PWN-Hunter/android_system_sepolicy
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Added permissions for the dumpstate service.

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- Allow dumpstate to create the dumpservice service.
- Allow System Server and Shell to find that service.
- Don't allow anyone else to create that service.
- Don't allow anyone else to find that service.

BUG: 31636879
Test: manual verification
Change-Id: I642fe873560a2b123e6bafde645467d45a5f5711
This commit is contained in:
Felipe Leme 2016-10-28 15:52:15 -07:00
parent 184851a212
commit b5f5931e8c
6 changed files with 23 additions and 3 deletions
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1
private/service_contexts
View File

@ -43,6 +43,7 @@ DockObserver u:object_r:DockObserver_service:s0
dreams u:object_r:dreams_service:s0
drm.drmManager u:object_r:drmserver_service:s0
dropbox u:object_r:dropbox_service:s0
dumpstate u:object_r:dumpstate_service:s0
ethernet u:object_r:ethernet_service:s0
fingerprint u:object_r:fingerprint_service:s0
android.hardware.fingerprint.IFingerprintDaemon u:object_r:fingerprintd_service:s0

15
public/dumpstate.te
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@ -174,7 +174,7 @@ userdebug_or_eng(`
allow dumpstate misc_logd_file:file r_file_perms;
')
allow dumpstate { service_manager_type -gatekeeper_service }:service_manager find;
allow dumpstate { service_manager_type -gatekeeper_service -dumpstate_service }:service_manager find;
allow dumpstate servicemanager:service_manager list;
allow dumpstate devpts:chr_file rw_file_perms;
@ -197,3 +197,16 @@ allow dumpstate atrace_exec:file rx_file_perms;
allow dumpstate media_rw_data_file:dir getattr;
allow dumpstate proc_interrupts:file r_file_perms;
allow dumpstate proc_zoneinfo:file r_file_perms;
# Create a service for talking back to system_server
allow dumpstate dumpstate_service:service_manager add;
###
### neverallow rules
###
# only dumpstate can add the dumpstate service
neverallow { domain -dumpstate } dumpstate_service:service_manager add;
# only system_server and shell can find the dumpstate service
neverallow { domain -system_server -shell } dumpstate_service:service_manager find;

1
public/service.te
View File

@ -3,6 +3,7 @@ type bluetooth_service, service_manager_type;
type cameraserver_service, service_manager_type;
type default_android_service, service_manager_type;
type drmserver_service, service_manager_type;
type dumpstate_service, service_manager_type;
type gatekeeper_service, app_api_service, service_manager_type;
type fingerprintd_service, service_manager_type;
type batteryproperties_service, app_api_service, service_manager_type;

5
public/shell.te
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@ -91,7 +91,10 @@ allow shell kernel:system syslog_read;
# allow shell access to services
allow shell servicemanager:service_manager list;
# don't allow shell to access GateKeeper service
allow shell { service_manager_type -gatekeeper_service -netd_service }:service_manager find;
# 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}:service_manager find;
allow shell dumpstate:binder call;
# allow shell to look through /proc/ for ps, top, netstat
r_dir_file(shell, proc)

3
public/system_app.te
View File

@ -49,7 +49,8 @@ allow system_app anr_data_file:file create_file_perms;
allow system_app asec_apk_file:file r_file_perms;
allow system_app servicemanager:service_manager list;
allow system_app { service_manager_type -netd_service }:service_manager find;
# TODO: scope this down? Too broad?
allow system_app { service_manager_type -netd_service -dumpstate_service }:service_manager find;
allow system_app keystore:keystore_key {
get_state

1
public/system_server.te
View File

@ -443,6 +443,7 @@ allow system_server sysfs_zram:file r_file_perms;
allow system_server audioserver_service:service_manager find;
allow system_server cameraserver_service:service_manager find;
allow system_server drmserver_service:service_manager find;
allow system_server dumpstate_service:service_manager find;
allow system_server batteryproperties_service:service_manager find;
allow system_server keystore_service:service_manager find;
allow system_server gatekeeper_service:service_manager find;