PWN-Hunter/android_system_sepolicy
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cameraserver: Build up least privileged policy

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Remove all permissions not observed during testing.

Remove domain_deprecated.

Bug: 26982110
Change-Id: I33f1887c95bdf378c945319494378225b41db215
This commit is contained in:
Jeff Vander Stoep 2016-02-05 14:17:22 -08:00 committed by Chien-Yu Chen
parent 66855fcaf3
commit 4541687be5
6 changed files with 9 additions and 96 deletions
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1
bluetooth.te
View File

@ -37,7 +37,6 @@ set_prop(bluetooth, ctl_dhcp_pan_prop)
allow bluetooth audioserver_service:service_manager find;
allow bluetooth bluetooth_service:service_manager find;
allow bluetooth cameraserver_service:service_manager find;
allow bluetooth drmserver_service:service_manager find;
allow bluetooth mediaserver_service:service_manager find;
allow bluetooth radio_service:service_manager find;

99
cameraserver.te
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@ -1,116 +1,35 @@
# cameraserver - camera daemon
type cameraserver, domain, domain_deprecated;
type cameraserver, domain;
type cameraserver_exec, exec_type, file_type;
typeattribute cameraserver mlstrustedsubject;
# STOPSHIP. cameraserver into permissive mode to collect denials from
# droidfooders
permissive cameraserver;
net_domain(cameraserver)
init_daemon_domain(cameraserver)
r_dir_file(cameraserver, sdcard_type)
binder_use(cameraserver)
binder_call(cameraserver, binderservicedomain)
binder_call(cameraserver, appdomain)
binder_service(cameraserver)
# Required by Widevine DRM (b/22990512)
allow cameraserver self:process execmem;
allow cameraserver kernel:system module_request;
allow cameraserver media_data_file:dir create_dir_perms;
allow cameraserver media_data_file:file create_file_perms;
# access /data/misc/camera
allow cameraserver camera_data_file:dir create_dir_perms;
allow cameraserver camera_data_file:file create_file_perms;
allow cameraserver app_data_file:dir search;
allow cameraserver app_data_file:file rw_file_perms;
allow cameraserver sdcard_type:file write;
allow cameraserver gpu_device:chr_file rw_file_perms;
allow cameraserver video_device:dir r_dir_perms;
allow cameraserver video_device:chr_file rw_file_perms;
allow cameraserver audio_device:dir r_dir_perms;
allow cameraserver tee_device:chr_file rw_file_perms;
allow cameraserver ion_device:chr_file rw_file_perms;
set_prop(cameraserver, audio_prop)
# Access audio devices at all.
allow cameraserver audio_device:chr_file rw_file_perms;
# XXX Label with a specific type?
allow cameraserver sysfs:file r_file_perms;
# Read resources from open apk files passed over Binder.
allow cameraserver apk_data_file:file { read getattr };
allow cameraserver asec_apk_file:file { read getattr };
# Read /data/data/com.android.providers.telephony files passed over Binder.
allow cameraserver radio_data_file:file { read getattr };
# Use pipes passed over Binder from app domains.
allow cameraserver appdomain:fifo_file { getattr read write };
allow cameraserver rpmsg_device:chr_file rw_file_perms;
# Inter System processes communicate over named pipe (FIFO)
allow cameraserver system_server:fifo_file r_file_perms;
# Camera data
r_dir_file(cameraserver, camera_data_file)
r_dir_file(cameraserver, media_rw_data_file)
# Grant access to audio files to cameraserver
allow cameraserver audio_data_file:dir ra_dir_perms;
allow cameraserver audio_data_file:file create_file_perms;
# Read/[write] to /proc/net/xt_qtaguid/ctrl and /dev/xt_qtaguid
allow cameraserver qtaguid_proc:file rw_file_perms;
allow cameraserver qtaguid_device:chr_file r_file_perms;
# Allow abstract socket connection
allow cameraserver rild:unix_stream_socket { connectto read write setopt };
# Needed on some devices for playing DRM protected content,
# but seems expected and appropriate for all devices.
unix_socket_connect(cameraserver, drmserver, drmserver)
# Needed on some devices for playing audio on paired BT device,
# but seems appropriate for all devices.
unix_socket_connect(cameraserver, bluetooth, bluetooth)
# Connect to tee service.
allow cameraserver tee:unix_stream_socket connectto;
allow cameraserver activity_service:service_manager find;
allow cameraserver appops_service:service_manager find;
allow cameraserver audioserver_service:service_manager find;
allow cameraserver cameraproxy_service:service_manager find;
allow cameraserver cameraserver_service:service_manager { add find };
allow cameraserver batterystats_service:service_manager find;
allow cameraserver drmserver_service:service_manager find;
allow cameraserver mediaextractor_service:service_manager find;
allow cameraserver cameraproxy_service:service_manager find;
allow cameraserver cameraserver_service:service_manager add;
allow cameraserver mediaserver_service:service_manager find;
allow cameraserver permission_service:service_manager find;
allow cameraserver power_service:service_manager find;
allow cameraserver processinfo_service:service_manager find;
allow cameraserver scheduling_policy_service:service_manager find;
allow cameraserver surfaceflinger_service:service_manager find;
# /oem access
allow cameraserver oemfs:dir search;
allow cameraserver oemfs:file r_file_perms;
use_drmservice(cameraserver)
allow cameraserver drmserver:drmservice {
consumeRights
setPlaybackStatus
openDecryptSession
closeDecryptSession
initializeDecryptUnit
decrypt
finalizeDecryptUnit
pread
};
###
### neverallow rules
###

1
mediaserver.te
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@ -90,7 +90,6 @@ allow mediaserver tee:unix_stream_socket connectto;
allow mediaserver activity_service:service_manager find;
allow mediaserver appops_service:service_manager find;
allow mediaserver audioserver_service:service_manager find;
allow mediaserver cameraserver_service:service_manager find;
allow mediaserver cameraproxy_service:service_manager find;
allow mediaserver batterystats_service:service_manager find;
allow mediaserver drmserver_service:service_manager find;

1
radio.te
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@ -28,7 +28,6 @@ auditallow radio system_radio_prop:property_service set;
set_prop(radio, ctl_rildaemon_prop)
allow radio audioserver_service:service_manager find;
allow radio cameraserver_service:service_manager find;
allow radio drmserver_service:service_manager find;
allow radio mediaserver_service:service_manager find;
allow radio radio_service:service_manager { add find };

1
surfaceflinger.te
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@ -54,7 +54,6 @@ allow surfaceflinger tee_device:chr_file rw_file_perms;
# media.player service
allow surfaceflinger audioserver_service:service_manager find;
allow surfaceflinger cameraserver_service:service_manager find;
allow surfaceflinger mediaserver_service:service_manager find;
allow surfaceflinger permission_service:service_manager find;
allow surfaceflinger power_service:service_manager find;

2
system_server.te
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@ -153,8 +153,6 @@ r_dir_file(system_server, inputflinger)
# Use sockets received over binder from various services.
allow system_server audioserver:tcp_socket rw_socket_perms;
allow system_server audioserver:udp_socket rw_socket_perms;
allow system_server cameraserver:tcp_socket rw_socket_perms;
allow system_server cameraserver:udp_socket rw_socket_perms;
allow system_server mediaserver:tcp_socket rw_socket_perms;
allow system_server mediaserver:udp_socket rw_socket_perms;