9b2e0cbeea
In kernel 4.7, the capability and capability2 classes were split apart
from cap_userns and cap2_userns (see kernel commit
8e4ff6f228e4722cac74db716e308d1da33d744f). Since then, Android cannot be
run in a container with SELinux in enforcing mode.
This change applies the existing capability rules to user namespaces as
well as the root namespace so that Android running in a container
behaves the same on pre- and post-4.7 kernels.
This is essentially:
1. New global_capability_class_set and global_capability2_class_set
that match capability+cap_userns and capability2+cap2_userns,
respectively.
2. s/self:capability/self:global_capability_class_set/g
3. s/self:capability2/self:global_capability2_class_set/g
4. Add cap_userns and cap2_userns to the existing capability_class_set
so that it covers all capabilities. This set was used by several
neverallow and dontaudit rules, and I confirmed that the new
classes are still appropriate.
Test: diff new policy against old and confirm that all new rules add
only cap_userns or cap2_userns;
Boot ARC++ on a device with the 4.12 kernel.
Bug: crbug.com/754831
Change-Id: I4007eb3a2ecd01b062c4c78d9afee71c530df95f
143 lines
4.6 KiB
Text
143 lines
4.6 KiB
Text
### ADB daemon
|
|
|
|
typeattribute adbd coredomain;
|
|
typeattribute adbd mlstrustedsubject;
|
|
|
|
init_daemon_domain(adbd)
|
|
|
|
domain_auto_trans(adbd, shell_exec, shell)
|
|
|
|
userdebug_or_eng(`
|
|
allow adbd self:process setcurrent;
|
|
allow adbd su:process dyntransition;
|
|
')
|
|
|
|
# Do not sanitize the environment or open fds of the shell. Allow signaling
|
|
# created processes.
|
|
allow adbd shell:process { noatsecure signal };
|
|
|
|
# Set UID and GID to shell. Set supplementary groups.
|
|
allow adbd self:global_capability_class_set { setuid setgid };
|
|
|
|
# Drop capabilities from bounding set on user builds.
|
|
allow adbd self:global_capability_class_set setpcap;
|
|
|
|
# Create and use network sockets.
|
|
net_domain(adbd)
|
|
|
|
# Access /dev/usb-ffs/adb/ep0
|
|
allow adbd functionfs:dir search;
|
|
allow adbd functionfs:file rw_file_perms;
|
|
|
|
# Use a pseudo tty.
|
|
allow adbd devpts:chr_file rw_file_perms;
|
|
|
|
# adb push/pull /data/local/tmp.
|
|
allow adbd shell_data_file:dir create_dir_perms;
|
|
allow adbd shell_data_file:file create_file_perms;
|
|
|
|
# adb pull /data/misc/profman.
|
|
allow adbd profman_dump_data_file:dir r_dir_perms;
|
|
allow adbd profman_dump_data_file:file r_file_perms;
|
|
|
|
# adb push/pull sdcard.
|
|
allow adbd tmpfs:dir search;
|
|
allow adbd rootfs:lnk_file r_file_perms; # /sdcard symlink
|
|
allow adbd tmpfs:lnk_file r_file_perms; # /mnt/sdcard symlink
|
|
allow adbd sdcard_type:dir create_dir_perms;
|
|
allow adbd sdcard_type:file create_file_perms;
|
|
|
|
# adb pull /data/anr/traces.txt
|
|
allow adbd anr_data_file:dir r_dir_perms;
|
|
allow adbd anr_data_file:file r_file_perms;
