typeattribute incidentd coredomain;
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typeattribute incidentd mlstrustedsubject;
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init_daemon_domain(incidentd)
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type incidentd_exec, system_file_type, exec_type, file_type;
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binder_use(incidentd)
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wakelock_use(incidentd)
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# Allow incidentd to scan through /proc/pid for all processes
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r_dir_file(incidentd, domain)
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# Allow incidentd to kill incident_helper when timeout
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allow incidentd incident_helper:process sigkill;
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# Allow executing files on system, such as:
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# /system/bin/toolbox
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# /system/bin/logcat
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# /system/bin/dumpsys
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allow incidentd system_file:file execute_no_trans;
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allow incidentd toolbox_exec:file rx_file_perms;
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# section id 1002, allow reading kernel version /proc/version
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allow incidentd proc_version:file r_file_perms;
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# section id 2001, allow reading /proc/pagetypeinfo
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allow incidentd proc_pagetypeinfo:file r_file_perms;
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# section id 2002, allow reading /d/wakeup_sources
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allow incidentd debugfs_wakeup_sources:file r_file_perms;
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# section id 2003, allow executing top
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allow incidentd proc_meminfo:file { open read };
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# section id 2004, allow reading /sys/devices/system/cpu/cpufreq/all_time_in_state
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allow incidentd sysfs_devices_system_cpu:file r_file_perms;
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# section id 2005, allow reading ps dump in full
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allow incidentd domain:process getattr;
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# section id 2006, allow reading /sys/class/power_supply/bms/battery_type
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allow incidentd sysfs_batteryinfo:dir { search };
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allow incidentd sysfs_batteryinfo:file r_file_perms;
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# section id 2007, allow reading LAST_KMSG /sys/fs/pstore/console-ramoops
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userdebug_or_eng(`allow incidentd pstorefs:dir search');
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userdebug_or_eng(`allow incidentd pstorefs:file r_file_perms');
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# section id 3023, allow obtaining stats report
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allow incidentd stats_service:service_manager find;
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binder_call(incidentd, statsd)
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# section id 3026, allow reading /data/misc/perfetto-traces.
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# TODO(b/134706389): remove when no longer used.
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userdebug_or_eng(`
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allow incidentd perfetto_traces_data_file:dir r_dir_perms;
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allow incidentd perfetto_traces_data_file:file r_file_perms;
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');
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# Create and write into /data/misc/incidents
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allow incidentd incident_data_file:dir rw_dir_perms;
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allow incidentd incident_data_file:file create_file_perms;
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# Enable incidentd to get stack traces.
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binder_use(incidentd)
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hwbinder_use(incidentd)
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allow incidentd hwservicemanager:hwservice_manager { list };
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get_prop(incidentd, hwservicemanager_prop)
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allow incidentd hidl_manager_hwservice:hwservice_manager { find };
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# Read files in /proc
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allow incidentd {
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proc_cmdline
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proc_pipe_conf
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proc_stat
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}:file r_file_perms;
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# Signal java processes to dump their stack and get the results
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allow incidentd { appdomain ephemeral_app system_server }:process signal;
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# Signal native processes to dump their stack.
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# This list comes from native_processes_to_dump in incidentd/utils.c
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allow incidentd {
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# This list comes from native_processes_to_dump in dumputils/dump_utils.cpp
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audioserver
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cameraserver
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drmserver
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inputflinger
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mediadrmserver
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mediaextractor
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mediametrics
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mediaserver
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sdcardd
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statsd
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surfaceflinger
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# This list comes from hal_interfaces_to_dump in dumputils/dump_utils.cpp
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hal_audio_server
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hal_bluetooth_server
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hal_camera_server
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hal_codec2_server
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hal_face_server
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hal_graphics_allocator_server
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hal_graphics_composer_server
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hal_health_server
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hal_omx_server
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hal_sensors_server
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hal_vr_server
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}:process signal;
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# Allow incidentd to make binder calls to any binder service
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binder_call(incidentd, system_server)
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binder_call(incidentd, appdomain)
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# Reading /proc/PID/maps of other processes
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userdebug_or_eng(`allow incidentd self:global_capability_class_set { sys_ptrace }');
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# incidentd has capability sys_ptrace, but should only use that capability for
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# accessing sensitive /proc/PID files, never for using ptrace attach.
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neverallow incidentd *:process ptrace;
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allow incidentd self:global_capability_class_set {
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# Send signals to processes
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kill
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};
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# Connect to tombstoned to intercept dumps.
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unix_socket_connect(incidentd, tombstoned_intercept, tombstoned)
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# Run a shell.
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allow incidentd shell_exec:file rx_file_perms;
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# logd access - work to be done is a PII safe log (possibly an event log?)
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userdebug_or_eng(`read_logd(incidentd)')
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# TODO control_logd(incidentd)
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# Allow incidentd to find these standard groups of services.
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# Others can be whitelisted individually.
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allow incidentd {
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system_server_service
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app_api_service
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system_api_service
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}:service_manager find;
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# Only incidentd can publish the binder service
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add_service(incidentd, incident_service)
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# Allow pipes only from dumpstate and incident
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allow incidentd { dumpstate incident }:fd use;
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allow incidentd { dumpstate incident }:fifo_file write;
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# Allow incident to call back to incident with status updates.
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binder_call(incidentd, incident)
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###
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### neverallow rules
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###
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# only specific domains can find the incident service
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# TODO(b/134706389): remove "perfetto" when no longer used.
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neverallow {
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domain
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-dumpstate
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-incident
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-incidentd
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userdebug_or_eng(`-perfetto')
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-priv_app
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-statsd
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-system_app
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-system_server
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} incident_service:service_manager find;
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# only incidentd and the other root services in limited circumstances
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# can get to the files in /data/misc/incidents
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#
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# write, execute, append are forbidden almost everywhere
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neverallow { domain -incidentd -init -vold } incident_data_file:file {
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w_file_perms
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x_file_perms
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create
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rename
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setattr
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unlink
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append
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};
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# read is also allowed by system_server, for when the file is handed to dropbox
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neverallow { domain -incidentd -init -vold -system_server } incident_data_file:file r_file_perms;
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# limited access to the directory itself
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neverallow { domain -incidentd -init -vold } incident_data_file:dir create_dir_perms;
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