Merge "Minimize public policy" into main

This commit is contained in:
Inseob Kim 2024-03-28 01:14:45 +00:00 committed by Gerrit Code Review
commit 5769fd90f2
258 changed files with 7018 additions and 7000 deletions

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@ -230,6 +230,11 @@ allow adbd apex_info_file:file r_file_perms;
allow adbd tombstone_data_file:dir r_dir_perms;
allow adbd tombstone_data_file:file r_file_perms;
# Access /data/local/tests.
allow adbd shell_test_data_file:dir create_dir_perms;
allow adbd shell_test_data_file:file create_file_perms;
allow adbd shell_test_data_file:lnk_file create_file_perms;
###
### Neverallow rules
###
@ -239,3 +244,7 @@ allow adbd tombstone_data_file:file r_file_perms;
# never want to see a transition from adbd to su (aka "adb root")
neverallow adbd { domain -crash_dump -shell }:process transition;
neverallow adbd { domain userdebug_or_eng(`-su') recovery_only(`-shell') }:process dyntransition;
# Only init is allowed to enter the adbd domain via exec()
neverallow { domain -init } adbd:process transition;
neverallow * adbd:process dyntransition;

View file

@ -2,4 +2,9 @@ userdebug_or_eng(`
typeattribute aidl_lazy_test_server coredomain;
init_daemon_domain(aidl_lazy_test_server)
binder_use(aidl_lazy_test_server)
binder_call(aidl_lazy_test_server, binderservicedomain)
add_service(aidl_lazy_test_server, aidl_lazy_test_service)
')

View file

@ -2,6 +2,9 @@ typeattribute apexd coredomain;
init_daemon_domain(apexd)
binder_use(apexd)
add_service(apexd, apex_service)
# Allow creating, reading and writing of APEX files/dirs in the APEX data dir
allow apexd apex_data_file:dir create_dir_perms;
allow apexd apex_data_file:file create_file_perms;
@ -166,33 +169,7 @@ get_prop(apexd, apexd_select_prop)
# Allow apexd to read apexd_payload_metadata_prop
get_prop(apexd, apexd_payload_metadata_prop)
neverallow { domain -apexd -init } apex_data_file:dir no_w_dir_perms;
neverallow { domain -apexd -init } apex_metadata_file:dir no_w_dir_perms;
neverallow { domain -apexd -init -kernel } apex_data_file:file no_w_file_perms;
neverallow { domain -apexd -init -kernel } apex_metadata_file:file no_w_file_perms;
neverallow { domain -apexd } apex_mnt_dir:lnk_file no_w_file_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_module_data_file:dir no_w_dir_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_module_data_file:file no_w_file_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_rollback_data_file:dir no_w_dir_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_rollback_data_file:file no_w_file_perms;
# only apexd can set apexd sysprop
set_prop(apexd, apexd_prop)
neverallow { domain -apexd -init } apexd_prop:property_service set;
# only apexd can write apex-info-list.xml
neverallow { domain -apexd } apex_info_file:file no_w_file_perms;
# Only apexd and init should be allowed to manage /apex mounts
# A note on otapreopt_chroot. It used to mount APEXes during postainstall stage of A/B OTAs,
# but starting from S it just calls into apexd to prepare /apex for otapreoprt. Once the sepolicies
# around otapreopt_chroot are cleaned up we should be able to remove it from the lists below.
# dexopt_chroot_setup calls apexd to prepare /apex for Pre-reboot Dexopt, but it
# needs to mount a tmpfs on /apex for apexd to work on.
neverallow { domain -apexd -init -otapreopt_chroot } apex_mnt_dir:filesystem { mount unmount };
neverallow { domain -apexd -dexopt_chroot_setup -init -otapreopt_chroot } apex_mnt_dir:dir mounton;
# Allow for use in postinstall
allow apexd otapreopt_chroot:fd use;
@ -212,3 +189,39 @@ set_prop(apexd, apex_ready_prop)
# Allow apexd to write to statsd.
unix_socket_send(apexd, statsdw, statsd)
###
### Neverallow rules
###
neverallow { domain -apexd -init } apex_data_file:dir no_w_dir_perms;
neverallow { domain -apexd -init } apex_metadata_file:dir no_w_dir_perms;
neverallow { domain -apexd -init -kernel } apex_data_file:file no_w_file_perms;
neverallow { domain -apexd -init -kernel } apex_metadata_file:file no_w_file_perms;
neverallow { domain -apexd } apex_mnt_dir:lnk_file no_w_file_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_module_data_file:dir no_w_dir_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_module_data_file:file no_w_file_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_rollback_data_file:dir no_w_dir_perms;
neverallow { domain -apexd -init -vold_prepare_subdirs } apex_rollback_data_file:file no_w_file_perms;
# only apexd can set apexd sysprop
neverallow { domain -apexd -init } apexd_prop:property_service set;
# only apexd can write apex-info-list.xml
neverallow { domain -apexd } apex_info_file:file no_w_file_perms;
# Only apexd and init should be allowed to manage /apex mounts
# A note on otapreopt_chroot. It used to mount APEXes during postainstall stage of A/B OTAs,
# but starting from S it just calls into apexd to prepare /apex for otapreoprt. Once the sepolicies
# around otapreopt_chroot are cleaned up we should be able to remove it from the lists below.
# dexopt_chroot_setup calls apexd to prepare /apex for Pre-reboot Dexopt, but it
# needs to mount a tmpfs on /apex for apexd to work on.
neverallow { domain -apexd -init -otapreopt_chroot } apex_mnt_dir:filesystem { mount unmount };
neverallow { domain -apexd -dexopt_chroot_setup -init -otapreopt_chroot } apex_mnt_dir:dir mounton;
neverallow { domain -init -apexd -system_server -update_engine } apex_service:service_manager find;
neverallow { domain -init -apexd -system_server -servicemanager -update_engine } apexd:binder call;
neverallow { domain userdebug_or_eng(`-crash_dump') } apexd:process ptrace;

