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