|
|
|
|
# Set service.adb.*, sys.powerctl, and sys.usb.ffs.ready properties.
|
|
set_prop(adbd, shell_prop)
|
|
set_prop(adbd, powerctl_prop)
|
|
set_prop(adbd, ffs_prop)
|
|
|
|
# Access device logging gating property
|
|
get_prop(adbd, device_logging_prop)
|
|
|
|
# Read device's serial number from system properties
|
|
get_prop(adbd, serialno_prop)
|
|
|
|
# Run /system/bin/bu
|
|
allow adbd system_file:file rx_file_perms;
|
|
|
|
# Perform binder IPC to surfaceflinger (screencap)
|
|
# XXX Run screencap in a separate domain?
|
|
binder_use(adbd)
|
|
binder_call(adbd, surfaceflinger)
|
|
# b/13188914
|
|
allow adbd gpu_device:chr_file rw_file_perms;
|
|
allow adbd ion_device:chr_file rw_file_perms;
|
|
r_dir_file(adbd, system_file)
|
|
|
|
# Needed for various screenshots
|
|
hal_client_domain(adbd, hal_graphics_allocator)
|
|
|
|
# Read /data/misc/adb/adb_keys.
|
|
allow adbd adb_keys_file:dir search;
|
|
allow adbd adb_keys_file:file r_file_perms;
|
|
|
|
userdebug_or_eng(`
|
|
# Write debugging information to /data/adb
|
|
# when persist.adb.trace_mask is set
|
|
# https://code.google.com/p/android/issues/detail?id=72895
|
|
allow adbd adb_data_file:dir rw_dir_perms;
|
|
allow adbd adb_data_file:file create_file_perms;
|
|
')
|
|
|
|
# ndk-gdb invokes adb forward to forward the gdbserver socket.
|
|
allow adbd app_data_file:dir search;
|
|
allow adbd app_data_file:sock_file write;
|
|
allow adbd appdomain:unix_stream_socket connectto;
|
|
|
|
# ndk-gdb invokes adb pull of app_process, linker, and libc.so.
|
|
allow adbd zygote_exec:file r_file_perms;
|
|
allow adbd system_file:file r_file_perms;
|
|
|
|
# Allow pulling the SELinux policy for CTS purposes
|
|
allow adbd selinuxfs:dir r_dir_perms;
|
|
allow adbd selinuxfs:file r_file_perms;
|
|
allow adbd kernel:security read_policy;
|
|
allow adbd service_contexts_file:file r_file_perms;
|
|
allow adbd file_contexts_file:file r_file_perms;
|
|
allow adbd seapp_contexts_file:file r_file_perms;
|
|
allow adbd property_contexts_file:file r_file_perms;
|
|
allow adbd sepolicy_file:file r_file_perms;
|
|
|
|
# Allow pulling config.gz for CTS purposes
|
|
allow adbd config_gz:file r_file_perms;
|
|
|
|
allow adbd surfaceflinger_service:service_manager find;
|
|
allow adbd bootchart_data_file:dir search;
|
|
allow adbd bootchart_data_file:file r_file_perms;
|
|
|
|
# Allow access to external storage; we have several visible mount points under /storage
|
|
# and symlinks to primary storage at places like /storage/sdcard0 and /mnt/user/0/primary
|
|
allow adbd storage_file:dir r_dir_perms;
|
|
allow adbd storage_file:lnk_file r_file_perms;
|
|
allow adbd mnt_user_file:dir r_dir_perms;
|
|
allow adbd mnt_user_file:lnk_file r_file_perms;
|
|
|
|
# Access to /data/media.
|
|
# This should be removed if sdcardfs is modified to alter the secontext for its
|
|
# accesses to the underlying FS.
|
|
allow adbd media_rw_data_file:dir create_dir_perms;
|
|
allow adbd media_rw_data_file:file create_file_perms;
|
|
|
|
r_dir_file(adbd, apk_data_file)
|
|
|
|
allow adbd rootfs:dir r_dir_perms;
|
|
|
|
###
|
|
### Neverallow rules
|
|
###
|
|
|
|
# No transitions from adbd to non-shell, non-crash_dump domains. adbd only ever
|
|
# transitions to the shell domain (except when it crashes). In particular, we
|
|
# 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') }:process dyntransition;
|