View file

@ -84,28 +84,6 @@ allow { appdomain -sdk_sandbox_all } mnt_media_rw_file:dir search;
allow appdomain system_server:udp_socket {
connect getattr read recvfrom sendto write getopt setopt };
neverallow appdomain system_server:udp_socket {
accept append bind create ioctl listen lock name_bind
relabelfrom relabelto setattr shutdown };
# Transition to a non-app domain.
# Exception for the shell and su domains, can transition to runas, etc.
# Exception for crash_dump to allow for app crash reporting.
# Exception for renderscript binaries (/system/bin/bcc, /system/bin/ld.mc)
# to allow renderscript to create privileged executable files.
# Exception for virtualizationmanager to allow running VMs as child processes.
neverallow { appdomain -shell userdebug_or_eng(`-su') }
{ domain -appdomain -crash_dump -rs -virtualizationmanager }:process { transition };
neverallow { appdomain -shell userdebug_or_eng(`-su') }
{ domain -appdomain }:process { dyntransition };
# Don't allow regular apps access to storage configuration properties.
neverallow { appdomain -mediaprovider_app } storage_config_prop:file no_rw_file_perms;
# Don't allow apps reading /system/etc/font_fallback.xml
dontaudit appdomain system_font_fallback_file:file no_rw_file_perms;
neverallow appdomain system_font_fallback_file:file no_rw_file_perms;
# Allow to read sendbug.preferred.domain
get_prop(appdomain, sendbug_config_prop)
@ -134,7 +112,6 @@ allow appdomain apex_art_data_file:file rx_file_perms;
# Allow access to tombstones if an fd to one is given to you.
# An app cannot open the tombstone itself because it lacks `open`.
allow appdomain tombstone_data_file:file { getattr read };
neverallow { appdomain -shell } tombstone_data_file:file ~{ getattr read };
# Execute the shell or other system executables.
allow { appdomain -ephemeral_app -sdk_sandbox_all } shell_exec:file rx_file_perms;
@ -505,6 +482,223 @@ allow appdomain audioserver_tmpfs:file { getattr map read write };
allow appdomain system_server_tmpfs:file { getattr map read write };
allow appdomain zygote_tmpfs:file { map read };
###
### Neverallow rules
###
### These are things that Android apps should NEVER be able to do
###
# Superuser capabilities.
# bluetooth requires net_admin and wake_alarm. network stack app requires net_admin.
neverallow { appdomain -bluetooth -network_stack } self:capability_class_set *;
# Block device access.
neverallow appdomain dev_type:blk_file { read write };
# Note: Try expanding list of app domains in the future.
neverallow { untrusted_app isolated_app shell } graphics_device:chr_file { read write };
neverallow { appdomain -nfc } nfc_device:chr_file
{ read write };
neverallow { appdomain -bluetooth } hci_attach_dev:chr_file
{ read write };
neverallow appdomain tee_device:chr_file { read write };
# Privileged netlink socket interfaces.
neverallow { appdomain -network_stack }
domain:{
netlink_tcpdiag_socket
netlink_nflog_socket
netlink_xfrm_socket
netlink_audit_socket
netlink_dnrt_socket
} *;
# These messages are broadcast messages from the kernel to userspace.
# Do not allow the writing of netlink messages, which has been a source
# of rooting vulns in the past.
neverallow { appdomain -network_stack }
domain:netlink_kobject_uevent_socket { write append };
# Sockets under /dev/socket that are not specifically typed.
neverallow appdomain socket_device:sock_file write;
# Unix domain sockets.
neverallow appdomain adbd_socket:sock_file write;
neverallow { appdomain -radio } rild_socket:sock_file write;
# ptrace access to non-app domains.
neverallow appdomain { domain -appdomain }:process ptrace;
# The Android security model guarantees the confidentiality and integrity
# of application data and execution state. Ptrace bypasses those
# confidentiality guarantees. Disallow ptrace access from system components
# to apps. Crash_dump is excluded, as it needs ptrace access to
# produce stack traces. llkd is excluded, as it needs ptrace access to
# inspect stack traces for live lock conditions.
neverallow {
domain
-appdomain
-crash_dump
userdebug_or_eng(`-llkd')
} appdomain:process ptrace;
# Read or write access to /proc/pid entries for any non-app domain.
# A different form of hidepid=2 like protections
neverallow appdomain { domain -appdomain }:file no_w_file_perms;
neverallow { appdomain -shell } { domain -appdomain }:file no_rw_file_perms;
# signal access to non-app domains.
# sigchld allowed for parent death notification.
# signull allowed for kill(pid, 0) existence test.
# All others prohibited.
# -perfetto is to allow shell (which is an appdomain) to kill perfetto
# (see private/shell.te).
neverallow appdomain { domain -appdomain -perfetto }:process
{ sigkill sigstop signal };
# Write to rootfs.
neverallow appdomain rootfs:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
# Write to /system.
neverallow appdomain system_file_type:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
# Write to entrypoint executables.
neverallow appdomain exec_type:file
{ create write setattr relabelfrom relabelto append unlink link rename };
# Write to system-owned parts of /data.
# This is the default type for anything under /data not otherwise
# specified in file_contexts. Define a different type for portions
# that should be writable by apps.
neverallow appdomain system_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
# Write to various other parts of /data.
neverallow appdomain drm_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow { appdomain -platform_app }
apk_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow { appdomain -platform_app }
apk_private_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow { appdomain -platform_app }
apk_private_tmp_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow { appdomain -shell }
shell_data_file:dir_file_class_set
{ create setattr relabelfrom relabelto append unlink link rename };
neverallow { appdomain -bluetooth }
bluetooth_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow { domain -credstore -init } credstore_data_file:dir_file_class_set *;
neverallow appdomain
keystore_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow appdomain
systemkeys_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow appdomain
wifi_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow appdomain
dhcp_data_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
# access tmp apk files
neverallow { appdomain -platform_app }
apk_tmp_file:dir_file_class_set
{ create write setattr relabelfrom relabelto append unlink link rename };
neverallow { appdomain -untrusted_app_all -platform_app -priv_app -isolated_app_all }
{ apk_tmp_file apk_private_tmp_file }:dir_file_class_set *;
neverallow { untrusted_app_all isolated_app_all } { apk_tmp_file apk_private_tmp_file }:{ devfile_class_set dir fifo_file lnk_file sock_file } *;
neverallow { untrusted_app_all isolated_app_all } { apk_tmp_file apk_private_tmp_file }:file ~{ getattr read };
# Access to factory files.
neverallow appdomain efs_file:dir_file_class_set write;
neverallow { appdomain -shell } efs_file:dir_file_class_set read;
# Write to various pseudo file systems.
neverallow { appdomain -bluetooth -nfc }
sysfs:dir_file_class_set write;
neverallow appdomain
proc:dir_file_class_set write;
# Access to syslog(2) or /proc/kmsg.
neverallow appdomain kernel:system { syslog_read syslog_mod syslog_console };
# SELinux is not an API for apps to use
neverallow { appdomain -shell } *:security { compute_av check_context };
neverallow { appdomain -shell } *:netlink_selinux_socket *;
# Ability to perform any filesystem operation other than statfs(2).
# i.e. no mount(2), unmount(2), etc.
neverallow appdomain fs_type:filesystem ~getattr;
# prevent creation/manipulation of globally readable symlinks
neverallow appdomain {
apk_data_file
cache_file
cache_recovery_file
dev_type
rootfs
system_file
tmpfs
}:lnk_file no_w_file_perms;
# Applications should use the activity model for receiving events
neverallow {
appdomain
-shell # bugreport
} input_device:chr_file ~getattr;
# Do not allow access to Bluetooth-related system properties except for a few allowed domains.
# neverallow rules for access to Bluetooth-related data files are above.
neverallow {
appdomain
-bluetooth
-system_app
} { bluetooth_audio_hal_prop bluetooth_a2dp_offload_prop bluetooth_prop exported_bluetooth_prop }:file create_file_perms;
# allow system_app to access Nfc-related system properties.
set_prop(system_app, nfc_prop)
# allow system_app to access radio_config system properties.
set_prop(system_app, radio_control_prop)
# Apps cannot access proc_uid_time_in_state
neverallow appdomain proc_uid_time_in_state:file *;
# Apps cannot access proc_uid_concurrent_active_time
neverallow appdomain proc_uid_concurrent_active_time:file *;
# Apps cannot access proc_uid_concurrent_policy_time
neverallow appdomain proc_uid_concurrent_policy_time:file *;
# Apps cannot access proc_uid_cpupower
neverallow appdomain proc_uid_cpupower:file *;
# Apps may not read /proc/net/{tcp,tcp6,udp,udp6}. These files leak information across the
# application boundary. VPN apps may use the ConnectivityManager.getConnectionOwnerUid() API to
# perform UID lookups.
neverallow { appdomain -shell } proc_net_tcp_udp:file *;
# Apps cannot access bootstrap files. The bootstrap files are only for
# extremely early processes (like init, etc.) which are started before
# the runtime APEX is activated and Bionic libs are provided from there.
# If app process accesses (or even load/execute) the bootstrap files,
# it might cause problems such as ODR violation, etc.
neverallow appdomain system_bootstrap_lib_file:file
{ open read write append execute execute_no_trans map };
neverallow appdomain system_bootstrap_lib_file:dir
{ open read getattr search };
# Sensitive app domains are not allowed to execute from /data
# to prevent persistence attacks and ensure all code is executed
# from read-only locations.
@ -559,3 +753,27 @@ neverallow {
-untrusted_app_30
-untrusted_app_32
} apk_data_file:file { watch watch_reads };
neverallow appdomain system_server:udp_socket {
accept append bind create ioctl listen lock name_bind
relabelfrom relabelto setattr shutdown };
# Transition to a non-app domain.
# Exception for the shell and su domains, can transition to runas, etc.
# Exception for crash_dump to allow for app crash reporting.
# Exception for renderscript binaries (/system/bin/bcc, /system/bin/ld.mc)
# to allow renderscript to create privileged executable files.
# Exception for virtualizationmanager to allow running VMs as child processes.
neverallow { appdomain -shell userdebug_or_eng(`-su') }
{ domain -appdomain -crash_dump -rs -virtualizationmanager }:process { transition };
neverallow { appdomain -shell userdebug_or_eng(`-su') }
{ domain -appdomain }:process { dyntransition };
# Don't allow regular apps access to storage configuration properties.
neverallow { appdomain -mediaprovider_app } storage_config_prop:file no_rw_file_perms;
# Don't allow apps reading /system/etc/font_fallback.xml
dontaudit appdomain system_font_fallback_file:file no_rw_file_perms;
neverallow appdomain system_font_fallback_file:file no_rw_file_perms;
neverallow { appdomain -shell } tombstone_data_file:file ~{ getattr read };

View file

@ -8,4 +8,28 @@ with_asan(`
# We need to signal a reboot when done.
set_prop(asan_extract, powerctl_prop)
# Allow asan_extract to execute itself using #!/system/bin/sh
allow asan_extract shell_exec:file rx_file_perms;
# We execute log, rm, gzip and tar.
allow asan_extract toolbox_exec:file rx_file_perms;
allow asan_extract system_file:file execute_no_trans;
# asan_extract deletes old /data/lib.
allow asan_extract system_file:dir { open read remove_name rmdir write };
allow asan_extract system_file:file unlink;
# asan_extract untars ASAN libraries into /data.
allow asan_extract system_data_file:dir create_dir_perms ;
allow asan_extract system_data_file:{ file lnk_file } create_file_perms ;
# Relabel the libraries with restorecon.
allow asan_extract file_contexts_file:file r_file_perms;
allow asan_extract system_data_file:{ dir file } relabelfrom;
allow asan_extract system_file:dir { relabelto setattr };
allow asan_extract system_file:file relabelto;
# Restorecon will actually already try to run with sanitized libraries (libpackagelistparser).
allow asan_extract system_data_file:file execute;
')

