1 typeattribute incidentd coredomain; 2 typeattribute incidentd mlstrustedsubject; 3 4 init_daemon_domain(incidentd) 5 type incidentd_exec, exec_type, file_type; 6 binder_use(incidentd) 7 wakelock_use(incidentd) 8 9 # Allow incidentd to scan through /proc/pid for all processes 10 r_dir_file(incidentd, domain) 11 12 # Allow incidentd to kill incident_helper when timeout 13 allow 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 19 allow incidentd system_file:file execute_no_trans; 20 allow incidentd toolbox_exec:file rx_file_perms; 21 22 # section id 2001, allow reading /proc/pagetypeinfo 23 allow incidentd proc_pagetypeinfo:file r_file_perms; 24 25 # section id 2002, allow reading /d/wakeup_sources 26 allow incidentd debugfs_wakeup_sources:file r_file_perms; 27 28 # section id 2003, allow executing top 29 allow incidentd proc_meminfo:file { open read }; 30 31 # section id 2004, allow reading /sys/devices/system/cpu/cpufreq/all_time_in_state 32 allow incidentd sysfs_devices_system_cpu:file r_file_perms; 33 34 # section id 2005, allow reading ps dump in full 35 allow incidentd domain:process getattr; 36 37 # section id 2006, allow reading /sys/class/power_supply/bms/battery_type 38 allow incidentd sysfs_batteryinfo:dir { search }; 39 allow incidentd sysfs_batteryinfo:file r_file_perms; 40 41 # section id 2007, allow reading LAST_KMSG /sys/fs/pstore/console-ramoops 42 userdebug_or_eng(`allow incidentd pstorefs:dir search'); 43 userdebug_or_eng(`allow incidentd pstorefs:file r_file_perms'); 44 45 # Create and write into /data/misc/incidents 46 allow incidentd incident_data_file:dir rw_dir_perms; 47 allow incidentd incident_data_file:file create_file_perms; 48 49 # Enable incidentd to get stack traces. 50 binder_use(incidentd) 51 hwbinder_use(incidentd) 52 allow incidentd hwservicemanager:hwservice_manager { list }; 53 get_prop(incidentd, hwservicemanager_prop) 54 allow incidentd hidl_manager_hwservice:hwservice_manager { find }; 55 56 # Read files in /proc 57 allow incidentd { 58 proc_cmdline 59 proc_pipe_conf 60 proc_stat 61 }:file r_file_perms; 62 63 # Signal java processes to dump their stack and get the results 64 allow incidentd { appdomain ephemeral_app system_server }:process signal; 65 66 # Signal native processes to dump their stack. 67 # This list comes from native_processes_to_dump in incidentd/utils.c 68 allow incidentd { 69 # This list comes from native_processes_to_dump in dumputils/dump_utils.cpp 70 audioserver 71 cameraserver 72 drmserver 73 inputflinger 74 mediadrmserver 75 mediaextractor 76 mediametrics 77 mediaserver 78 sdcardd 79 statsd 80 surfaceflinger 81 82 # This list comes from hal_interfaces_to_dump in dumputils/dump_utils.cpp 83 hal_audio_server 84 hal_bluetooth_server 85 hal_camera_server 86 hal_graphics_composer_server 87 hal_sensors_server 88 hal_vr_server 89 mediacodec # TODO(b/36375899): hal_omx_server 90 }:process signal; 91 92 # Allow incidentd to make binder calls to any binder service 93 binder_call(incidentd, system_server) 94 binder_call(incidentd, appdomain) 95 96 # Reading /proc/PID/maps of other processes 97 userdebug_or_eng(`allow incidentd self:global_capability_class_set { sys_ptrace }'); 98 # incidentd has capability sys_ptrace, but should only use that capability for 99 # accessing sensitive /proc/PID files, never for using ptrace attach. 100 neverallow incidentd *:process ptrace; 101 102 allow incidentd self:global_capability_class_set { 103 # Send signals to processes 104 kill 105 }; 106 107 # Connect to tombstoned to intercept dumps. 108 unix_socket_connect(incidentd, tombstoned_intercept, tombstoned) 109 110 # Run a shell. 111 allow incidentd shell_exec:file rx_file_perms; 112 113 # logd access - work to be done is a PII safe log (possibly an event log?) 114 userdebug_or_eng(`read_logd(incidentd)') 115 # TODO control_logd(incidentd) 116 117 # Allow incidentd to find these standard groups of services. 118 # Others can be whitelisted individually. 119 allow incidentd { 120 system_server_service 121 app_api_service 122 system_api_service 123 }:service_manager find; 124 125 # Only incidentd can publish the binder service 126 add_service(incidentd, incident_service) 127 128 # Allow pipes from (and only from) incident 129 allow incidentd incident:fd use; 130 allow incidentd incident:fifo_file write; 131 132 # Allow incident to call back to incident with status updates. 133 binder_call(incidentd, incident) 134 135 ### 136 ### neverallow rules 137 ### 138 139 # only system_server, system_app and incident command can find the incident service 140 neverallow { 141 domain 142 -incident 143 -incidentd 144 -statsd 145 -system_app 146 -system_server 147 } incident_service:service_manager find; 148 149 # only incidentd and the other root services in limited circumstances 150 # can get to the files in /data/misc/incidents 151 # 152 # write, execute, append are forbidden almost everywhere 153 neverallow { domain -incidentd -init -vold } incident_data_file:file { 154 w_file_perms 155 x_file_perms 156 create 157 rename 158 setattr 159 unlink 160 append 161 }; 162 # read is also allowed by system_server, for when the file is handed to dropbox 163 neverallow { domain -incidentd -init -vold -system_server } incident_data_file:file r_file_perms; 164 # limited access to the directory itself 165 neverallow { domain -incidentd -init -vold } incident_data_file:dir create_dir_perms; 166 167
