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# Create and write into /data/misc/incidents
53allow incidentd incident_data_file:dir rw_dir_perms;
54allow incidentd incident_data_file:file create_file_perms;
55
56# Enable incidentd to get stack traces.
57binder_use(incidentd)
58hwbinder_use(incidentd)
59allow incidentd hwservicemanager:hwservice_manager { list };
60get_prop(incidentd, hwservicemanager_prop)
61allow incidentd hidl_manager_hwservice:hwservice_manager { find };
62
63# Read files in /proc
64allow incidentd {
65  proc_cmdline
66  proc_pipe_conf
67  proc_stat
68}:file r_file_perms;
69
70# Signal java processes to dump their stack and get the results
71allow incidentd { appdomain ephemeral_app system_server }:process signal;
72
73# Signal native processes to dump their stack.
74# This list comes from native_processes_to_dump in incidentd/utils.c
75allow incidentd {
76  # This list comes from native_processes_to_dump in dumputils/dump_utils.cpp
77  audioserver
78  cameraserver
79  drmserver
80  inputflinger
81  mediadrmserver
82  mediaextractor
83  mediametrics
84  mediaserver
85  sdcardd
86  statsd
87  surfaceflinger
88
89  # This list comes from hal_interfaces_to_dump in dumputils/dump_utils.cpp
90  hal_audio_server
91  hal_bluetooth_server
92  hal_camera_server
93  hal_codec2_server
94  hal_face_server
95  hal_graphics_allocator_server
96  hal_graphics_composer_server
97  hal_health_server
98  hal_omx_server
99  hal_sensors_server
100  hal_vr_server
101}:process signal;
102
103# Allow incidentd to make binder calls to any binder service
104binder_call(incidentd, system_server)
105binder_call(incidentd, appdomain)
106
107# Reading /proc/PID/maps of other processes
108userdebug_or_eng(`allow incidentd self:global_capability_class_set { sys_ptrace }');
109# incidentd has capability sys_ptrace, but should only use that capability for
110# accessing sensitive /proc/PID files, never for using ptrace attach.
111neverallow incidentd *:process ptrace;
112
113allow incidentd self:global_capability_class_set {
114    # Send signals to processes
115    kill
116};
117
118# Connect to tombstoned to intercept dumps.
119unix_socket_connect(incidentd, tombstoned_intercept, tombstoned)
120
121# Run a shell.
122allow incidentd shell_exec:file rx_file_perms;
123
124# logd access - work to be done is a PII safe log (possibly an event log?)
125userdebug_or_eng(`read_logd(incidentd)')
126# TODO control_logd(incidentd)
127
128# Allow incidentd to find these standard groups of services.
129# Others can be allowlisted individually.
130allow incidentd {
131  system_server_service
132  app_api_service
133  system_api_service
134}:service_manager find;
135
136# Only incidentd can publish the binder service
137add_service(incidentd, incident_service)
138
139# Allow pipes only from dumpstate and incident
140allow incidentd { dumpstate incident }:fd use;
141allow incidentd { dumpstate incident }:fifo_file write;
142
143# Allow incident to call back to incident with status updates.
144binder_call(incidentd, incident)
145
146###
147### neverallow rules
148###
149
150# only dumpstate, system_server, system_app and incident command can find the incident service
151neverallow {
152  domain
153  -dumpstate
154  -incident
155  -incidentd
156  -priv_app
157  -statsd
158  -system_app
159  -system_server
160} incident_service:service_manager find;
161
162# only incidentd and the other root services in limited circumstances
163# can get to the files in /data/misc/incidents
164#
165# write, execute, append are forbidden almost everywhere
166neverallow { domain -incidentd -init -vold } incident_data_file:file {
167  w_file_perms
168  x_file_perms
169  create
170  rename
171  setattr
172  unlink
173  append
174};
175# read is also allowed by system_server, for when the file is handed to dropbox
176neverallow { domain -incidentd -init -vold -system_server } incident_data_file:file r_file_perms;
177# limited access to the directory itself
178neverallow { domain -incidentd -init -vold } incident_data_file:dir create_dir_perms;
179
180