View file

@ -1,8 +1,7 @@
# audioserver - audio services daemon
type audioserver_exec, exec_type, file_type, system_file_type;
typeattribute audioserver coredomain;
type audioserver_exec, exec_type, file_type, system_file_type;
init_daemon_domain(audioserver)
tmpfs_domain(audioserver)
@ -79,6 +78,20 @@ userdebug_or_eng(`
# Allow write access to log tag property
set_prop(audioserver, log_tag_prop);
# Allow audioserver to signal audio HAL processes and dump their stacks.
allow audioserver hal_audio_server:process signal;
# Allow audioserver to access sensorservice.
allow audioserver sensorservice_service:service_manager find;
allow audioserver system_server:unix_stream_socket { read write };
# Allow using wake locks
wakelock_use(audioserver)
# Allow reading audio config props, e.g. af.fast_track_multiplier
get_prop(audioserver, audio_config_prop)
get_prop(audioserver, system_audio_config_prop)
###
### neverallow rules
###
@ -99,10 +112,3 @@ neverallow audioserver { file_type fs_type }:file execute_no_trans;
# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html
neverallow audioserver domain:{ udp_socket rawip_socket } *;
neverallow audioserver { domain userdebug_or_eng(`-su') }:tcp_socket *;
# Allow using wake locks
wakelock_use(audioserver)
# Allow reading audio config props, e.g. af.fast_track_multiplier
get_prop(audioserver, audio_config_prop)
get_prop(audioserver, system_audio_config_prop)

View file

@ -21,3 +21,46 @@ r_dir_file(bootanim, bootanim_data_file)
# Allow accessing vendor apex for EGL/GLES
allow bootanim vendor_apex_metadata_file:dir r_dir_perms;
hal_client_domain(bootanim, hal_configstore)
hal_client_domain(bootanim, hal_graphics_allocator)
hal_client_domain(bootanim, hal_graphics_composer)
binder_use(bootanim)
binder_call(bootanim, surfaceflinger)
binder_call(bootanim, audioserver)
hwbinder_use(bootanim)
allow bootanim gpu_device:chr_file rw_file_perms;
allow bootanim gpu_device:dir r_dir_perms;
allow bootanim sysfs_gpu:file r_file_perms;
# /oem access
allow bootanim oemfs:dir r_dir_perms;
# boot animations on oem are stored with specific label
allow bootanim bootanim_oem_file:file r_file_perms;
allow bootanim audio_device:dir r_dir_perms;
allow bootanim audio_device:chr_file rw_file_perms;
allow bootanim audioserver_service:service_manager find;
allow bootanim surfaceflinger_service:service_manager find;
allow bootanim surfaceflinger:unix_stream_socket { read write };
# Allow access to ion memory allocation device
allow bootanim ion_device:chr_file rw_file_perms;
# Allow access to DMA-BUF system heap
allow bootanim dmabuf_system_heap_device:chr_file r_file_perms;
allow bootanim hal_graphics_allocator:fd use;
# Fences
allow bootanim hal_graphics_composer:fd use;
# Read access to pseudo filesystems.
allow bootanim proc_meminfo:file r_file_perms;
# System file accesses.
allow bootanim system_file:dir r_dir_perms;

View file

@ -10,6 +10,39 @@ set_prop(bootstat, bootloader_boot_reason_prop)
set_prop(bootstat, system_boot_reason_prop)
set_prop(bootstat, last_boot_reason_prop)
read_runtime_log_tags(bootstat)
# Allow persistent storage in /data/misc/bootstat.
allow bootstat bootstat_data_file:dir rw_dir_perms;
allow bootstat bootstat_data_file:file create_file_perms;
allow bootstat metadata_file:dir search;
allow bootstat metadata_bootstat_file:dir rw_dir_perms;
allow bootstat metadata_bootstat_file:file create_file_perms;
# ToDo: TBI move access for the following to a system health HAL
# Allow access to /sys/fs/pstore/ and syslog
allow bootstat pstorefs:dir search;
allow bootstat pstorefs:file r_file_perms;
allow bootstat kernel:system syslog_read;
# Allow access to reading the logs to read aspects of system health
read_logd(bootstat)
# Allow bootstat write to statsd.
unix_socket_send(bootstat, statsdw, statsd)
###
### Neverallow rules
###
neverallow {
domain
-bootstat
-init
} system_boot_reason_prop:property_service set;
neverallow {
domain
-bootanim

View file

@ -1,3 +1,24 @@
typeattribute bufferhubd coredomain;
init_daemon_domain(bufferhubd)
hal_client_domain(bufferhubd, hal_graphics_allocator)
# TODO(b/112338294): remove these after migrate to Binder
pdx_server(bufferhubd, bufferhub_client)
pdx_client(bufferhubd, performance_client)
# Access the GPU.
allow bufferhubd gpu_device:chr_file rw_file_perms;
# Access /dev/ion
allow bufferhubd ion_device:chr_file r_file_perms;
# Receive sync fence FDs from hal_omx_server. Note that hal_omx_server never directly
# connects to bufferhubd via PDX. Instead, a VR app acts as a bridge between
# those two: it talks to hal_omx_server via Binder and talks to bufferhubd via PDX.
# Thus, there is no need to use pdx_client macro.
allow bufferhubd hal_omx_server:fd use;
# Codec2 is similar to OMX
allow bufferhubd hal_codec2_server:fd use;

View file

@ -1,6 +1,5 @@
typeattribute cameraserver coredomain;
typeattribute cameraserver camera_service_server;
typeattribute cameraserver coredomain;
init_daemon_domain(cameraserver)
tmpfs_domain(cameraserver)
@ -8,3 +7,86 @@ tmpfs_domain(cameraserver)
allow cameraserver gpu_device:chr_file rw_file_perms;
allow cameraserver gpu_device:dir r_dir_perms;
allow cameraserver virtual_camera:binder call;
binder_use(cameraserver)
binder_call(cameraserver, binderservicedomain)
binder_call(cameraserver, appdomain)
binder_service(cameraserver)
hal_client_domain(cameraserver, hal_camera)
hal_client_domain(cameraserver, hal_graphics_allocator)
allow cameraserver ion_device:chr_file rw_file_perms;
allow cameraserver dmabuf_system_heap_device:chr_file r_file_perms;
# Talk with graphics composer fences
allow cameraserver hal_graphics_composer:fd use;
add_service(cameraserver, cameraserver_service)
add_service(cameraserver, fwk_camera_service)
add_hwservice(cameraserver, fwk_camera_hwservice)
allow cameraserver activity_service:service_manager find;
allow cameraserver appops_service:service_manager find;
allow cameraserver audioserver_service:service_manager find;
allow cameraserver batterystats_service:service_manager find;
allow cameraserver cameraproxy_service:service_manager find;
allow cameraserver mediaserver_service:service_manager find;
allow cameraserver package_native_service:service_manager find;
allow cameraserver permission_checker_service:service_manager find;
allow cameraserver processinfo_service:service_manager find;
allow cameraserver scheduling_policy_service:service_manager find;
allow cameraserver sensor_privacy_service:service_manager find;
allow cameraserver surfaceflinger_service:service_manager find;
allow cameraserver hidl_token_hwservice:hwservice_manager find;
allow cameraserver hal_camera_service:service_manager find;
allow cameraserver virtual_camera_service:service_manager find;
# Allow to talk with surfaceflinger through unix stream socket
allow cameraserver surfaceflinger:unix_stream_socket { read write };
# Allow shell commands from ADB for CTS testing/dumping
allow cameraserver adbd:fd use;
allow cameraserver adbd:unix_stream_socket { read write };
allow cameraserver shell:fd use;
allow cameraserver shell:unix_stream_socket { read write };
allow cameraserver shell:fifo_file { read write };
# allow self to set SCHED_FIFO
allow cameraserver self:global_capability_class_set sys_nice;
# Allow to talk with media codec
allow cameraserver mediametrics_service:service_manager find;
hal_client_domain(cameraserver, hal_codec2)
hal_client_domain(cameraserver, hal_omx)
hal_client_domain(cameraserver, hal_allocator)
# Allow shell commands from ADB for CTS testing/dumping
userdebug_or_eng(`
allow cameraserver su:fd use;
allow cameraserver su:fifo_file { read write };
allow cameraserver su:unix_stream_socket { read write };
')
###
### neverallow rules
###
# cameraserver should never execute any executable without a
# domain transition
neverallow cameraserver { file_type fs_type }:file execute_no_trans;
# The goal of the mediaserver split is to place media processing code into
# restrictive sandboxes with limited responsibilities and thus limited
# permissions. Example: Audioserver is only responsible for controlling audio
# hardware and processing audio content. Cameraserver does the same for camera
# hardware/content. Etc.
#
# Media processing code is inherently risky and thus should have limited
# permissions and be isolated from the rest of the system and network.
# Lengthier explanation here:
# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html
neverallow cameraserver domain:{ udp_socket rawip_socket } *;
neverallow cameraserver { domain userdebug_or_eng(`-su') }:tcp_socket *;

View file

@ -1,5 +1,8 @@
typeattribute charger coredomain;
# The system charger is a client of HIDL health HAL.
hal_client_domain(charger, hal_health)
# charger needs to tell init to continue the boot
# process when running in charger mode.
# The system charger needs to be allowed to set these properties on legacy devices.

