515 lines
17 KiB
Text
515 lines
17 KiB
Text
typeattribute shell coredomain, mlstrustedsubject;
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# allow shell input injection
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allow shell uhid_device:chr_file rw_file_perms;
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# systrace support - allow atrace to run
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allow shell debugfs_tracing_debug:dir r_dir_perms;
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allow shell debugfs_tracing:dir r_dir_perms;
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allow shell debugfs_tracing:file rw_file_perms;
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allow shell debugfs_trace_marker:file getattr;
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allow shell atrace_exec:file rx_file_perms;
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userdebug_or_eng(`
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allow shell debugfs_tracing_debug:file rw_file_perms;
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')
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# read config.gz for CTS purposes
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allow shell config_gz:file r_file_perms;
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# allow reading tombstones. users can already use bugreports to get those.
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allow shell tombstone_data_file:dir r_dir_perms;
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allow shell tombstone_data_file:file r_file_perms;
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# Run app_process.
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# XXX Transition into its own domain?
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app_domain(shell)
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# allow shell to call dumpsys storaged
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binder_call(shell, storaged)
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# Perform SELinux access checks, needed for CTS
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selinux_check_access(shell)
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selinux_check_context(shell)
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# Control Perfetto traced and obtain traces from it.
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# Needed for Studio and debugging.
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unix_socket_connect(shell, traced_consumer, traced)
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# Allow shell binaries to write trace data to Perfetto. Used for testing and
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# cmdline utils.
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perfetto_producer(shell)
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domain_auto_trans(shell, vendor_shell_exec, vendor_shell)
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# Allow shell binaries to exec the perfetto cmdline util and have that
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# transition into its own domain, so that it behaves consistently to
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# when exec()-d by statsd.
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domain_auto_trans(shell, perfetto_exec, perfetto)
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# Allow to send SIGINT to perfetto when daemonized.
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allow shell perfetto:process signal;
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# Allow shell to run adb shell cmd stats commands. Needed for CTS.
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binder_call(shell, statsd);
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# Allow shell to read and unlink traces stored in /data/misc/a11ytraces.
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userdebug_or_eng(`
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allow shell accessibility_trace_data_file:dir rw_dir_perms;
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allow shell accessibility_trace_data_file:file { r_file_perms unlink };
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')
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# Allow shell to read and unlink traces stored in /data/misc/perfetto-traces.
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allow shell perfetto_traces_data_file:dir rw_dir_perms;
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allow shell perfetto_traces_data_file:file { r_file_perms unlink };
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# ... and /data/misc/perfetto-traces/bugreport/ .
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allow shell perfetto_traces_bugreport_data_file:dir rw_dir_perms;
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allow shell perfetto_traces_bugreport_data_file:file { r_file_perms unlink };
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# Allow shell to create/remove configs stored in /data/misc/perfetto-configs.
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allow shell perfetto_configs_data_file:dir rw_dir_perms;
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allow shell perfetto_configs_data_file:file create_file_perms;
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# Allow shell to run adb shell cmd gpu commands.
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binder_call(shell, gpuservice);
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# Allow shell to use atrace HAL
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hal_client_domain(shell, hal_atrace)
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# For hostside tests such as CTS listening ports test.
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allow shell proc_net_tcp_udp:file r_file_perms;
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# The dl.exec_linker* tests need to execute /system/bin/linker
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# b/124789393
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allow shell system_linker_exec:file rx_file_perms;
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# Renderscript host side tests depend on being able to execute
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# /system/bin/bcc (b/126388046)
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allow shell rs_exec:file rx_file_perms;
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# Allow (host-driven) ART run-tests to execute dex2oat, in order to
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# check ART's compiler.
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allow shell dex2oat_exec:file rx_file_perms;
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allow shell dex2oat_exec:lnk_file read;
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# Allow shell to start and comminicate with lpdumpd.
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set_prop(shell, lpdumpd_prop);
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binder_call(shell, lpdumpd)
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# Allow shell to set and read value of properties used for CTS tests of
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# userspace reboot
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set_prop(shell, userspace_reboot_test_prop)
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# Allow shell to set this property to disable charging.
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set_prop(shell, power_debug_prop)
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# Allow shell to set this property used for rollback tests
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set_prop(shell, rollback_test_prop)
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# Allow shell to set RKP properties for testing purposes
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set_prop(shell, remote_prov_prop)
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# Allow shell to get encryption policy of /data/local/tmp/, for CTS
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allowxperm shell shell_data_file:dir ioctl {
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FS_IOC_GET_ENCRYPTION_POLICY
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FS_IOC_GET_ENCRYPTION_POLICY_EX
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};
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# Allow shell to execute simpleperf without a domain transition.
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allow shell simpleperf_exec:file rx_file_perms;
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userdebug_or_eng(`
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# Allow shell to execute profcollectctl without a domain transition.
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allow shell profcollectd_exec:file rx_file_perms;
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# Allow shell to read profcollectd data files.
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r_dir_file(shell, profcollectd_data_file)
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# Allow to issue control commands to profcollectd binder service.
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allow shell profcollectd:binder call;
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')
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# Allow shell to run remount command.
