blob: d8d573a1e43506d6c929d25c7811049fda6349aa [file] [log] [blame]
Primiano Tuccic80f9e02017-12-21 03:51:15 +01001# Perfetto tracing probes, has tracefs access.
Nick Kralevich5e372712018-09-27 10:21:37 -07002type traced_probes_exec, system_file_type, exec_type, file_type;
Primiano Tuccic80f9e02017-12-21 03:51:15 +01003
4# Allow init to exec the daemon.
5init_daemon_domain(traced_probes)
6
7# Write trace data to the Perfetto traced damon. This requires connecting to its
8# producer socket and obtaining a (per-process) tmpfs fd.
9allow traced_probes traced:fd use;
10allow traced_probes traced_tmpfs:file { read write getattr map };
11unix_socket_connect(traced_probes, traced_producer, traced)
12
13# Allow traced_probes to access tracefs.
Primiano Tuccic80f9e02017-12-21 03:51:15 +010014allow traced_probes debugfs_tracing:dir r_dir_perms;
15allow traced_probes debugfs_tracing:file rw_file_perms;
Primiano Tuccic80f9e02017-12-21 03:51:15 +010016allow traced_probes debugfs_trace_marker:file getattr;
Primiano Tuccib4b31f92018-02-09 11:15:22 +000017
18# TODO(primiano): temporarily I/O tracing categories are still
19# userdebug only until we nail down the blacklist/whitelist.
20userdebug_or_eng(`
Hector Dearman4802cbd2018-12-06 18:32:23 +000021allow traced_probes debugfs_tracing_debug:dir r_dir_perms;
Primiano Tuccib4b31f92018-02-09 11:15:22 +000022allow traced_probes debugfs_tracing_debug:file rw_file_perms;
Primiano Tuccic80f9e02017-12-21 03:51:15 +010023')
24
25# Allow traced_probes to start with a higher scheduling class and then downgrade
26# itself.
27allow traced_probes self:global_capability_class_set { sys_nice };
28
29# Allow procfs access
30r_dir_file(traced_probes, domain)
31
Florian Mayerd04ffff2019-04-02 16:19:09 +010032# Allow to read packages.list file.
33allow traced_probes packages_list_file:file r_file_perms;
34
Primiano Tuccid807d582018-02-16 13:54:41 +000035# Allow to log to kernel dmesg when starting / stopping ftrace.
36allow traced_probes kmsg_device:chr_file write;
37
Florian Mayeref6358b2018-02-23 16:47:38 +000038# Allow traced_probes to list the system partition.
39allow traced_probes system_file:dir { open read };
40
Florian Mayer9fcf22b2018-03-02 10:52:56 +000041# Allow traced_probes to list some of the data partition.
Benjamin Gordon7ed266c2018-08-15 13:34:20 -060042allow traced_probes self:global_capability_class_set dac_read_search;
Florian Mayer9fcf22b2018-03-02 10:52:56 +000043
Florian Mayerff146962018-04-06 12:55:22 +010044allow traced_probes apk_data_file:dir { getattr open read search };
45allow traced_probes dalvikcache_data_file:dir { getattr open read search };
Florian Mayer9fcf22b2018-03-02 10:52:56 +000046userdebug_or_eng(`
Florian Mayerd04ffff2019-04-02 16:19:09 +010047# search and getattr are granted via domain and coredomain, respectively.
48allow traced_probes system_data_file:dir { open read };
Florian Mayer9fcf22b2018-03-02 10:52:56 +000049')
Florian Mayerff146962018-04-06 12:55:22 +010050allow traced_probes system_app_data_file:dir { getattr open read search };
51allow traced_probes backup_data_file:dir { getattr open read search };
52allow traced_probes bootstat_data_file:dir { getattr open read search };
53allow traced_probes update_engine_data_file:dir { getattr open read search };
54allow traced_probes update_engine_log_data_file:dir { getattr open read search };
55allow traced_probes user_profile_data_file:dir { getattr open read search };
Florian Mayer9fcf22b2018-03-02 10:52:56 +000056
Primiano Tuccifeaf22b2018-03-02 19:27:06 +000057# Allow traced_probes to run atrace. atrace pokes at system services to enable
58# their userspace TRACE macros.