View file

@ -6,6 +6,44 @@ get_prop(charger_type, charger_config_prop)
# get minui properties
get_prop(charger_type, recovery_config_prop)
# Write to /dev/kmsg
allow charger_type kmsg_device:chr_file rw_file_perms;
# Read access to pseudo filesystems.
r_dir_file(charger_type, rootfs)
r_dir_file(charger_type, cgroup)
r_dir_file(charger_type, cgroup_v2)
# Allow to read /sys/class/power_supply directory
allow charger_type sysfs_type:dir r_dir_perms;
allow charger_type self:global_capability_class_set {
sys_boot
sys_tty_config
};
wakelock_use(charger_type)
allow charger_type self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl;
# Read/write to /sys/power/state
allow charger_type sysfs_power:file rw_file_perms;
r_dir_file(charger_type, sysfs_batteryinfo)
# Read /sys/fs/pstore/console-ramoops
# Don't worry about overly broad permissions for now, as there's
# only one file in /sys/fs/pstore
allow charger_type pstorefs:dir r_dir_perms;
allow charger_type pstorefs:file r_file_perms;
allow charger_type graphics_device:dir r_dir_perms;
allow charger_type graphics_device:chr_file rw_file_perms;
allow charger_type input_device:dir r_dir_perms;
allow charger_type input_device:chr_file r_file_perms;
allow charger_type tty_device:chr_file rw_file_perms;
allow charger_type proc_sysrq:file rw_file_perms;
### Neverallow rules for charger properties
# charger_config_prop: Only init and vendor_init is allowed to set it

View file

@ -0,0 +1,3 @@
hal_server_domain(charger_vendor, hal_health)
typeattribute charger_vendor bpfdomain;

View file

@ -39,10 +39,84 @@ allow crash_dump system_bootstrap_lib_file:file r_file_perms;
# Read Vendor APEX directories
allow crash_dump vendor_apex_metadata_file:dir { getattr search };
# crash_dump might inherit CAP_SYS_PTRACE from a privileged process,
# which will result in an audit log even when it's allowed to trace.
dontaudit crash_dump self:global_capability_class_set { sys_ptrace };
userdebug_or_eng(`
allow crash_dump logd:process { ptrace signal sigchld sigstop sigkill };
# Let crash_dump write to /dev/kmsg_debug crashes that happen before logd comes up.
allow crash_dump kmsg_debug_device:chr_file { open append };
')
# Use inherited file descriptors
allow crash_dump domain:fd use;
# Read/write IPC pipes inherited from crashing processes.
allow crash_dump domain:fifo_file { read write };
# Append to pipes given to us by processes requesting dumps (e.g. dumpstate)
allow crash_dump domain:fifo_file { append };
# Read information from /proc/$PID.
allow crash_dump domain:process getattr;
r_dir_file(crash_dump, domain)
allow crash_dump exec_type:file r_file_perms;
# Read /data/dalvik-cache.
allow crash_dump dalvikcache_data_file:dir { search getattr };
allow crash_dump dalvikcache_data_file:file r_file_perms;
# Read APEX data directories.
allow crash_dump apex_module_data_file:dir { getattr search };
# Read uptime
allow crash_dump proc_uptime:file r_file_perms;
# Read APK files.
r_dir_file(crash_dump, apk_data_file);
# Read all /vendor
r_dir_file(crash_dump, { vendor_file same_process_hal_file })
# Read all /data/local/tests
r_dir_file(crash_dump, shell_test_data_file)
# Talk to tombstoned
unix_socket_connect(crash_dump, tombstoned_crash, tombstoned)
# Talk to ActivityManager.
unix_socket_connect(crash_dump, system_ndebug, system_server)
# Append to ANR files.
allow crash_dump anr_data_file:file { append getattr };
# Append to tombstone files.
allow crash_dump tombstone_data_file:file { append getattr };
# crash_dump writes out logcat logs at the bottom of tombstones,
# which is super useful in some cases.
unix_socket_connect(crash_dump, logdr, logd)
# Crash dump is not intended to access the following files. Since these
# are WAI, suppress the denials to clean up the logs.
dontaudit crash_dump {
core_data_file_type
vendor_file_type
}:dir search;
dontaudit crash_dump system_data_file:{ lnk_file file } read;
dontaudit crash_dump property_type:file read;
###
### neverallow assertions
###
# A domain transition must occur for crash_dump to get the privileges needed to trace the process.
# Do not allow the execution of crash_dump without a domain transition.
neverallow domain crash_dump_exec:file execute_no_trans;
# sigchld not explicitly forbidden since it's part of the
# domain-transition-on-exec macros, and is by itself not sensitive
neverallow crash_dump {

View file

@ -11,3 +11,19 @@ hal_client_domain(credstore, hal_keymint)
# credstore needs to get keys from the RKPD
get_prop(credstore, remote_prov_prop)
allow credstore remote_provisioning_service:service_manager find;
binder_use(credstore)
binder_service(credstore)
binder_call(credstore, system_server)
allow credstore credstore_data_file:dir create_dir_perms;
allow credstore credstore_data_file:file create_file_perms;
add_service(credstore, credstore_service)
allow credstore sec_key_att_app_id_provider_service:service_manager find;
allow credstore dropbox_service:service_manager find;
allow credstore authorization_service:service_manager find;
allow credstore keystore:keystore2 get_auth_token;
r_dir_file(credstore, cgroup)
r_dir_file(credstore, cgroup_v2)

View file

@ -5,3 +5,29 @@ type_transition dhcp system_data_file:{ dir file } dhcp_data_file;
set_prop(dhcp, dhcp_prop)
set_prop(dhcp, pan_result_prop)
net_domain(dhcp)
allow dhcp cgroup:dir { create write add_name };
allow dhcp cgroup_v2:dir { create write add_name };
allow dhcp self:global_capability_class_set { setgid setuid net_admin net_raw net_bind_service };
allow dhcp self:packet_socket create_socket_perms_no_ioctl;
allow dhcp self:netlink_route_socket nlmsg_write;
allow dhcp shell_exec:file rx_file_perms;
allow dhcp system_file:file rx_file_perms;
not_full_treble(`allow dhcp vendor_file:file rx_file_perms;')
# dhcpcd runs dhcpcd-hooks/*, which runs getprop / setprop (toolbox_exec)
allow dhcp toolbox_exec:file rx_file_perms;
# For /proc/sys/net/ipv4/conf/*/promote_secondaries
allow dhcp proc_net_type:file write;
allow dhcp dhcp_data_file:dir create_dir_perms;
allow dhcp dhcp_data_file:file create_file_perms;
# PAN connections
allow dhcp netd:fd use;
allow dhcp netd:fifo_file rw_file_perms;
allow dhcp netd:{ dgram_socket_class_set unix_stream_socket } { read write };
allow dhcp netd:{ netlink_kobject_uevent_socket netlink_route_socket netlink_nflog_socket } { read write };

View file

@ -1 +1,23 @@
typeattribute dnsmasq coredomain;
net_domain(dnsmasq)
allowxperm dnsmasq self:udp_socket ioctl priv_sock_ioctls;
# TODO: Run with dhcp group to avoid need for dac_override.
allow dnsmasq self:global_capability_class_set { dac_override dac_read_search };
allow dnsmasq self:global_capability_class_set { net_admin net_raw net_bind_service setgid setuid };
allow dnsmasq dhcp_data_file:dir w_dir_perms;
allow dnsmasq dhcp_data_file:file create_file_perms;
# Inherit and use open files from netd.
allow dnsmasq netd:fd use;
allow dnsmasq netd:fifo_file { getattr read write };
# TODO: Investigate whether these inherited sockets should be closed on exec.
allow dnsmasq netd:netlink_kobject_uevent_socket { read write };
allow dnsmasq netd:netlink_nflog_socket { read write };
allow dnsmasq netd:netlink_route_socket { read write };
allow dnsmasq netd:unix_stream_socket { getattr read write };
allow dnsmasq netd:unix_dgram_socket { read write };
allow dnsmasq netd:udp_socket { read write };

