Add incident command and incidentd daemon se policy.

Test: adb shell incident
Bug: 31122534
Change-Id: I4ac9c9ab86867f09b63550707673149fe60f1906

private/file_contexts

@@ -178,6 +178,8 @@
 /system/bin/surfaceflinger	u:object_r:surfaceflinger_exec:s0
 /system/bin/drmserver	u:object_r:drmserver_exec:s0
 /system/bin/dumpstate   u:object_r:dumpstate_exec:s0
+/system/bin/incident   u:object_r:incident_exec:s0
+/system/bin/incidentd   u:object_r:incidentd_exec:s0
 /system/bin/vold	u:object_r:vold_exec:s0
 /system/bin/netd	u:object_r:netd_exec:s0
 /system/bin/wificond	u:object_r:wificond_exec:s0
@@ -329,6 +331,7 @@
 /data/misc/dhcp(/.*)?           u:object_r:dhcp_data_file:s0
 /data/misc/dhcp-6.8.2(/.*)?     u:object_r:dhcp_data_file:s0
 /data/misc/gatekeeper(/.*)?     u:object_r:gatekeeper_data_file:s0
+/data/misc/incidents(/.*)?	    u:object_r:incident_data_file:s0
 /data/misc/keychain(/.*)?       u:object_r:keychain_data_file:s0
 /data/misc/keystore(/.*)?       u:object_r:keystore_data_file:s0
 /data/misc/logd(/.*)?           u:object_r:misc_logd_file:s0

private/incident.te

+type incident_exec, exec_type, file_type;
+
+# switch to incident domain for incident command
+domain_auto_trans(shell, incident_exec, incident)
+
+# allow incident access to stdout from its parent shell.
+allow incident shell:fd use;
+
+# allow incident to communicate use, read and write over the adb
+# connection.
+allow incident adbd:fd use;
+allow incident adbd:unix_stream_socket { read write };
+
+# allow adbd to reap incident
+allow incident adbd:process { sigchld };
+
+# Allow the incident command to talk to the incidentd over the binder, and get
+# back the incident report data from a ParcelFileDescriptor.
+binder_use(incident)
+allow incident incident_service:service_manager find;
+binder_call(incident, incidentd)
+allow incident incidentd:fifo_file write;
+

