platform_system_sepolicy/private/artd.te
Jiakai Zhang c871c1cc75 Update SELinux policy for app compilation CUJ.
- Adapt installd rules for app compilation.

- Add profman rules for checking the profile before compilation. This is new behavior compared to installd.

Bug: 229268202
Test: -
  1. adb shell pm art optimize-package -m speed-profile -f \
       com.google.android.youtube
  2. See no SELinux denial.
Change-Id: Idfe1ccdb1b27fd275fdf912bc8d005551f89d4fc
2022-07-29 14:07:52 +00:00

79 lines
3.2 KiB
Text

# ART service daemon.
typeattribute artd coredomain;
type artd_exec, system_file_type, exec_type, file_type;
type artd_tmpfs, file_type;
# Allow artd to publish a binder service and make binder calls.
binder_use(artd)
add_service(artd, artd_service)
allow artd dumpstate:fifo_file { getattr write };
init_daemon_domain(artd)
# Allow query ART device config properties
get_prop(artd, device_config_runtime_native_prop)
get_prop(artd, device_config_runtime_native_boot_prop)
# Access to "odsign.verification.success" for deciding whether to deny files in
# the ART APEX data directory.
get_prop(artd, odsign_prop)
# Reading an APK opens a ZipArchive, which unpack to tmpfs.
# Use tmpfs_domain() which will give tmpfs files created by artd their
# own label, which differs from other labels created by other processes.
# This allows to distinguish in policy files created by artd vs other
# processes.
tmpfs_domain(artd)
# Allow testing userfaultfd support.
userfaultfd_use(artd)
# Read access to primary dex'es on writable partitions (e.g., /data/app/...).
r_dir_file(artd, apk_data_file)
# Read access to /vendor/app.
r_dir_file(artd, vendor_app_file)
# Read/write access to all compilation artifacts generated on device for apps'
# primary dex'es. (/data/dalvik-cache/..., /data/app/.../oat/..., etc.)
allow artd dalvikcache_data_file:dir create_dir_perms;
allow artd dalvikcache_data_file:file create_file_perms;
# Read access to the ART APEX data directory.
# Needed for reading the boot image generated on device.
allow artd apex_module_data_file:dir { getattr search };
r_dir_file(artd, apex_art_data_file)
# Read access to /apex/apex-info-list.xml
# Needed for getting APEX versions.
allow artd apex_info_file:file r_file_perms;
# Allow getting root capabilities to bypass permission checks.
# - "dac_override" and "dac_read_search" are for
# - reading secondary dex'es in app data directories (reading primary dex'es
# doesn't need root capabilities)
# - managing (CRUD) compilation artifacts in both APK directories for primary
# dex'es and in app data directories for secondary dex'es
# - managing (CRUD) profile files for both primary dex'es and secondary dex'es
# - "fowner" is for adjusting the file permissions of compilation artifacts and
# profile files based on whether they include user data or not.
# - "chown" is for transferring the ownership of compilation artifacts and
# profile files to the system or apps.
allow artd self:global_capability_class_set { dac_override dac_read_search fowner chown };
# Read/write access to profiles (/data/misc/profiles/{ref,cur}/...).
allow artd user_profile_data_file:dir { getattr search };
allow artd user_profile_data_file:file create_file_perms;
# Never allow running other binaries without a domain transition.
# The only exception is art_exec. It is allowed to use the artd domain because
# it is a thin wrapper that executes other binaries on behalf of artd.
neverallow artd ~{art_exec_exec}:file execute_no_trans;
allow artd art_exec_exec:file rx_file_perms;
# Allow running other binaries in their own domains.
domain_auto_trans(artd, profman_exec, profman)
domain_auto_trans(artd, dex2oat_exec, dex2oat)
# Allow sending sigkill to subprocesses.
allow artd { profman dex2oat }:process sigkill;