File diff suppressed because it is too large Load diff

View file

@ -7,3 +7,63 @@ type_transition drmserver apk_data_file:sock_file drmserver_socket;
typeattribute drmserver_socket coredomain_socket;
get_prop(drmserver, drm_service_config_prop)
typeattribute drmserver mlstrustedsubject;
net_domain(drmserver)
# Perform Binder IPC to system server.
binder_use(drmserver)
binder_call(drmserver, system_server)
binder_call(drmserver, appdomain)
binder_call(drmserver, mediametrics)
binder_service(drmserver)
# Inherit or receive open files from system_server.
allow drmserver system_server:fd use;
# Perform Binder IPC to mediaserver
binder_call(drmserver, mediaserver)
allow drmserver { sdcard_type fuse }:dir search;
allow drmserver drm_data_file:dir create_dir_perms;
allow drmserver drm_data_file:file create_file_perms;
allow drmserver { app_data_file privapp_data_file }:file { read write getattr map };
allow drmserver { sdcard_type fuse }:file { read write getattr map };
r_dir_file(drmserver, efs_file)
# /data/app/tlcd_sock socket file.
# Clearly, /data/app is the most logical place to create a socket. Not.
allow drmserver apk_data_file:dir rw_dir_perms;
auditallow drmserver apk_data_file:dir { add_name write };
allow drmserver drmserver_socket:sock_file create_file_perms;
auditallow drmserver drmserver_socket:sock_file create;
# Delete old socket file if present.
allow drmserver apk_data_file:sock_file unlink;
# After taking a video, drmserver looks at the video file.
r_dir_file(drmserver, media_rw_data_file)
# Read resources from open apk files passed over Binder.
allow drmserver apk_data_file:file { read getattr map };
allow drmserver asec_apk_file:file { read getattr map };
allow drmserver ringtone_file:file { read getattr map };
# Read /data/data/com.android.providers.telephony files passed over Binder.
allow drmserver radio_data_file:file { read getattr map };
# /oem access
allow drmserver oemfs:dir search;
allow drmserver oemfs:file r_file_perms;
# overlay package access
allow drmserver vendor_overlay_file:file { read map };
add_service(drmserver, drmserver_service)
allow drmserver permission_service:service_manager find;
allow drmserver mediametrics_service:service_manager find;
selinux_check_access(drmserver)
r_dir_file(drmserver, cgroup)
r_dir_file(drmserver, cgroup_v2)
r_dir_file(drmserver, system_file)