private/incidentd.te

+init_daemon_domain(incidentd)
+type incidentd_exec, exec_type, file_type;
+binder_use(incidentd)
+wakelock_use(incidentd)
+
+# Allow setting process priority, protect from OOM killer, and dropping
+# privileges by switching UID / GID
+# TODO allow incidentd self:capability { setuid setgid sys_resource };
+
+# Allow incidentd to scan through /proc/pid for all processes
+r_dir_file(incidentd, domain)
+
+allow incidentd self:capability {
+    # Send signals to processes
+    kill
+};
+
+# Allow executing files on system, such as:
+#   /system/bin/toolbox
+#   /system/bin/logcat
+#   /system/bin/dumpsys
+allow incidentd system_file:file execute_no_trans;
+allow incidentd toolbox_exec:file rx_file_perms;
+
+# Create and write into /data/misc/incidents
+allow incidentd incident_data_file:dir rw_dir_perms;
+allow incidentd incident_data_file:file create_file_perms;
+
+# Get process attributes
+# TODO allow incidentd domain:process getattr;
+
+# Signal java processes to dump their stack and get the results
+# TODO allow incidentd { appdomain ephemeral_app system_server }:process signal;
+# TODO allow incidentd anr_data_file:dir rw_dir_perms;
+# TODO allow incidentd anr_data_file:file create_file_perms;
+
+# Signal native processes to dump their stack.
+# This list comes from native_processes_to_dump in incidentd/utils.c
+allow incidentd {
+  audioserver
+  cameraserver
+  drmserver
+  inputflinger
+  mediacodec
+  mediadrmserver
+  mediaextractor
+  mediaserver
+  sdcardd
+  surfaceflinger
+}:process signal;
+
+# Allow incidentd to make binder calls to any binder service
+binder_call(incidentd, binderservicedomain)
+binder_call(incidentd, appdomain)
+
+# Reading /proc/PID/maps of other processes
+# TODO allow incidentd self:capability sys_ptrace;
+
+# Run a shell.
+allow incidentd shell_exec:file rx_file_perms;
+
+# logd access - work to be done is a PII safe log (possibly an event log?)
+# TODO read_logd(incidentd)
+# TODO control_logd(incidentd)
+
+# Allow incidentd to find these standard groups of services.
+# Others can be whitelisted individually.
+allow incidentd {
+  system_server_service
+  app_api_service
+  system_api_service
+}:service_manager find;
+
+# Only incidentd can publish the binder service
+add_service(incidentd, incident_service)
+
+# Allow pipes from (and only from) incident
+allow incidentd incident:fd use;
+allow incidentd incident:fifo_file write;
+
+# Allow incident to call back to incident with status updates.
+binder_call(incidentd, incident)
+
+###
+### neverallow rules
+###
+
+# only system_server, system_app and incident command can find the incident service
+neverallow { domain -system_server -system_app -incident -incidentd } incident_service:service_manager find;
+
+# only incidentd and the other root services in limited circumstances
+# can get to the files in /data/misc/incidents
+#
+# write, execute, append are forbidden almost everywhere
+neverallow { domain -incidentd -init -vold } incident_data_file:file {
+  w_file_perms
+  x_file_perms
+  create
+  rename
+  setattr
+  unlink
+  append
+};
+# read is also allowed by system_server, for when the file is handed to dropbox
+neverallow { domain -incidentd -init -vold -system_server } incident_data_file:file r_file_perms;
+# limited access to the directory itself
+neverallow { domain -incidentd -init -vold } incident_data_file:dir create_dir_perms;
+

private/service_contexts

@@ -56,6 +56,7 @@ gpu                                       u:object_r:gpu_service:s0
 hardware                                  u:object_r:hardware_service:s0
 hardware_properties                       u:object_r:hardware_properties_service:s0
 hdmi_control                              u:object_r:hdmi_control_service:s0
+incident                                  u:object_r:incident_service:s0
 inputflinger                              u:object_r:inputflinger_service:s0
 input_method                              u:object_r:input_method_service:s0
 input                                     u:object_r:input_service:s0

private/su.te

@@ -8,6 +8,9 @@ userdebug_or_eng(`
   # from the "init" domain.
   domain_auto_trans(su, dumpstate_exec, dumpstate)
 
+  # Put the incident command into its domain so it is the same on user, userdebug and eng.
+  domain_auto_trans(su, incident_exec, incident)
+
 # su is also permissive to permit setenforce.
   permissive su;
 

private/system_app.te

@@ -51,6 +51,9 @@ allow system_app anr_data_file:file create_file_perms;
 # Settings need to access app name and icon from asec
 allow system_app asec_apk_file:file r_file_perms;
 
+# Allow system apps to interact with incidentd
+binder_call(system_app, incidentd)
+
 allow system_app servicemanager:service_manager list;
 # TODO: scope this down? Too broad?
 allow system_app { service_manager_type -netd_service -dumpstate_service -installd_service }:service_manager find;

private/system_server.te

@@ -172,6 +172,7 @@ binder_call(system_server, fingerprintd)
 binder_call(system_server, hal_fingerprint)
 binder_call(system_server, gatekeeperd)
 binder_call(system_server, installd)
+binder_call(system_server, incidentd)
 binder_call(system_server, netd)
 binder_call(system_server, wificond)
 binder_service(system_server)
@@ -295,6 +296,10 @@ allow system_server asec_public_file:file create_file_perms;
 allow system_server anr_data_file:dir create_dir_perms;
 allow system_server anr_data_file:file create_file_perms;
 
