1typeattribute incidentd coredomain;
2typeattribute incidentd mlstrustedsubject;
3
4init_daemon_domain(incidentd)
5type incidentd_exec, exec_type, file_type;
6binder_use(incidentd)
7wakelock_use(incidentd)
8
9# Allow incidentd to scan through /proc/pid for all processes
10r_dir_file(incidentd, domain)
11
12# Allow incidentd to kill incident_helper when timeout
13allow incidentd incident_helper:process sigkill;
14
15# Allow executing files on system, such as:
16#   /system/bin/toolbox
17#   /system/bin/logcat
18#   /system/bin/dumpsys
19allow incidentd system_file:file execute_no_trans;
20allow incidentd toolbox_exec:file rx_file_perms;
21
22# section id 2001, allow reading /proc/pagetypeinfo
23allow incidentd proc_pagetypeinfo:file r_file_perms;
24
25# section id 2002, allow reading /d/wakeup_sources
26allow incidentd debugfs_wakeup_sources:file r_file_perms;
27
28# section id 2003, allow executing top
29allow incidentd proc_meminfo:file { open read };
30
31# section id 2004, allow reading /sys/devices/system/cpu/cpufreq/all_time_in_state
32allow incidentd sysfs_devices_system_cpu:file r_file_perms;
33
34# section id 2005, allow reading ps dump in full
35allow incidentd domain:process getattr;
36
37# section id 2006, allow reading /sys/class/power_supply/bms/battery_type
38allow incidentd sysfs_batteryinfo:dir { search };
39allow incidentd sysfs_batteryinfo:file r_file_perms;
40
41# section id 2007, allow reading LAST_KMSG /sys/fs/pstore/console-ramoops
42userdebug_or_eng(`allow incidentd pstorefs:dir search');
43userdebug_or_eng(`allow incidentd pstorefs:file r_file_perms');
44
45# Create and write into /data/misc/incidents
46allow incidentd incident_data_file:dir rw_dir_perms;
47allow incidentd incident_data_file:file create_file_perms;
48
49# Enable incidentd to get stack traces.
50binder_use(incidentd)
51hwbinder_use(incidentd)
52allow incidentd hwservicemanager:hwservice_manager { list };
53get_prop(incidentd, hwservicemanager_prop)
54allow incidentd hidl_manager_hwservice:hwservice_manager { find };
55
56# Read files in /proc
57allow incidentd {
58  proc_cmdline
59  proc_pipe_conf
60  proc_stat
61}:file r_file_perms;
62
63# Signal java processes to dump their stack and get the results
64allow incidentd { appdomain ephemeral_app system_server }:process signal;
65
66# Signal native processes to dump their stack.
67# This list comes from native_processes_to_dump in incidentd/utils.c
68allow incidentd {
69  # This list comes from native_processes_to_dump in dumputils/dump_utils.cpp
70  audioserver
71  cameraserver
72  drmserver
73  inputflinger
74  mediadrmserver
75  mediaextractor
76  mediametrics
77  mediaserver
78  sdcardd
79  statsd
80  surfaceflinger
81
82  # This list comes from hal_interfaces_to_dump in dumputils/dump_utils.cpp
83  hal_audio_server
84  hal_bluetooth_server
85  hal_camera_server
86  hal_graphics_composer_server
87  hal_sensors_server
88  hal_vr_server
89  mediacodec # TODO(b/36375899): hal_omx_server
90}:process signal;
91
92# Allow incidentd to make binder calls to any binder service
93binder_call(incidentd, system_server)
94binder_call(incidentd, appdomain)
95
96# Reading /proc/PID/maps of other processes
97userdebug_or_eng(`allow incidentd self:global_capability_class_set { sys_ptrace }');
98# incidentd has capability sys_ptrace, but should only use that capability for
99# accessing sensitive /proc/PID files, never for using ptrace attach.
100neverallow incidentd *:process ptrace;
101
102allow incidentd self:global_capability_class_set {
103    # Send signals to processes
104    kill
105};
106
107# Connect to tombstoned to intercept dumps.
108unix_socket_connect(incidentd, tombstoned_intercept, tombstoned)
109
110# Run a shell.
111allow incidentd shell_exec:file rx_file_perms;
112
113# logd access - work to be done is a PII safe log (possibly an event log?)
114userdebug_or_eng(`read_logd(incidentd)')
115# TODO control_logd(incidentd)
116
117# Allow incidentd to find these standard groups of services.
118# Others can be allowlisted individually.
119allow incidentd {
120  system_server_service
121  app_api_service
122  system_api_service
123}:service_manager find;
124
125# Only incidentd can publish the binder service
126add_service(incidentd, incident_service)
127
128# Allow pipes from (and only from) incident
129allow incidentd incident:fd use;
130allow incidentd incident:fifo_file write;
131
132# Allow incident to call back to incident with status updates.
133binder_call(incidentd, incident)
134
135###
136### neverallow rules
137###
138
139# only system_server, system_app and incident command can find the incident service
140neverallow {
141  domain
142  -incident
143  -incidentd
144  -statsd
145  -system_app
146  -system_server
147} incident_service:service_manager find;
148
149# only incidentd and the other root services in limited circumstances
150# can get to the files in /data/misc/incidents
151#
152# write, execute, append are forbidden almost everywhere
153neverallow { domain -incidentd -init -vold } incident_data_file:file {
154  w_file_perms
155  x_file_perms
156  create
157  rename
158  setattr
159  unlink
160  append
161};
162# read is also allowed by system_server, for when the file is handed to dropbox
163neverallow { domain -incidentd -init -vold -system_server } incident_data_file:file r_file_perms;
164# limited access to the directory itself
165neverallow { domain -incidentd -init -vold } incident_data_file:dir create_dir_perms;
166
167