View file

@ -151,3 +151,407 @@ allow dumpstate system_dlkm_file:dir getattr;
# Allow dumpstate to execute derive_sdk in its own domain
domain_auto_trans(dumpstate, derive_sdk_exec, derive_sdk)
net_domain(dumpstate)
binder_use(dumpstate)
wakelock_use(dumpstate)
# Allow setting process priority, protect from OOM killer, and dropping
# privileges by switching UID / GID
allow dumpstate self:global_capability_class_set { setuid setgid sys_resource };
# Allow dumpstate to scan through /proc/pid for all processes
r_dir_file(dumpstate, domain)
allow dumpstate self:global_capability_class_set {
# Send signals to processes
kill
# Run iptables
net_raw
net_admin
};
# Allow executing files on system, such as:
# /system/bin/toolbox
# /system/bin/logcat
# /system/bin/dumpsys
allow dumpstate system_file:file execute_no_trans;
not_full_treble(`allow dumpstate vendor_file:file execute_no_trans;')
allow dumpstate toolbox_exec:file rx_file_perms;
# hidl searches for files in /system/lib(64)/hw/
allow dumpstate system_file:dir r_dir_perms;
# Create and write into /data/anr/
allow dumpstate self:global_capability_class_set { dac_override dac_read_search chown fowner fsetid };
allow dumpstate anr_data_file:dir rw_dir_perms;
allow dumpstate anr_data_file:file create_file_perms;
# Allow reading /data/system/uiderrors.txt
# TODO: scope this down.
allow dumpstate system_data_file:file r_file_perms;
# Allow dumpstate to append into apps' private files.
allow dumpstate { privapp_data_file app_data_file }:file append;
# Read dmesg
allow dumpstate self:global_capability2_class_set syslog;
allow dumpstate kernel:system syslog_read;
# Read /sys/fs/pstore/console-ramoops
allow dumpstate pstorefs:dir r_dir_perms;
allow dumpstate pstorefs:file r_file_perms;
# Get process attributes
allow dumpstate domain:process getattr;
# Signal java processes to dump their stack
allow dumpstate { appdomain system_server zygote app_zygote }:process signal;
# Signal native processes to dump their stack.
allow dumpstate {
# This list comes from native_processes_to_dump in dumputils/dump_utils.c
audioserver
cameraserver
drmserver
inputflinger
mediadrmserver
mediaextractor
mediametrics
mediaserver
mediaswcodec
sdcardd
surfaceflinger
vold
# This list comes from hal_interfaces_to_dump in dumputils/dump_utils.c
evsmanagerd
hal_audio_server
hal_audiocontrol_server
hal_bluetooth_server
hal_broadcastradio_server
hal_camera_server
hal_codec2_server
hal_drm_server
hal_evs_server
hal_face_server
hal_fingerprint_server
hal_graphics_allocator_server
hal_graphics_composer_server
hal_health_server
hal_input_processor_server
hal_neuralnetworks_server
hal_omx_server
hal_power_server
hal_power_stats_server
hal_sensors_server
hal_thermal_server
hal_vehicle_server
hal_vr_server
system_suspend_server
}:process signal;
# Connect to tombstoned to intercept dumps.
unix_socket_connect(dumpstate, tombstoned_intercept, tombstoned)
# Access to /sys
allow dumpstate sysfs_type:dir r_dir_perms;
allow dumpstate {
sysfs_devices_block
sysfs_dm
sysfs_loop
sysfs_usb
sysfs_zram
}:file r_file_perms;
# Ignore other file access under /sys.
dontaudit dumpstate sysfs:file r_file_perms;
# Other random bits of data we want to collect
no_debugfs_restriction(`
allow dumpstate debugfs:file r_file_perms;
auditallow dumpstate debugfs:file r_file_perms;
allow dumpstate debugfs_mmc:file r_file_perms;
')
# df for
allow dumpstate {
block_device
cache_file
metadata_file
rootfs
selinuxfs
storage_file
tmpfs
}:dir { search getattr };
allow dumpstate fuse_device:chr_file getattr;
allow dumpstate { dm_device cache_block_device }:blk_file getattr;
allow dumpstate { cache_file rootfs }:lnk_file { getattr read };
# Read /dev/cpuctl and /dev/cpuset
r_dir_file(dumpstate, cgroup)
r_dir_file(dumpstate, cgroup_v2)
# Allow dumpstate to make binder calls to any binder service
binder_call(dumpstate, binderservicedomain)
binder_call(dumpstate, { appdomain artd netd wificond })
# Allow dumpstate to call dump() on specific hals.
dump_hal(hal_audio)
dump_hal(hal_audiocontrol)
dump_hal(hal_authgraph)
dump_hal(hal_authsecret)
dump_hal(hal_bluetooth)
dump_hal(hal_broadcastradio)
dump_hal(hal_camera)
dump_hal(hal_codec2)
dump_hal(hal_contexthub)
dump_hal(hal_drm)
dump_hal(hal_dumpstate)
dump_hal(hal_evs)
dump_hal(hal_face)
dump_hal(hal_fingerprint)
dump_hal(hal_gnss)
dump_hal(hal_graphics_allocator)
dump_hal(hal_graphics_composer)
dump_hal(hal_health)
dump_hal(hal_identity)
dump_hal(hal_input_processor)
dump_hal(hal_keymint)
dump_hal(hal_light)
dump_hal(hal_memtrack)
dump_hal(hal_neuralnetworks)
dump_hal(hal_nfc)
dump_hal(hal_oemlock)
dump_hal(hal_power)
dump_hal(hal_power_stats)
dump_hal(hal_rebootescrow)
dump_hal(hal_secretkeeper)
dump_hal(hal_sensors)
dump_hal(hal_thermal)
dump_hal(hal_vehicle)
dump_hal(hal_weaver)
dump_hal(hal_wifi)
# Vibrate the device after we are done collecting the bugreport
hal_client_domain(dumpstate, hal_vibrator)
# Reading /proc/PID/maps of other processes
allow dumpstate self:global_capability_class_set sys_ptrace;
# Allow the bugreport service to create a file in
# /data/data/com.android.shell/files/bugreports/bugreport
allow dumpstate shell_data_file:dir create_dir_perms;
allow dumpstate shell_data_file:file create_file_perms;
# Run a shell.
allow dumpstate shell_exec:file rx_file_perms;
# For running am and similar framework commands.
# Run /system/bin/app_process.
allow dumpstate zygote_exec:file rx_file_perms;
# For Bluetooth
allow dumpstate bluetooth_data_file:dir search;
allow dumpstate bluetooth_logs_data_file:dir r_dir_perms;
allow dumpstate bluetooth_logs_data_file:file r_file_perms;
# For Nfc
allow dumpstate nfc_logs_data_file:dir r_dir_perms;
allow dumpstate nfc_logs_data_file:file r_file_perms;
# Dumpstate calls screencap, which grabs a screenshot. Needs gpu access
allow dumpstate gpu_device:chr_file rw_file_perms;
allow dumpstate gpu_device:dir r_dir_perms;
# logd access
read_logd(dumpstate)
control_logd(dumpstate)
read_runtime_log_tags(dumpstate)
# Read files in /proc
allow dumpstate {
proc_bootconfig
proc_buddyinfo
proc_cmdline
proc_meminfo
proc_modules
proc_net_type
proc_pipe_conf
proc_pagetypeinfo
proc_qtaguid_ctrl
proc_qtaguid_stat
proc_slabinfo
proc_version
proc_vmallocinfo
proc_vmstat
}:file r_file_perms;
# Read network state info files.
allow dumpstate net_data_file:dir search;
allow dumpstate net_data_file:file r_file_perms;
# List sockets via ss.
allow dumpstate self:netlink_tcpdiag_socket { create_socket_perms_no_ioctl nlmsg_read };
# Access /data/tombstones.
allow dumpstate tombstone_data_file:dir r_dir_perms;
allow dumpstate tombstone_data_file:file r_file_perms;
# Access /cache/recovery
allow dumpstate cache_recovery_file:dir r_dir_perms;
allow dumpstate cache_recovery_file:file r_file_perms;
# Access /data/misc/recovery
allow dumpstate recovery_data_file:dir r_dir_perms;
allow dumpstate recovery_data_file:file r_file_perms;
# Access /data/misc/update_engine & /data/misc/update_engine_log
allow dumpstate { update_engine_data_file update_engine_log_data_file }:dir r_dir_perms;
allow dumpstate { update_engine_data_file update_engine_log_data_file }:file r_file_perms;
# Access /data/misc/snapuserd_log
allow dumpstate snapuserd_log_data_file:dir r_dir_perms;
allow dumpstate snapuserd_log_data_file:file r_file_perms;
# Access /data/misc/profiles/{cur,ref}/
userdebug_or_eng(`
allow dumpstate { user_profile_root_file user_profile_data_file}:dir r_dir_perms;
allow dumpstate user_profile_data_file:file r_file_perms;
')
# Access /data/misc/logd
allow dumpstate misc_logd_file:dir r_dir_perms;
allow dumpstate misc_logd_file:file r_file_perms;
# Access /data/misc/prereboot
allow dumpstate prereboot_data_file:dir r_dir_perms;
allow dumpstate prereboot_data_file:file r_file_perms;
allow dumpstate app_fuse_file:dir r_dir_perms;
allow dumpstate overlayfs_file:dir r_dir_perms;
allow dumpstate {
service_manager_type
-apex_service
-dumpstate_service
-gatekeeper_service
-hal_service_type
-virtual_touchpad_service
-vold_service
-default_android_service
}:service_manager find;
# suppress denials for services dumpstate should not be accessing.
dontaudit dumpstate {
apex_service
dumpstate_service
gatekeeper_service
hal_service_type
virtual_touchpad_service
vold_service
}:service_manager find;
# Most of these are neverallowed.
dontaudit dumpstate hwservice_manager_type:hwservice_manager find;
allow dumpstate servicemanager:service_manager list;
allow dumpstate hwservicemanager:hwservice_manager list;
allow dumpstate devpts:chr_file rw_file_perms;
# Read any system properties
get_prop(dumpstate, property_type)
# Access to /data/media.
# This should be removed if sdcardfs is modified to alter the secontext for its
# accesses to the underlying FS.
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
add_service(dumpstate, dumpstate_service)
# use /dev/ion for screen capture
allow dumpstate ion_device:chr_file r_file_perms;
# Allow dumpstate to run top
allow dumpstate proc_stat:file r_file_perms;
allow dumpstate proc_pressure_cpu:file r_file_perms;
allow dumpstate proc_pressure_mem:file r_file_perms;
allow dumpstate proc_pressure_io:file r_file_perms;
# Allow dumpstate to run ps
allow dumpstate proc_pid_max:file r_file_perms;
# Allow dumpstate to talk to installd over binder
binder_call(dumpstate, installd);
# Allow dumpstate to run ip xfrm policy
allow dumpstate self:netlink_xfrm_socket { create_socket_perms_no_ioctl nlmsg_read };
# Allow dumpstate to run iotop
allow dumpstate self:netlink_socket create_socket_perms_no_ioctl;
# newer kernels (e.g. 4.4) have a new class for sockets
allow dumpstate self:netlink_generic_socket create_socket_perms_no_ioctl;
# Allow dumpstate to run ss
allow dumpstate { domain pdx_channel_socket_type pdx_endpoint_socket_type }:socket_class_set getattr;
# Allow dumpstate to read linkerconfig directory
allow dumpstate linkerconfig_file:dir { read open };
# For when dumpstate runs df
dontaudit dumpstate {
mnt_vendor_file
mirror_data_file
mnt_user_file
mnt_product_file
}:dir search;
dontaudit dumpstate {
apex_mnt_dir
linkerconfig_file
mirror_data_file
mnt_user_file
}:dir getattr;
# Allow dumpstate to talk to bufferhubd over binder
binder_call(dumpstate, bufferhubd);
# Allow dumpstate to talk to mediaswcodec over binder
binder_call(dumpstate, mediaswcodec);
#Access /data/misc/snapshotctl_log
allow dumpstate snapshotctl_log_data_file:dir r_dir_perms;
allow dumpstate snapshotctl_log_data_file:file r_file_perms;
#Allow access to /dev/binderfs/binder_logs
allow dumpstate binderfs_logs:dir r_dir_perms;
allow dumpstate binderfs_logs:file r_file_perms;
allow dumpstate binderfs_logs_proc:file r_file_perms;
allow dumpstate binderfs_logs_stats:file r_file_perms;
use_apex_info(dumpstate)
# Allow reading files under /data/system/shutdown-checkpoints/
allow dumpstate shutdown_checkpoints_system_data_file:dir r_dir_perms;
allow dumpstate shutdown_checkpoints_system_data_file:file r_file_perms;
###
### neverallow rules
###
# dumpstate has capability sys_ptrace, but should only use that capability for
# accessing sensitive /proc/PID files, never for using ptrace attach.
neverallow dumpstate *:process ptrace;
# only system_server, dumpstate, traceur_app and shell can find the dumpstate service
neverallow {
domain
-system_server
-shell
-traceur_app
-dumpstate
} dumpstate_service:service_manager find;

30
private/e2fs.te Normal file
View file

@ -0,0 +1,30 @@
allow e2fs devpts:chr_file { read write getattr ioctl };
allow e2fs dev_type:blk_file getattr;
allow e2fs block_device:dir search;
allow e2fs userdata_block_device:blk_file rw_file_perms;
allow e2fs metadata_block_device:blk_file rw_file_perms;
allow e2fs dm_device:blk_file rw_file_perms;
allow e2fs zoned_block_device:blk_file rw_file_perms;
# Vold needs to capture mkfs.ext4's output
allow e2fs vold:fd use;
# Need to be able to format a partition
allow e2fs sysfs_dm:dir r_dir_perms;
allow e2fs sysfs_dm:file r_file_perms;
allowxperm e2fs { userdata_block_device metadata_block_device dm_device zoned_block_device }:blk_file ioctl {
BLKSECDISCARD BLKDISCARD BLKPBSZGET BLKDISCARDZEROES BLKROGET BLKREPORTZONE BLKRESETZONE
};
allow e2fs {
proc_filesystems
proc_mounts
proc_swaps
}:file r_file_perms;
# access /sys/fs/ext4/features
allow e2fs sysfs_fs_ext4_features:dir search;
allow e2fs sysfs_fs_ext4_features:file r_file_perms;
# access SELinux context files
allow e2fs file_contexts_file:file r_file_perms;

