1typeattribute incidentd coredomain;
2typeattribute incidentd mlstrustedsubject;
3
4init_daemon_domain(incidentd)
5type incidentd_exec, system_file_type, 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 1002, allow reading kernel version /proc/version
23allow incidentd proc_version:file r_file_perms;
24
25# section id 1116, allow accessing statsd socket
26unix_socket_send(incidentd, statsdw, statsd)
27
28# section id 2001, allow reading /proc/pagetypeinfo
29allow incidentd proc_pagetypeinfo:file r_file_perms;
30
31# section id 2002, allow reading /d/wakeup_sources
32no_debugfs_restriction(`
33  allow incidentd debugfs_wakeup_sources:file r_file_perms;
34')
35
36# section id 2003, allow executing top
37allow incidentd proc_meminfo:file { open read };
38
39# section id 2004, allow reading /sys/devices/system/cpu/cpufreq/all_time_in_state
40allow incidentd sysfs_devices_system_cpu:file r_file_perms;
41
42# section id 2005, allow reading ps dump in full
43allow incidentd domain:process getattr;
44
45# section id 2006, allow reading /sys/class/power_supply/bms/battery_type
46allow incidentd sysfs_batteryinfo:dir { search };
47allow incidentd sysfs_batteryinfo:file r_file_perms;
48
49# section id 2007, allow reading LAST_KMSG /sys/fs/pstore/console-ramoops
50userdebug_or_eng(`allow incidentd pstorefs:dir search');
51userdebug_or_eng(`allow incidentd pstorefs:file r_file_perms');
52
53# section id 3023, allow obtaining stats report
54allow incidentd stats_service:service_manager find;
55binder_call(incidentd, statsd)
56
57# section id 3026, allow reading /data/misc/perfetto-traces.
58allow incidentd perfetto_traces_data_file:dir r_dir_perms;
59allow incidentd perfetto_traces_data_file:file r_file_perms;
60
61# section id 3052, allow accessing nfc_service
62allow incidentd nfc_service:service_manager find;
63
64# Create and write into /data/misc/incidents
65allow incidentd incident_data_file:dir rw_dir_perms;
66allow incidentd incident_data_file:file create_file_perms;
67
68# Enable incidentd to get stack traces.
69binder_use(incidentd)
70hwbinder_use(incidentd)
71allow incidentd hwservicemanager:hwservice_manager { list };
72get_prop(incidentd, hwservicemanager_prop)
73allow incidentd hidl_manager_hwservice:hwservice_manager { find };
74
75# Read files in /proc
76allow incidentd {
77  proc_cmdline
78  proc_pid_max
79  proc_pipe_conf
80  proc_stat
81}:file r_file_perms;
82
83# Signal java processes to dump their stack and get the results
84allow incidentd { appdomain ephemeral_app system_server }:process signal;
85
86# Signal native processes to dump their stack.
87# This list comes from native_processes_to_dump in incidentd/utils.c
88allow incidentd {
89  # This list comes from native_processes_to_dump in dumputils/dump_utils.cpp
90  audioserver
91  cameraserver
92  drmserver
93  inputflinger
94  mediadrmserver
95  mediaextractor
96  mediametrics
97  mediaserver
98  sdcardd
99  statsd
100  surfaceflinger
101
102  # This list comes from hal_interfaces_to_dump in dumputils/dump_utils.cpp
103  hal_audio_server
104  hal_bluetooth_server
105  hal_camera_server
106  hal_codec2_server
107  hal_face_server
108  hal_graphics_allocator_server
109  hal_graphics_composer_server
110  hal_health_server
111  hal_omx_server
112  hal_sensors_server
113  hal_vr_server
114}:process signal;
115
116# Allow incidentd to make binder calls to any binder service
117binder_call(incidentd, system_server)
118binder_call(incidentd, appdomain)
119
120# Reading /proc/PID/maps of other processes
121userdebug_or_eng(`allow incidentd self:global_capability_class_set { sys_ptrace }');
122# incidentd has capability sys_ptrace, but should only use that capability for
123# accessing sensitive /proc/PID files, never for using ptrace attach.
124neverallow incidentd *:process ptrace;
125
126allow incidentd self:global_capability_class_set {
127    # Send signals to processes
128    kill
129};
130
131# Connect to tombstoned to intercept dumps.
132unix_socket_connect(incidentd, tombstoned_intercept, tombstoned)
133
134# Run a shell.
135allow incidentd shell_exec:file rx_file_perms;
136
137# For running am, incident-helper-cmd and similar framework commands.
138# Run /system/bin/app_process.
139allow incidentd zygote_exec:file { rx_file_perms };
140# Access the runtime feature flag properties.
141get_prop(incidentd, device_config_runtime_native_prop)
142get_prop(incidentd, device_config_runtime_native_boot_prop)
143# Access odsign verification status.
144get_prop(incidentd, odsign_prop)
145# ART locks profile files.
146allow incidentd system_file:file lock;
147# Incidentd should never exec from the memory (e.g. JIT cache). These denials are expected.
148dontaudit incidentd dalvikcache_data_file:dir r_dir_perms;
149dontaudit incidentd apex_module_data_file:dir r_dir_perms;
150dontaudit incidentd apex_art_data_file:dir r_dir_perms;
151dontaudit incidentd tmpfs:file rwx_file_perms;
152
153# logd access - work to be done is a PII safe log (possibly an event log?)
154userdebug_or_eng(`read_logd(incidentd)')
155# TODO control_logd(incidentd)
156
157# Access /data/misc/logd
158r_dir_file(incidentd, misc_logd_file)
159
160# Allow incidentd to find these standard groups of services.
161# Others can be allowlisted individually.
162allow incidentd {
163  system_server_service
164  app_api_service
165  system_api_service
166  -tracingproxy_service
167}:service_manager find;
168
169# Only incidentd can publish the binder service
170add_service(incidentd, incident_service)
171
172# Allow pipes only from dumpstate and incident
173allow incidentd { dumpstate incident }:fd use;
174allow incidentd { dumpstate incident }:fifo_file write;
175
176# Allow incident to call back to incident with status updates.
177binder_call(incidentd, incident)
178
179# Read device serial number from system properties
180# This is used to track reports from lab testing devices
181userdebug_or_eng(`
182  get_prop(incidentd, serialno_prop)
183')
184
185# Read ro.boot.bootreason, persist.sys.boot.bootreason
186# This is used to track reports from lab testing devices
187userdebug_or_eng(`
188  get_prop(incidentd, bootloader_boot_reason_prop);
189  get_prop(incidentd, system_boot_reason_prop);
190  get_prop(incidentd, last_boot_reason_prop);
191')
192
193###
194### neverallow rules
195###
196# only incidentd and the other root services in limited circumstances
197# can get to the files in /data/misc/incidents
198#
199# write, execute, append are forbidden almost everywhere
200neverallow { domain -incidentd -init -vold } incident_data_file:file {
201  w_file_perms
202  x_file_perms
203  create
204  rename
205  setattr
206  unlink
207  append
208};
209# read is also allowed by system_server, for when the file is handed to dropbox
210neverallow { domain -incidentd -init -vold -system_server } incident_data_file:file r_file_perms;
211# limited access to the directory itself
212neverallow { domain -incidentd -init -vold } incident_data_file:dir create_dir_perms;
213
214