59domain_auto_trans(traced_probes, atrace_exec, atrace);
60
Lalit Magantid6ae1a52018-11-16 12:17:24 +000061# Allow traced_probes to kill atrace on timeout.
62allow traced_probes atrace:process sigkill;
Primiano Tuccifeaf22b2018-03-02 19:27:06 +000063
Primiano Tucci51dc7cb2018-09-18 08:51:06 +010064# Allow traced_probes to access /proc files for system stats.
65# Note: trace data is NOT exposed to anything other than shell and privileged
66# system apps that have access to the traced consumer socket.
67allow traced_probes {
68 proc_meminfo
69 proc_vmstat
70 proc_stat
71}:file r_file_perms;
72
Ben Murdochf948ea52019-03-13 17:08:43 +000073# Allow access to the IHealth and IPowerStats HAL service for tracing battery counters.
Primiano Tucci353b93a2018-12-02 21:59:10 +000074hal_client_domain(traced_probes, hal_health)
Ben Murdochf948ea52019-03-13 17:08:43 +000075hal_client_domain(traced_probes, hal_power_stats)
Primiano Tucci353b93a2018-12-02 21:59:10 +000076
Isabelle Taylore8c4ba82019-03-26 11:03:35 +000077# Allow access to Atrace HAL for enabling vendor/device specific tracing categories.
78hal_client_domain(traced_probes, hal_atrace)
79
Primiano Tuccia64d5bb2019-01-10 20:07:51 +000080# On debug builds allow to ingest system logs into the trace.
81userdebug_or_eng(`read_logd(traced_probes)')
82
Primiano Tuccic80f9e02017-12-21 03:51:15 +010083###
84### Neverallow rules
85###
86### traced_probes should NEVER do any of this
87
88# Disallow mapping executable memory (execstack and exec are already disallowed
89# globally in domain.te).
90neverallow traced_probes self:process execmem;
91
92# Block device access.
93neverallow traced_probes dev_type:blk_file { read write };
94
95# ptrace any other app
96neverallow traced_probes domain:process ptrace;
97
98# Disallows access to /data files.
Primiano Tuccid807d582018-02-16 13:54:41 +000099neverallow traced_probes {
Jeff Vander Stoepd25ccab2018-02-07 16:29:06 -0800100 data_file_type
Florian Mayer9fcf22b2018-03-02 10:52:56 +0000101 -apk_data_file
102 -dalvikcache_data_file
Jeff Vander Stoepd25ccab2018-02-07 16:29:06 -0800103 -system_data_file
Florian Mayer9fcf22b2018-03-02 10:52:56 +0000104 -system_app_data_file
105 -backup_data_file
106 -bootstat_data_file
107 -update_engine_data_file
108 -update_engine_log_data_file
109 -user_profile_data_file
Jeff Vander Stoepd25ccab2018-02-07 16:29:06 -0800110 # TODO(b/72998741) Remove vendor_data_file exemption. Further restricted in a
111 # subsequent neverallow. Currently only getattr and search are allowed.
112 -vendor_data_file
113 -zoneinfo_data_file
114}:dir *;
Florian Mayer9fcf22b2018-03-02 10:52:56 +0000115neverallow traced_probes system_data_file:dir ~{ getattr userdebug_or_eng(`open read') search };
Primiano Tuccid807d582018-02-16 13:54:41 +0000116neverallow traced_probes zoneinfo_data_file:dir ~r_dir_perms;
117neverallow traced_probes { data_file_type -zoneinfo_data_file }:lnk_file *;
Florian Mayerd04ffff2019-04-02 16:19:09 +0100118neverallow traced_probes { data_file_type -zoneinfo_data_file -packages_list_file }:file *;
Primiano Tuccic80f9e02017-12-21 03:51:15 +0100119
120# Only init is allowed to enter the traced_probes domain via exec()
121neverallow { domain -init } traced_probes:process transition;
122neverallow * traced_probes:process dyntransition;