View file

@ -4,3 +4,13 @@ init_daemon_domain(extra_free_kbytes)
# Only extra_free_kbytes script is allowed to store these properties
set_prop(extra_free_kbytes, init_storage_prop)
# required permissions to run the script from init
allow extra_free_kbytes shell_exec:file rx_file_perms;
allow extra_free_kbytes system_file:file x_file_perms;
allow extra_free_kbytes toolbox_exec:file rx_file_perms;
# files used by the script
allow extra_free_kbytes proc_extra_free_kbytes:file rw_file_perms;
allow extra_free_kbytes proc_watermark_scale_factor:file rw_file_perms;
allow extra_free_kbytes proc_zoneinfo:file r_file_perms;

View file

@ -49,9 +49,129 @@ recovery_only(`
# Let this domain use the hal fastboot service
binder_use(fastbootd)
hal_client_domain(fastbootd, hal_fastboot)
# fastbootd can only use HALs in passthrough mode
passthrough_hal_client_domain(fastbootd, hal_bootctl)
# fastbootd can use AIDL HALs in binder mode
binder_use(fastbootd)
hal_client_domain(fastbootd, hal_health)
hal_client_domain(fastbootd, hal_fastboot)
# Access /dev/usb-ffs/fastbootd/ep0
allow fastbootd functionfs:dir search;
allow fastbootd functionfs:file rw_file_perms;
allowxperm fastbootd functionfs:file ioctl { FUNCTIONFS_ENDPOINT_DESC };
# Log to serial
allow fastbootd kmsg_device:chr_file { open getattr write };
# battery info
allow fastbootd sysfs_batteryinfo:file r_file_perms;
allow fastbootd device:dir r_dir_perms;
# For dev/block/by-name dir
allow fastbootd block_device:dir r_dir_perms;
# Needed for DM_DEV_CREATE ioctl call
allow fastbootd self:capability sys_admin;
unix_socket_connect(fastbootd, recovery, recovery)
# Required for flashing
allow fastbootd dm_device:chr_file rw_file_perms;
allow fastbootd dm_device:blk_file rw_file_perms;
allow fastbootd cache_block_device:blk_file rw_file_perms;
allow fastbootd super_block_device_type:blk_file rw_file_perms;
allow fastbootd {
boot_block_device
metadata_block_device
system_block_device
userdata_block_device
}:blk_file { w_file_perms getattr ioctl };
# For disabling/wiping GSI, and for modifying/deleting files created via
# libfiemap.
allow fastbootd metadata_block_device:blk_file r_file_perms;
allow fastbootd {rootfs tmpfs}:dir mounton;
allow fastbootd metadata_file:dir { search getattr mounton };
allow fastbootd gsi_metadata_file_type:dir rw_dir_perms;
allow fastbootd gsi_metadata_file_type:file create_file_perms;
allowxperm fastbootd super_block_device_type:blk_file ioctl { BLKIOMIN BLKALIGNOFF };
allowxperm fastbootd {
metadata_block_device
userdata_block_device
dm_device
cache_block_device
}:blk_file ioctl { BLKSECDISCARD BLKDISCARD };
allow fastbootd misc_block_device:blk_file rw_file_perms;
allow fastbootd proc_cmdline:file r_file_perms;
allow fastbootd rootfs:dir r_dir_perms;
# Needed to read fstab node from device tree.
allow fastbootd sysfs_dt_firmware_android:file r_file_perms;
allow fastbootd sysfs_dt_firmware_android:dir r_dir_perms;
# Needed because libdm reads sysfs to validate when a dm path is ready.
r_dir_file(fastbootd, sysfs_dm)
# Needed for realpath() call to resolve symlinks.
allow fastbootd block_device:dir getattr;
userdebug_or_eng(`
# Refined manipulation of /mnt/scratch, without these perms resorts
# to deleting scratch partition when partition(s) are flashed.
allow fastbootd self:process setfscreate;
allow fastbootd cache_file:dir search;
allow fastbootd proc_filesystems:file { getattr open read };
allow fastbootd self:capability sys_rawio;
allowxperm fastbootd dev_type:blk_file ioctl BLKROSET;
allow fastbootd overlayfs_file:dir { create_dir_perms mounton };
allow fastbootd {
system_file_type
unlabeled
vendor_file_type
}:dir { remove_name rmdir search write };
allow fastbootd {
overlayfs_file
system_file_type
unlabeled
vendor_file_type
}:{ file lnk_file } unlink;
allow fastbootd tmpfs:dir rw_dir_perms;
# Fetch vendor_boot partition
allow fastbootd boot_block_device:blk_file r_file_perms;
# popen(/system/bin/dmesg) and associated permissions. We only allow this
# on unlocked devices running userdebug builds.
allow fastbootd rootfs:file execute_no_trans;
allow fastbootd system_file:file execute_no_trans;
allow fastbootd kmsg_device:chr_file read;
allow fastbootd kernel:system syslog_read;
')
# Allow using libfiemap/gsid directly (no binder in recovery).
allow fastbootd gsi_metadata_file_type:dir search;
allow fastbootd ota_metadata_file:dir rw_dir_perms;
allow fastbootd ota_metadata_file:file create_file_perms;
')
# This capability allows fastbootd to circumvent memlock rlimits while using
# io_uring. An Alternative would be to up the memlock rlimit for the fastbootd service.
allow fastbootd self:capability ipc_lock;
io_uring_use(fastbootd)
###
### neverallow rules
###
# Write permission is required to wipe userdata
# until recovery supports vold.
neverallow fastbootd {
data_file_type
}:file { no_x_file_perms };

View file

@ -165,3 +165,27 @@ type pre_reboot_dexopt_file, file_type;
# Type for /mnt/artd_tmp in the Pre-reboot Dexopt chroot
# This type is set on the directory through the `rootcontext=` mount option.
type pre_reboot_dexopt_artd_file, file_type;
# Allow files to be created in their appropriate filesystems.
allow fs_type self:filesystem associate;
allow cgroup tmpfs:filesystem associate;
allow cgroup_v2 tmpfs:filesystem associate;
allow cgroup_rc_file tmpfs:filesystem associate;
allow sysfs_type sysfs:filesystem associate;
allow debugfs_type { debugfs debugfs_tracing debugfs_tracing_debug }:filesystem associate;
allow file_type labeledfs:filesystem associate;
allow file_type tmpfs:filesystem associate;
allow file_type rootfs:filesystem associate;
allow dev_type tmpfs:filesystem associate;
allow app_fuse_file app_fusefs:filesystem associate;
allow postinstall_file self:filesystem associate;
allow proc_net proc:filesystem associate;
# It's a bug to assign the file_type attribute and fs_type attribute
# to any type. Do not allow it.
#
# For example, the following is a bug:
# type apk_data_file, file_type, data_file_type, fs_type;
# Should be:
# type apk_data_file, file_type, data_file_type;
neverallow fs_type file_type:filesystem associate;

View file

@ -1,3 +1,27 @@
typeattribute fingerprintd coredomain;
init_daemon_domain(fingerprintd)
binder_use(fingerprintd)
# Scan through /system/lib64/hw looking for installed HALs
allow fingerprintd system_file:dir r_dir_perms;
# need to find KeyStore and add self
add_service(fingerprintd, fingerprintd_service)
# allow HAL module to read dir contents
allow fingerprintd fingerprintd_data_file:file { create_file_perms };
# allow HAL module to read/write/unlink contents of this dir
allow fingerprintd fingerprintd_data_file:dir rw_dir_perms;
# Need to add auth tokens to KeyStore
use_keystore(fingerprintd)
allow fingerprintd keystore:keystore2 { add_auth };
# For permissions checking
binder_call(fingerprintd, system_server);
allow fingerprintd permission_service:service_manager find;
allow fingerprintd ion_device:chr_file r_file_perms;

View file

@ -36,6 +36,18 @@ set_prop(flags_health_check, device_config_camera_native_prop)
set_prop(flags_health_check, device_config_tethering_u_or_later_native_prop)
set_prop(flags_health_check, next_boot_prop)
allow flags_health_check server_configurable_flags_data_file:dir rw_dir_perms;
allow flags_health_check server_configurable_flags_data_file:file create_file_perms;
###
### Neverallow rules
###
# server_configurable_flags_data_file is used for storing whether server configurable flags which
# have been reset during current booting. Mistakenly modified by unrelated components can
# cause bad server configurable flags synced back to device.
neverallow { domain -init -flags_health_check } server_configurable_flags_data_file:file no_w_file_perms;
# system property device_config_boot_count_prop is used for deciding when to perform server
# configurable flags related disaster recovery. Mistakenly set up by unrelated components can, at a
# wrong timing, trigger server configurable flag related disaster recovery, which will override

