5e37271df8
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
68 lines
2.4 KiB
Text
68 lines
2.4 KiB
Text
# Perfetto command-line client. Can be used only from the domains that are
|
|
# explicitly whitelisted with a domain_auto_trans(X, perfetto_exec, perfetto).
|
|
# This command line client accesses the privileged socket of the traced
|
|
# daemon.
|
|
|
|
type perfetto, domain, coredomain;
|
|
type perfetto_exec, system_file_type, exec_type, file_type;
|
|
|
|
tmpfs_domain(perfetto);
|
|
|
|
# Allow to access traced's privileged consumer socket.
|
|
unix_socket_connect(perfetto, traced_consumer, traced)
|
|
|
|
# Allow to write and unlink traces into /data/misc/perfetto-traces.
|
|
allow perfetto perfetto_traces_data_file:dir rw_dir_perms;
|
|
allow perfetto perfetto_traces_data_file:file create_file_perms;
|
|
|
|
# Allow to access binder to pass the traces to Dropbox.
|
|
binder_use(perfetto)
|
|
binder_call(perfetto, system_server)
|
|
allow perfetto dropbox_service:service_manager find;
|
|
|
|
# Allow statsd and shell to pipe the trace config to perfetto on stdin and to
|
|
# print out on stdout/stderr.
|
|
allow perfetto statsd:fd use;
|
|
allow perfetto statsd:fifo_file { getattr read write };
|
|
allow perfetto shell:fd use;
|
|
allow perfetto shell:fifo_file { getattr read write };
|
|
|
|
# Allow to communicate use, read and write over the adb connection.
|
|
allow perfetto adbd:fd use;
|
|
allow perfetto adbd:unix_stream_socket { read write };
|
|
|
|
# allow adbd to reap perfetto
|
|
allow perfetto adbd:process { sigchld };
|
|
|
|
# Allow to access /dev/pts when launched in an adb shell.
|
|
allow perfetto devpts:chr_file rw_file_perms;
|
|
|
|
###
|
|
### Neverallow rules
|
|
###
|
|
### perfetto should NEVER do any of this
|
|
|
|
# Disallow mapping executable memory (execstack and exec are already disallowed
|
|
# globally in domain.te).
|
|
neverallow perfetto self:process execmem;
|
|
|
|
# Block device access.
|
|
neverallow perfetto dev_type:blk_file { read write };
|
|
|
|
# ptrace any other process
|
|
neverallow perfetto domain:process ptrace;
|
|
|
|
# Disallows access to other /data files.
|
|
neverallow perfetto {
|
|
data_file_type
|
|
-system_data_file
|
|
# TODO(b/72998741) Remove exemption. Further restricted in a subsequent
|
|
# neverallow. Currently only getattr and search are allowed.
|
|
-vendor_data_file
|
|
-zoneinfo_data_file
|
|
-perfetto_traces_data_file
|
|
}:dir *;
|
|
neverallow perfetto { system_data_file -perfetto_traces_data_file }:dir ~{ getattr search };
|
|
neverallow perfetto zoneinfo_data_file:dir ~r_dir_perms;
|
|
neverallow perfetto { data_file_type -zoneinfo_data_file -perfetto_traces_data_file }:lnk_file *;
|
|
neverallow perfetto { data_file_type -zoneinfo_data_file -perfetto_traces_data_file }:file ~write;
|