335d704c77
This adds rules required for apexd to perform snapshot and restore of the new apex data directories. See go/apex-data-directories for more information on the feature. See the chain of CLs up to ag/10169468 for the implementation of snapshot and restore. Bug: 141148175 Test: atest StagedRollbackTest#testRollbackApexDataDirectories_DeSys Test: atest StagedRollbackTest#testRollbackApexDataDirectories_DeUser Test: atest StagedRollbackTest#testRollbackApexDataDirectories_Ce Change-Id: I1756bbc1d80cad7cf9c2cebcee9bee6bc261728c
363 lines
10 KiB
Plaintext
363 lines
10 KiB
Plaintext
# Transition to crash_dump when /system/bin/crash_dump* is executed.
|
|
# This occurs when the process crashes.
|
|
# We do not apply this to the su domain to avoid interfering with
|
|
# tests (b/114136122)
|
|
domain_auto_trans({ domain userdebug_or_eng(`-su') }, crash_dump_exec, crash_dump);
|
|
allow domain crash_dump:process sigchld;
|
|
|
|
# Allow every process to check the heapprofd.enable properties to determine
|
|
# whether to load the heap profiling library. This does not necessarily enable
|
|
# heap profiling, as initialization will fail if it does not have the
|
|
# necessary SELinux permissions.
|
|
get_prop(domain, heapprofd_prop);
|
|
# Allow heap profiling on debug builds.
|
|
userdebug_or_eng(`can_profile_heap_userdebug_or_eng({
|
|
domain
|
|
-bpfloader
|
|
-init
|
|
-kernel
|
|
-keystore
|
|
-llkd
|
|
-logd
|
|
-logpersist
|
|
-recovery
|
|
-recovery_persist
|
|
-recovery_refresh
|
|
-ueventd
|
|
-vendor_init
|
|
-vold
|
|
})')
|
|
|
|
# As above, allow perf profiling most processes on debug builds.
|
|
# Do not diverge the two lists without a really good reason.
|
|
userdebug_or_eng(`can_profile_perf({
|
|
domain
|
|
-bpfloader
|
|
-init
|
|
-kernel
|
|
-keystore
|
|
-llkd
|
|
-logd
|
|
-logpersist
|
|
-recovery
|
|
-recovery_persist
|
|
-recovery_refresh
|
|
-ueventd
|
|
-vendor_init
|
|
-vold
|
|
})')
|
|
|
|
# Path resolution access in cgroups.
|
|
allow domain cgroup:dir search;
|
|
allow { domain -appdomain -rs } cgroup:dir w_dir_perms;
|
|
allow { domain -appdomain -rs } cgroup:file w_file_perms;
|
|
|
|
allow domain cgroup_rc_file:dir search;
|
|
allow domain cgroup_rc_file:file r_file_perms;
|
|
allow domain task_profiles_file:file r_file_perms;
|
|
allow domain vendor_task_profiles_file:file r_file_perms;
|
|
|
|
# Allow all domains to read sys.use_memfd to determine
|
|
# if memfd support can be used if device supports it
|
|
get_prop(domain, use_memfd_prop);
|
|
|
|
# Allow to read properties for linker
|
|
get_prop(domain, linker_prop);
|
|
|
|
# Read access to sdkextensions props
|
|
get_prop(domain, module_sdkextensions_prop)
|
|
|
|
# For now, everyone can access core property files
|
|
# Device specific properties are not granted by default
|
|
not_compatible_property(`
|
|
get_prop(domain, core_property_type)
|
|
get_prop(domain, exported_dalvik_prop)
|
|
get_prop(domain, exported_ffs_prop)
|
|
get_prop(domain, exported_system_radio_prop)
|
|
get_prop(domain, exported2_config_prop)
|
|
get_prop(domain, exported2_radio_prop)
|
|
get_prop(domain, exported2_system_prop)
|
|
get_prop(domain, exported2_vold_prop)
|
|
get_prop(domain, exported3_default_prop)
|
|
get_prop(domain, exported3_radio_prop)
|
|
get_prop(domain, exported3_system_prop)
|
|
get_prop(domain, vendor_default_prop)
|
|
')
|
|
compatible_property_only(`
|
|
get_prop({coredomain appdomain shell}, core_property_type)
|
|
get_prop({coredomain appdomain shell}, exported_dalvik_prop)
|
|
get_prop({coredomain appdomain shell}, exported_ffs_prop)
|
|
get_prop({coredomain appdomain shell}, exported_system_radio_prop)
|
|
get_prop({coredomain appdomain shell}, exported2_config_prop)
|
|
get_prop({coredomain appdomain shell}, exported2_radio_prop)
|
|
get_prop({coredomain appdomain shell}, exported2_system_prop)
|
|
get_prop({coredomain appdomain shell}, exported2_vold_prop)
|
|
get_prop({coredomain appdomain shell}, exported3_default_prop)
|
|
get_prop({coredomain appdomain shell}, exported3_radio_prop)
|
|
get_prop({coredomain appdomain shell}, exported3_system_prop)
|
|
get_prop({coredomain appdomain shell}, exported_camera_prop)
|
|
get_prop({coredomain appdomain shell}, userspace_reboot_config_prop)
|
|
get_prop({coredomain shell}, userspace_reboot_exported_prop)
|
|
get_prop({coredomain shell}, userspace_reboot_prop)
|
|
get_prop({domain -coredomain -appdomain}, vendor_default_prop)
|
|
')
