1 files changed, 152 insertions, 0 deletions
diff --git a/prebuilts/api/32.0/private/traced_probes.te b/prebuilts/api/32.0/private/traced_probes.te
new file mode 100644
index 000000000..730a45c95
--- /dev/null
+++ b/prebuilts/api/32.0/private/traced_probes.te
@@ -0,0 +1,152 @@
+# Perfetto tracing probes, has tracefs access.
+type traced_probes_exec, system_file_type, exec_type, file_type;
+type traced_probes_tmpfs, file_type;
+
+# Allow init to exec the daemon.
+init_daemon_domain(traced_probes)
+tmpfs_domain(traced_probes)
+
+# Write trace data to the Perfetto traced damon. This requires connecting to its
+# producer socket and obtaining a (per-process) tmpfs fd.
+perfetto_producer(traced_probes)
+
+# Allow traced_probes to access tracefs.
+allow traced_probes debugfs_tracing:dir r_dir_perms;
+allow traced_probes debugfs_tracing:file rw_file_perms;
+allow traced_probes debugfs_trace_marker:file getattr;
+allow traced_probes debugfs_tracing_printk_formats:file r_file_perms;
+
+# Allow traced_probes to access mm_events trace instance
+allow traced_probes debugfs_tracing_instances:dir search;
+allow traced_probes debugfs_mm_events_tracing:dir search;
+allow traced_probes debugfs_mm_events_tracing:file rw_file_perms;
+
+# TODO(primiano): temporarily I/O tracing categories are still
+# userdebug only until we nail down the denylist/allowlist.
+userdebug_or_eng(`
+allow traced_probes debugfs_tracing_debug:dir r_dir_perms;
+allow traced_probes debugfs_tracing_debug:file rw_file_perms;
+')
+
+# Allow traced_probes to start with a higher scheduling class and then downgrade
+# itself.
+allow traced_probes self:global_capability_class_set { sys_nice };
+
+# Allow procfs access
+r_dir_file(traced_probes, domain)
+
+# Allow to temporarily lift the kptr_restrict setting and build a symbolization
+# map reading /proc/kallsyms.
+userdebug_or_eng(`set_prop(traced_probes, lower_kptr_restrict_prop)')
+allow traced_probes proc_kallsyms:file r_file_perms;
+
+# Allow to read packages.list file.
+allow traced_probes packages_list_file:file r_file_perms;
+
+# Allow to log to kernel dmesg when starting / stopping ftrace.
+allow traced_probes kmsg_device:chr_file write;
+
+# Allow traced_probes to list the system partition.
+allow traced_probes system_file:dir { open read };
+
+# Allow traced_probes to list some of the data partition.
+allow traced_probes self:global_capability_class_set dac_read_search;
+
+allow traced_probes apk_data_file:dir { getattr open read search };
+allow traced_probes { apex_art_data_file apex_module_data_file }:dir { getattr open read search };
+allow traced_probes dalvikcache_data_file:dir { getattr open read search };
+userdebug_or_eng(`
+# search and getattr are granted via domain and coredomain, respectively.
+allow traced_probes system_data_file:dir { open read };
+')
+allow traced_probes system_app_data_file:dir { getattr open read search };
+allow traced_probes backup_data_file:dir { getattr open read search };
+allow traced_probes bootstat_data_file:dir { getattr open read search };
+allow traced_probes update_engine_data_file:dir { getattr open read search };
+allow traced_probes update_engine_log_data_file:dir { getattr open read search };
+allow traced_probes { user_profile_root_file user_profile_data_file}:dir { getattr open read search };
+
+# Allow traced_probes to run atrace. atrace pokes at system services to enable
+# their userspace TRACE macros.
+domain_auto_trans(traced_probes, atrace_exec, atrace);
+
+# Allow traced_probes to kill atrace on timeout.
+allow traced_probes atrace:process sigkill;
+
+# Allow traced_probes to access /proc files for system stats.
+# Note: trace data is NOT exposed to anything other than shell and privileged
+# system apps that have access to the traced consumer socket.
+allow traced_probes {
+  proc_meminfo
+  proc_vmstat
+  proc_stat
+}:file r_file_perms;
+
+# Allow access to read /sys/class/devfreq/ and /$DEVICE/cur_freq files
+allow traced_probes sysfs_devfreq_dir:dir r_dir_perms;
+allow traced_probes sysfs_devfreq_cur:file r_file_perms;
+
+# Allow access to the IHealth and IPowerStats HAL service for tracing battery counters.
+hal_client_domain(traced_probes, hal_health)
+hal_client_domain(traced_probes, hal_power_stats)
+
+# Allow access to Atrace HAL for enabling vendor/device specific tracing categories.
+hal_client_domain(traced_probes, hal_atrace)
+
+# On debug builds allow to ingest system logs into the trace.
+userdebug_or_eng(`read_logd(traced_probes)')
+
+# Allow traced_probes to talk to statsd for logging metrics.
+unix_socket_send(traced_probes, statsdw, statsd)
+
+###
+### Neverallow rules
+###
+### traced_probes should NEVER do any of this
+
+# Disallow mapping executable memory (execstack and exec are already disallowed
+# globally in domain.te).
+neverallow traced_probes self:process execmem;
+
+# Block device access.
+neverallow traced_probes dev_type:blk_file { read write };
+
+# ptrace any other app
+neverallow traced_probes domain:process ptrace;
+
+# Disallows access to /data files.
+neverallow traced_probes {
+  data_file_type
+  -apex_module_data_file
+  -apex_art_data_file
+  -apk_data_file
+  -dalvikcache_data_file
+  -system_data_file
+  -system_data_root_file
+  -system_app_data_file
+  -backup_data_file
+  -bootstat_data_file
+  -update_engine_data_file
+  -update_engine_log_data_file
+  -user_profile_root_file
+  -user_profile_data_file
+  # TODO(b/72998741) Remove vendor_data_file exemption. Further restricted in a
+  # subsequent neverallow. Currently only getattr and search are allowed.
+  -vendor_data_file
+  -zoneinfo_data_file
+  with_native_coverage(`-method_trace_data_file')
+}:dir *;
+neverallow traced_probes system_data_file:dir ~{ getattr userdebug_or_eng(`open read') search };
+neverallow traced_probes zoneinfo_data_file:dir ~r_dir_perms;
+neverallow traced_probes { data_file_type -zoneinfo_data_file }:lnk_file *;
+neverallow traced_probes {
+  data_file_type
+  -zoneinfo_data_file
+  -packages_list_file
+  with_native_coverage(`-method_trace_data_file')
+}:file *;
+
+# Only init is allowed to enter the traced_probes domain via exec()
+neverallow { domain -init } traced_probes:process transition;
+neverallow * traced_probes:process dyntransition;
+