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 32userdebug_or_eng(`allow incidentd debugfs_wakeup_sources:file r_file_perms'); 33 34# section id 2003, allow executing top 35allow incidentd proc_meminfo:file { open read }; 36 37# section id 2004, allow reading /sys/devices/system/cpu/cpufreq/all_time_in_state 38allow incidentd sysfs_devices_system_cpu:file r_file_perms; 39 40# section id 2005, allow reading ps dump in full 41allow incidentd domain:process getattr; 42 43# section id 2006, allow reading /sys/class/power_supply/bms/battery_type 44allow incidentd sysfs_batteryinfo:dir { search }; 45allow incidentd sysfs_batteryinfo:file r_file_perms; 46 47# section id 2007, allow reading LAST_KMSG /sys/fs/pstore/console-ramoops 48userdebug_or_eng(`allow incidentd pstorefs:dir search'); 49userdebug_or_eng(`allow incidentd pstorefs:file r_file_perms'); 50 51# section id 3023, allow obtaining stats report 52allow incidentd stats_service:service_manager find; 53binder_call(incidentd, statsd) 54 55# section id 3026, allow reading /data/misc/perfetto-traces. 56allow incidentd perfetto_traces_data_file:dir r_dir_perms; 57allow incidentd perfetto_traces_data_file:file r_file_perms; 58 59# section id 3052, allow accessing nfc_service 60allow incidentd nfc_service:service_manager find; 61 62# Create and write into /data/misc/incidents 63allow incidentd incident_data_file:dir rw_dir_perms; 64allow incidentd incident_data_file:file create_file_perms; 65 66# Enable incidentd to get stack traces. 67binder_use(incidentd) 68hwbinder_use(incidentd) 69allow incidentd hwservicemanager:hwservice_manager { list }; 70get_prop(incidentd, hwservicemanager_prop) 71allow incidentd hidl_manager_hwservice:hwservice_manager { find }; 72 73# Read files in /proc 74allow incidentd { 75 proc_cmdline 76 proc_pid_max 77 proc_pipe_conf 78 proc_stat 79}:file r_file_perms; 80 81# Signal java processes to dump their stack and get the results 82allow incidentd { appdomain ephemeral_app system_server }:process signal; 83 84# Signal native processes to dump their stack. 85# This list comes from native_processes_to_dump in incidentd/utils.c 86allow incidentd { 87 # This list comes from native_processes_to_dump in dumputils/dump_utils.cpp 88 audioserver 89 cameraserver 90 drmserver 91 inputflinger 92 mediadrmserver 93 mediaextractor 94 mediametrics 95 mediaserver 96 sdcardd 97 statsd 98 surfaceflinger 99 100 # This list comes from hal_interfaces_to_dump in dumputils/dump_utils.cpp 101 hal_audio_server 102 hal_bluetooth_server 103 hal_camera_server 104 hal_codec2_server 105 hal_face_server 106 hal_graphics_allocator_server 107 hal_graphics_composer_server 108 hal_health_server 109 hal_omx_server 110 hal_sensors_server 111 hal_vr_server 112}:process signal; 113 114# Allow incidentd to make binder calls to any binder service 115binder_call(incidentd, system_server) 116binder_call(incidentd, appdomain) 117 118# Reading /proc/PID/maps of other processes 119userdebug_or_eng(`allow incidentd self:global_capability_class_set { sys_ptrace }'); 120# incidentd has capability sys_ptrace, but should only use that capability for 121# accessing sensitive /proc/PID files, never for using ptrace attach. 122neverallow incidentd *:process ptrace; 123 124allow incidentd self:global_capability_class_set { 125 # Send signals to processes 126 kill 127}; 128 129# Connect to tombstoned to intercept dumps. 130unix_socket_connect(incidentd, tombstoned_intercept, tombstoned) 131 132# Run a shell. 133allow incidentd shell_exec:file rx_file_perms; 134 135# For running am, incident-helper-cmd and similar framework commands. 136# Run /system/bin/app_process. 137allow incidentd zygote_exec:file { rx_file_perms }; 138# Access the runtime feature flag properties. 139get_prop(incidentd, device_config_runtime_native_prop) 140get_prop(incidentd, device_config_runtime_native_boot_prop) 141# Access odsign verification status. 142get_prop(incidentd, odsign_prop) 143# ART locks profile files. 144allow incidentd system_file:file lock; 145# Incidentd should never exec from the memory (e.g. JIT cache). These denials are expected. 146dontaudit incidentd dalvikcache_data_file:dir r_dir_perms; 147dontaudit incidentd apex_module_data_file:dir r_dir_perms; 148dontaudit incidentd apex_art_data_file:dir r_dir_perms; 149dontaudit incidentd tmpfs:file rwx_file_perms; 150 151# Allow incidentd to read /apex/apex-info-list.xml 152allow incidentd apex_info_file:file r_file_perms; 153 154# logd access - work to be done is a PII safe log (possibly an event log?) 155userdebug_or_eng(`read_logd(incidentd)') 156# TODO control_logd(incidentd) 157 158# Access /data/misc/logd 159r_dir_file(incidentd, misc_logd_file) 160 161# Allow incidentd to find these standard groups of services. 162# Others can be allowlisted individually. 163allow incidentd { 164 system_server_service 165 app_api_service 166 system_api_service 167 -tracingproxy_service 168}:service_manager find; 169 170# Only incidentd can publish the binder service 171add_service(incidentd, incident_service) 172 173# Allow pipes only from dumpstate and incident 174allow incidentd { dumpstate incident }:fd use; 175allow incidentd { dumpstate incident }:fifo_file write; 176 177# Allow incident to call back to incident with status updates. 178binder_call(incidentd, incident) 179 180# Read device serial number from system properties 181# This is used to track reports from lab testing devices 182userdebug_or_eng(` 183 get_prop(incidentd, serialno_prop) 184') 185 186# Read ro.boot.bootreason, persist.sys.boot.bootreason 187# This is used to track reports from lab testing devices 188userdebug_or_eng(` 189 get_prop(incidentd, bootloader_boot_reason_prop); 190 get_prop(incidentd, system_boot_reason_prop); 191 get_prop(incidentd, last_boot_reason_prop); 192') 193 194# Allow incident to read the build properties for attestation feature 195get_prop(incidentd, build_attestation_prop); 196 197### 198### neverallow rules 199### 200# only incidentd and the other root services in limited circumstances 201# can get to the files in /data/misc/incidents 202# 203# write, execute, append are forbidden almost everywhere 204neverallow { domain -incidentd -init -vold } incident_data_file:file { 205 w_file_perms 206 x_file_perms 207 create 208 rename 209 setattr 210 unlink 211 append 212}; 213# read is also allowed by system_server, for when the file is handed to dropbox 214neverallow { domain -incidentd -init -vold -system_server } incident_data_file:file r_file_perms; 215# limited access to the directory itself 216neverallow { domain -incidentd -init -vold } incident_data_file:dir create_dir_perms; 217 218