|
|
|
|
# Allow access to fsverity keyring.
|
|
allow domain kernel:key search;
|
|
# Allow access to keys in the fsverity keyring that were installed at boot.
|
|
allow domain fsverity_init:key search;
|
|
# For testing purposes, allow access to keys installed with su.
|
|
userdebug_or_eng(`
|
|
allow domain su:key search;
|
|
')
|
|
|
|
# Allow access to linkerconfig file
|
|
allow domain linkerconfig_file:dir search;
|
|
allow domain linkerconfig_file:file r_file_perms;
|
|
|
|
# Allow all processes to check for the existence of the boringssl_self_test_marker files.
|
|
allow domain boringssl_self_test_marker:dir search;
|
|
|
|
# Limit ability to ptrace or read sensitive /proc/pid files of processes
|
|
# with other UIDs to these whitelisted domains.
|
|
neverallow {
|
|
domain
|
|
-vold
|
|
userdebug_or_eng(`-llkd')
|
|
-dumpstate
|
|
userdebug_or_eng(`-incidentd')
|
|
-storaged
|
|
-system_server
|
|
} self:global_capability_class_set sys_ptrace;
|
|
|
|
# Limit ability to generate hardware unique device ID attestations to priv_apps
|
|
neverallow { domain -priv_app -gmscore_app } *:keystore_key gen_unique_id;
|
|
|
|
neverallow {
|
|
domain
|
|
-init
|
|
-vendor_init
|
|
userdebug_or_eng(`-domain')
|
|
} debugfs_tracing_debug:file no_rw_file_perms;
|
|
|
|
# System_server owns dropbox data, and init creates/restorecons the directory
|
|
# Disallow direct access by other processes.
|
|
neverallow { domain -init -system_server } dropbox_data_file:dir *;
|
|
neverallow { domain -init -system_server } dropbox_data_file:file ~{ getattr read };
|
|
|
|
###
|
|
# Services should respect app sandboxes
|
|
neverallow {
|
|
domain
|
|
-appdomain
|
|
-installd # creation of sandbox
|
|
} { privapp_data_file app_data_file }:dir_file_class_set { create unlink };
|
|
|
|
# Only the following processes should be directly accessing private app
|
|
# directories.
|
|
neverallow {
|
|
domain
|
|
-adbd
|
|
-appdomain
|
|
-app_zygote
|
|
-dexoptanalyzer
|
|
-installd
|
|
-iorap_prefetcherd
|
|
-profman
|
|
-rs # spawned by appdomain, so carryover the exception above
|
|
-runas
|
|
-system_server
|
|
-viewcompiler
|
|
-zygote
|
|
} { privapp_data_file app_data_file }:dir *;
|
|
|
|
# Only apps should be modifying app data. installd is exempted for
|
|
# restorecon and package install/uninstall.
|
|
neverallow {
|
|
domain
|
|
-appdomain
|
|
-installd
|
|
-rs # spawned by appdomain, so carryover the exception above
|
|
} { privapp_data_file app_data_file }:dir ~r_dir_perms;
|
|
|
|
neverallow {
|
|
domain
|
|
-appdomain
|
|
-app_zygote
|
|
-installd
|
|
-iorap_prefetcherd
|
|
-rs # spawned by appdomain, so carryover the exception above
|
|
} { privapp_data_file app_data_file }:file_class_set open;
|
|
|
|
neverallow {
|
|
domain
|
|
-appdomain
|
|
-installd # creation of sandbox
|
|
} { privapp_data_file app_data_file }:dir_file_class_set { create unlink };
|
|
|
|
neverallow {
|
|
domain
|
|
-installd
|
|
} { privapp_data_file app_data_file }:dir_file_class_set { relabelfrom relabelto };
|
|
|
|
# The staging directory contains APEX and APK files. It is important to ensure
|
|
# that these files cannot be accessed by other domains to ensure that the files
|
|
# do not change between system_server staging the files and apexd processing
|
|
# the files.
|
|
neverallow { domain -init -system_server -apexd -installd} staging_data_file:dir *;
|
|
neverallow { domain -init -system_app -system_server -apexd -kernel -installd } staging_data_file:file *;
|
|
neverallow { domain -init -system_server -installd} staging_data_file:dir no_w_dir_perms;
