stream_socket { getattr read write }; # Allow writing VM logs to the shell console allow early_virtmgr devpts:chr_file { read write getattr ioctl }; # Let the early_virtmgr domain use Binder. binder_use(early_virtmgr) # When early_virtmgr execs a file with the crosvm_exec label, run it in the crosvm domain. domain_auto_trans(early_virtmgr, crosvm_exec, crosvm) # Let early_virtmgr kill crosvm. allow early_virtmgr crosvm:process sigkill; # Allow early_virtmgr to read apex-info-list.xml and access the APEX files listed there. allow early_virtmgr apex_info_file:file r_file_perms; allow early_virtmgr apex_data_file:dir search; # Ignore harmless denials on /proc/self/fd dontaudit early_virtmgr self:dir write; # Let early_virtmgr to accept vsock connection from the guest VMs allow early_virtmgr self:vsock_socket { create_socket_perms_no_ioctl listen accept }; # Allow early_virtmgr to inspect all hypervisor capabilities. get_prop(early_virtmgr, hypervisor_prop) get_prop(early_virtmgr, hypervisor_pvmfw_prop) get_prop(early_virtmgr, hypervisor_restricted_prop) get_prop(early_virtmgr, hypervisor_virtualizationmanager_prop) # Allow early_virtmgr to read file system DT for VM reference DT and AVF debug policy r_dir_file(early_virtmgr, proc_dt_avf) r_dir_file(early_virtmgr, sysfs_dt_avf) # early_virtmgr to be client of secretkeeper HAL. It ferries SecretManagement messages from pVM # to HAL. hal_client_domain(early_virtmgr, hal_secretkeeper); # Allow reading files under /proc/[crosvm pid]/, for collecting CPU & memory usage inside VM. r_dir_file(early_virtmgr, crosvm); # Allow early_virtmgr to: # 1) bind to a vsock port less than 1024, because early VMs use static CIDs less than 1024 # 2) call RLIMIT_MEMLOCK for itself allow early_virtmgr self:global_capability_class_set { net_bind_service ipc_lock sys_resource }; # early_virtmgr may print messages to kmsg_debug_device. allow early_virtmgr kmsg_debug_device:chr_file w_file_perms; ### ### Neverallow rules ### # Only crosvm and early_virtmgr can access vm_data_file neverallow { domain -crosvm -early_virtmgr -init } vm_data_file:dir no_w_dir_perms; neverallow { domain -crosvm -early_virtmgr } vm_data_file:file no_rw_file_perms; # No other domains can accept vsock connection from the guest VMs neverallow { domain -early_virtmgr } early_virtmgr:vsock_socket { accept bind create connect listen }; ')