View file

@ -3,3 +3,77 @@ typeattribute fsck coredomain;
init_daemon_domain(fsck)
allow fsck metadata_block_device:blk_file rw_file_perms;
# /dev/__null__ created by init prior to policy load,
# open fd inherited by fsck.
allow fsck tmpfs:chr_file { read write ioctl };
# Inherit and use pty created by android_fork_execvp_ext().
allow fsck devpts:chr_file { read write ioctl getattr };
# Allow stdin/out back to vold
allow fsck vold:fd use;
allow fsck vold:fifo_file { read write getattr };
# Run fsck on certain block devices
allow fsck userdata_block_device:blk_file rw_file_perms;
allow fsck cache_block_device:blk_file rw_file_perms;
allow fsck dm_device:blk_file rw_file_perms;
allow fsck zoned_block_device:blk_file rw_file_perms;
userdebug_or_eng(`
allow fsck system_block_device:blk_file rw_file_perms;
')
# e2fsck performs a comprehensive search of /proc/mounts to check whether the
# checked filesystem is currently mounted.
allow fsck metadata_file:dir getattr;
allow fsck block_device:dir search;
allow fsck mirror_data_file:dir search;
# For the block devices where we have ioctl access,
# allow at a minimum the following common fsck ioctls.
allowxperm fsck dev_type:blk_file ioctl {
BLKDISCARDZEROES
BLKROGET
BLKREPORTZONE
};
# To determine if it is safe to run fsck on a filesystem, e2fsck
# must first determine if the filesystem is mounted. To do that,
# e2fsck scans through /proc/mounts and collects all the mounted
# block devices. With that information, it runs stat() on each block
# device, comparing the major and minor numbers to the filesystem
# passed in on the command line. If there is a match, then the filesystem
# is currently mounted and running fsck is dangerous.
# Allow stat access to all block devices so that fsck can compare
# major/minor values.
allow fsck dev_type:blk_file getattr;
allow fsck {
proc_mounts
proc_swaps
sysfs_dm
}:file r_file_perms;
allow fsck rootfs:dir r_dir_perms;
allow fsck sysfs_dm:dir r_dir_perms;
###
### neverallow rules
###
# fsck should never be run on these block devices
neverallow fsck {
boot_block_device
frp_block_device
recovery_block_device
root_block_device
swap_block_device
system_block_device
userdebug_or_eng(`-system_block_device')
vold_device
}:blk_file no_rw_file_perms;
# Only allow entry from init or vold via fsck binaries
neverallow { domain -init -vold } fsck:process transition;
neverallow * fsck:process dyntransition;
neverallow fsck { file_type fs_type -fsck_exec }:file entrypoint;

View file

@ -1 +1,66 @@
typeattribute fsck_untrusted coredomain;
# Inherit and use pty created by android_fork_execvp_ext().
allow fsck_untrusted devpts:chr_file { read write ioctl getattr };
# Allow stdin/out back to vold
allow fsck_untrusted vold:fd use;
allow fsck_untrusted vold:fifo_file { read write getattr };
# Run fsck on vold block devices
allow fsck_untrusted block_device:dir search;
allow fsck_untrusted vold_device:blk_file rw_file_perms;
allow fsck_untrusted proc_mounts:file r_file_perms;
# To determine if it is safe to run fsck on a filesystem, e2fsck
# must first determine if the filesystem is mounted. To do that,
# e2fsck scans through /proc/mounts and collects all the mounted
# block devices. With that information, it runs stat() on each block
# device, comparing the major and minor numbers to the filesystem
# passed in on the command line. If there is a match, then the filesystem
# is currently mounted and running fsck is dangerous.
# Allow stat access to all block devices so that fsck can compare
# major/minor values.
allow fsck_untrusted dev_type:blk_file getattr;
###
### neverallow rules
###
# Untrusted fsck should never be run on block devices holding sensitive data
neverallow fsck_untrusted {
boot_block_device
frp_block_device
metadata_block_device
recovery_block_device
root_block_device
swap_block_device
system_block_device
userdata_block_device
cache_block_device
dm_device
}:blk_file no_rw_file_perms;
# Only allow entry from vold via fsck binaries
neverallow { domain -vold } fsck_untrusted:process transition;
neverallow * fsck_untrusted:process dyntransition;
neverallow fsck_untrusted { file_type fs_type -fsck_exec }:file entrypoint;
# fsck_untrusted should never have sys_admin permissions. If it requires sys_admin
# permissions, that is a code mistake that needs to be fixed, not a permission that
# should be granted. Same with setgid and setuid.
neverallow fsck_untrusted self:global_capability_class_set { setgid setuid sys_admin };
###
### dontaudit rules
###
# Ignores attempts to access sysfs. fsck binaries seem to like trying to go
# here, but nothing bad happens if they can't, and they shouldn't be allowed.
dontaudit fsck_untrusted sysfs:file rw_file_perms;
dontaudit fsck_untrusted sysfs_dm:file rw_file_perms;
dontaudit fsck_untrusted sysfs_dm:dir rw_dir_perms;
# Ignore attempts to access tmpfs. fsck don't need to do this.
dontaudit fsck_untrusted tmpfs:lnk_file read;

View file

@ -4,3 +4,42 @@ init_daemon_domain(gatekeeperd)
# For checking whether GSI is running
get_prop(gatekeeperd, gsid_prop)
# gatekeeperd
binder_service(gatekeeperd)
binder_use(gatekeeperd)
### Rules needed when Gatekeeper HAL runs inside gatekeeperd process.
### These rules should eventually be granted only when needed.
allow gatekeeperd ion_device:chr_file r_file_perms;
# Load HAL implementation
allow gatekeeperd system_file:dir r_dir_perms;
###
### Rules needed when Gatekeeper HAL runs outside of gatekeeperd process.
### These rules should eventually be granted only when needed.
hal_client_domain(gatekeeperd, hal_gatekeeper)
###
# need to find KeyStore and add self
add_service(gatekeeperd, gatekeeper_service)
# Need to add auth tokens to KeyStore
use_keystore(gatekeeperd)
allow gatekeeperd keystore:keystore2 { add_auth };
allow gatekeeperd authorization_service:service_manager find;
# For permissions checking
allow gatekeeperd system_server:binder call;
allow gatekeeperd permission_service:service_manager find;
# for SID file access
allow gatekeeperd gatekeeper_data_file:dir rw_dir_perms;
allow gatekeeperd gatekeeper_data_file:file create_file_perms;
# For hardware properties retrieval
allow gatekeeperd hardware_properties_service:service_manager find;
r_dir_file(gatekeeperd, cgroup)
r_dir_file(gatekeeperd, cgroup_v2)

View file

@ -0,0 +1,38 @@
# HwBinder IPC from client to server, and callbacks
binder_call(hal_graphics_composer_client, hal_graphics_composer_server)
binder_call(hal_graphics_composer_server, hal_graphics_composer_client)
allow hal_graphics_composer_client hal_graphics_composer_server_tmpfs:file { getattr map read write };
allow hal_graphics_composer_server hal_graphics_composer_client_tmpfs:file { getattr map read write };
hal_attribute_hwservice(hal_graphics_composer, hal_graphics_composer_hwservice)
# Coordinate with hal_graphics_mapper
allow hal_graphics_composer_server hal_graphics_mapper_hwservice:hwservice_manager find;
# GPU device access
allow hal_graphics_composer gpu_device:chr_file rw_file_perms;
allow hal_graphics_composer gpu_device:dir r_dir_perms;
allow hal_graphics_composer ion_device:chr_file r_file_perms;
allow hal_graphics_composer dmabuf_system_heap_device:chr_file r_file_perms;
allow hal_graphics_composer hal_graphics_allocator:fd use;
# Access /dev/graphics/fb0.
allow hal_graphics_composer graphics_device:dir search;
allow hal_graphics_composer graphics_device:chr_file rw_file_perms;
# Fences
allow hal_graphics_composer system_server:fd use;
allow hal_graphics_composer bootanim:fd use;
allow hal_graphics_composer appdomain:fd use;
# allow self to set SCHED_FIFO
allow hal_graphics_composer self:global_capability_class_set sys_nice;
# allow surfaceflinger to use a pipe for dumpsys output
allow hal_graphics_composer_server hal_graphics_composer_client:fifo_file write;
binder_call(hal_graphics_composer_client, servicemanager)
binder_call(hal_graphics_composer_server, servicemanager)
hal_attribute_service(hal_graphics_composer, hal_graphics_composer_service)

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