|
|
# apexd needs the link and unlink permissions, so list every `no_w_file_perms`
|
|
# except for `link` and `unlink`.
|
|
neverallow { domain -init -system_server } staging_data_file:file
|
|
{ append create relabelfrom rename setattr write no_x_file_perms };
|
|
|
|
neverallow {
|
|
domain
|
|
-appdomain # for oemfs
|
|
-bootanim # for oemfs
|
|
-recovery # for /tmp/update_binary in tmpfs
|
|
} { fs_type -rootfs }:file execute;
|
|
|
|
#
|
|
# Assert that, to the extent possible, we're not loading executable content from
|
|
# outside the rootfs or /system partition except for a few whitelisted domains.
|
|
# Executable files loaded from /data is a persistence vector
|
|
# we want to avoid. See
|
|
# https://bugs.chromium.org/p/project-zero/issues/detail?id=955 for example.
|
|
#
|
|
neverallow {
|
|
domain
|
|
-appdomain
|
|
with_asan(`-asan_extract')
|
|
-iorap_prefetcherd
|
|
-shell
|
|
userdebug_or_eng(`-su')
|
|
-system_server_startup # for memfd backed executable regions
|
|
-app_zygote
|
|
-webview_zygote
|
|
-zygote
|
|
userdebug_or_eng(`-mediaextractor')
|
|
userdebug_or_eng(`-mediaswcodec')
|
|
} {
|
|
file_type
|
|
-system_file_type
|
|
-system_lib_file
|
|
-system_linker_exec
|
|
-vendor_file_type
|
|
-exec_type
|
|
-postinstall_file
|
|
}:file execute;
|
|
|
|
# Only init is allowed to write cgroup.rc file
|
|
neverallow {
|
|
domain
|
|
-init
|
|
-vendor_init
|
|
} cgroup_rc_file:file no_w_file_perms;
|
|
|
|
# Only authorized processes should be writing to files in /data/dalvik-cache
|
|
neverallow {
|
|
domain
|
|
-init # TODO: limit init to relabelfrom for files
|
|
-zygote
|
|
-installd
|
|
-postinstall_dexopt
|
|
-cppreopts
|
|
-dex2oat
|
|
-otapreopt_slot
|
|
-art_apex_postinstall
|
|
-art_apex_boot_integrity
|
|
} dalvikcache_data_file:file no_w_file_perms;
|
|
|
|
neverallow {
|
|
domain
|
|
-init
|
|
-installd
|
|
-postinstall_dexopt
|
|
-cppreopts
|
|
-dex2oat
|
|
-zygote
|
|
-otapreopt_slot
|
|
-art_apex_boot_integrity
|
|
-art_apex_postinstall
|
|
} dalvikcache_data_file:dir no_w_dir_perms;
|
|
|
|
# Minimize dac_override and dac_read_search.
|
|
# Instead of granting them it is usually better to add the domain to
|
|
# a Unix group or change the permissions of a file.
|
|
define(`dac_override_allowed', `{
|
|
apexd
|
|
dnsmasq
|
|
dumpstate
|
|
init
|
|
installd
|
|
userdebug_or_eng(`llkd')
|
|
lmkd
|
|
migrate_legacy_obb_data
|
|
netd
|
|
postinstall_dexopt
|
|
recovery
|
|
rss_hwm_reset
|
|
sdcardd
|
|
tee
|
|
ueventd
|
|
uncrypt
|
|
vendor_init
|
|
vold
|
|
vold_prepare_subdirs
|
|
zygote
|
|
}')
|
|
neverallow ~dac_override_allowed self:global_capability_class_set dac_override;
|
|
# Since the kernel checks dac_read_search before dac_override, domains that
|
|
# have dac_override should also have dac_read_search to eliminate spurious
|
|
# denials. Some domains have dac_read_search without having dac_override, so
|
|
# this list should be a superset of the one above.
|
|
neverallow ~{
|
|
dac_override_allowed
|
|
iorap_prefetcherd
|
|
traced_perf
|
|
traced_probes
|
|
userdebug_or_eng(`heapprofd')
|
|
} self:global_capability_class_set dac_read_search;
|
|
|
|
# Limit what domains can mount filesystems or change their mount flags.
|
|
# sdcard_type / vfat is exempt as a larger set of domains need
|
|
# this capability, including device-specific domains.
|
|
neverallow {
|
|
domain
|
|
-apexd
|
|
recovery_only(`userdebug_or_eng(`-fastbootd')')
|
|
-init
|
|
-kernel
|
|
-otapreopt_chroot
|
|
-recovery
|
|
-update_engine
|
|
-vold
|
|
-zygote
|
|
} { fs_type -sdcard_type }:filesystem { mount remount relabelfrom relabelto };
|
|
|
|
# Limit raw I/O to these whitelisted domains. Do not apply to debug builds.
|
|
neverallow {
|
|
domain
|
|
userdebug_or_eng(`-domain')
|
|
-kernel
|
|
-gsid
|
|
-init
|
|
-recovery
|
|
-ueventd
|
|
-healthd
|
|
-uncrypt
|
|
-tee
|
|
-hal_bootctl_server
|
|
-fastbootd
|
|
} self:global_capability_class_set sys_rawio;
|
|
|
|
# Limit directory operations that doesn't need to do app data isolation.
|
|
neverallow {
|
|
domain
|
|
-init
|
|
-installd
|
|
-zygote
|
|
} mirror_data_file:dir *;
|