+# Read /data/misc/incidents - only read. The fd will be sent over binder,
+# with no DAC access to it, for dropbox to read.
+allow system_server incident_data_file:file read;
+
 # Manage /data/backup.
 allow system_server backup_data_file:dir create_dir_perms;
 allow system_server backup_data_file:file create_file_perms;
@@ -498,6 +503,7 @@ allow system_server dumpstate_service:service_manager find;
 allow system_server fingerprintd_service:service_manager find;
 allow system_server hal_fingerprint_service:service_manager find;
 allow system_server gatekeeper_service:service_manager find;
+allow system_server incident_service:service_manager find;
 allow system_server installd_service:service_manager find;
 allow system_server keystore_service:service_manager find;
 allow system_server mediaserver_service:service_manager find;

public/binderservicedomain.te

 # Rules common to all binder service domains
 
-# Allow dumpstate to collect information from binder services
-allow binderservicedomain dumpstate:fd use;
-allow binderservicedomain dumpstate:unix_stream_socket { read write getopt getattr };
-allow binderservicedomain dumpstate:fifo_file  { getattr write };
+# Allow dumpstate and incidentd to collect information from binder services
+allow binderservicedomain { dumpstate incidentd }:fd use;
+allow binderservicedomain { dumpstate incidentd }:unix_stream_socket { read write getopt getattr };
+allow binderservicedomain { dumpstate incidentd }:fifo_file  { getattr write };
 allow binderservicedomain shell_data_file:file { getattr write };
 
 # Allow dumpsys to work from adb shell or the serial console

public/dumpstate.te

@@ -167,7 +167,7 @@ userdebug_or_eng(`
   allow dumpstate misc_logd_file:file r_file_perms;
 ')
 
-allow dumpstate { service_manager_type -gatekeeper_service -dumpstate_service }:service_manager find;
+allow dumpstate { service_manager_type -gatekeeper_service -dumpstate_service -incident_service }:service_manager find;
 allow dumpstate servicemanager:service_manager list;
 
 allow dumpstate devpts:chr_file rw_file_perms;

public/file.te

@@ -157,6 +157,7 @@ type bootstat_data_file, file_type, data_file_type;
 type boottrace_data_file, file_type, data_file_type;
 type camera_data_file, file_type, data_file_type;
 type gatekeeper_data_file, file_type, data_file_type;
+type incident_data_file, file_type, data_file_type;
 type keychain_data_file, file_type, data_file_type;
 type keystore_data_file, file_type, data_file_type;
 type media_data_file, file_type, data_file_type;

public/incident.te

+# The incident command is used to call into the incidentd service to
+# take an incident report (binary, shared bugreport), download incident
+# reports that have already been taken, and monitor for new ones.
+# It doesn't do anything else.
+
+# incident
+type incident, domain;
+

public/incidentd.te

+# incidentd
+type incidentd, domain;
+

public/service.te

@@ -10,6 +10,7 @@ type hal_fingerprint_service,   service_manager_type;
 type gatekeeper_service,        app_api_service, service_manager_type;
 type gpu_service,               service_manager_type;
 type inputflinger_service,      service_manager_type;
+type incident_service,          service_manager_type;
 type installd_service,          service_manager_type;
 type keystore_service,          service_manager_type;
 type mediaserver_service,       service_manager_type;

public/shell.te

@@ -82,7 +82,7 @@ allow shell servicemanager:service_manager list;
 # don't allow shell to access GateKeeper service
 # TODO: why is this so broad? Tightening candidate? It needs at list:
 # - dumpstate_service (so it can receive dumpstate progress updates)
-allow shell { service_manager_type -gatekeeper_service -netd_service -installd_service}:service_manager find;
+allow shell { service_manager_type -gatekeeper_service -incident_service -installd_service -netd_service }:service_manager find;
 allow shell dumpstate:binder call;
 
 # allow shell to get information from hwservicemanager