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allow shell remount_exec:file rx_file_perms;
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# Allow shell to call perf_event_open for profiling other shell processes, but
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# not the whole system.
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allow shell self:perf_event { open read write kernel };
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# Allow shell to read microdroid vendor image
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r_dir_file(shell, vendor_microdroid_file)
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# Allow shell to read /apex/apex-info-list.xml and the vendor apexes
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allow shell apex_info_file:file r_file_perms;
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allow shell vendor_apex_file:file r_file_perms;
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allow shell vendor_apex_file:dir r_dir_perms;
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allow shell vendor_apex_metadata_file:dir r_dir_perms;
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# Allow shell to read updated APEXes under /data/apex
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allow shell apex_data_file:dir search;
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allow shell staging_data_file:file r_file_perms;
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# Set properties.
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set_prop(shell, shell_prop)
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set_prop(shell, ctl_bugreport_prop)
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set_prop(shell, ctl_dumpstate_prop)
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set_prop(shell, dumpstate_prop)
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set_prop(shell, exported_dumpstate_prop)
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set_prop(shell, debug_prop)
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set_prop(shell, perf_drop_caches_prop)
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set_prop(shell, powerctl_prop)
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set_prop(shell, log_tag_prop)
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set_prop(shell, wifi_log_prop)
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# Allow shell to start/stop traced via the persist.traced.enable
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# property (which also takes care of /data/misc initialization).
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set_prop(shell, traced_enabled_prop)
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# adjust SELinux audit rates
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set_prop(shell, logd_auditrate_prop)
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# adjust is_loggable properties
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userdebug_or_eng(`set_prop(shell, log_prop)')
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# logpersist script
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userdebug_or_eng(`set_prop(shell, logpersistd_logging_prop)')
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# Allow shell to start/stop heapprofd via the persist.heapprofd.enable
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# property.
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set_prop(shell, heapprofd_enabled_prop)
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# Allow shell to start/stop traced_perf via the persist.traced_perf.enable
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# property.
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set_prop(shell, traced_perf_enabled_prop)
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# Allow shell to start/stop gsid via ctl.start|stop|restart gsid.
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set_prop(shell, ctl_gsid_prop)
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set_prop(shell, ctl_snapuserd_prop)
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# Allow shell to enable Dynamic System Update
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set_prop(shell, dynamic_system_prop)
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# Allow shell to mock an OTA using persist.pm.mock-upgrade
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set_prop(shell, mock_ota_prop)
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# Read device's serial number from system properties
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get_prop(shell, serialno_prop)
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# Allow shell to read the vendor security patch level for CTS
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get_prop(shell, vendor_security_patch_level_prop)
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# Read state of logging-related properties
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get_prop(shell, device_logging_prop)
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# Read state of boot reason properties
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get_prop(shell, bootloader_boot_reason_prop)
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get_prop(shell, last_boot_reason_prop)
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get_prop(shell, system_boot_reason_prop)
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# Allow shell to execute the remote key provisioning factory tool
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binder_call(shell, hal_keymint)
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# Allow reading the outcome of perf_event_open LSM support test for CTS.
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get_prop(shell, init_perf_lsm_hooks_prop)
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# Allow shell to read boot image timestamps and fingerprints.
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get_prop(shell, build_bootimage_prop)
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# Allow shell to read odsign verification properties
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get_prop(shell, odsign_prop)
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userdebug_or_eng(`set_prop(shell, persist_debug_prop)')
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# Allow shell to read the keystore key contexts files. Used by native tests to test label lookup.
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allow shell keystore2_key_contexts_file:file r_file_perms;
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# Allow shell to access the keystore2_key namespace shell_key. Mainly used for native tests.
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allow shell shell_key:keystore2_key { delete rebind use get_info update };
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# Allow shell to open and execute memfd files for minijail unit tests.
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userdebug_or_eng(`
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allow shell appdomain_tmpfs:file { open execute_no_trans };
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')
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# Allow shell to write db.log.detailed, db.log.slow_query_threshold*
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set_prop(shell, sqlite_log_prop)
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# Allow shell to write MTE properties even on user builds.
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set_prop(shell, arm64_memtag_prop)
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set_prop(shell, permissive_mte_prop)
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# Allow shell to write kcmdline properties even on user builds.
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set_prop(shell, kcmdline_prop)
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# Allow shell to read the dm-verity props on user builds.
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get_prop(shell, verity_status_prop)
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# Allow shell to read Virtual A/B related properties
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get_prop(shell, virtual_ab_prop)
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# Allow ReadDefaultFstab() for CTS.
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read_fstab(shell)
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# Allow shell read access to /apex/apex-info-list.xml for CTS.
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allow shell apex_info_file:file r_file_perms;
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# Let the shell user call virtualizationservice (and
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# virtualizationservice call back to shell) for debugging.
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virtualizationservice_use(shell)
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# Allow shell to set persist.wm.debug properties
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userdebug_or_eng(`set_prop(shell, persist_wm_debug_prop)')
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# Allow shell to write GWP-ASan properties even on user builds.
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set_prop(shell, gwp_asan_prop)
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# Allow shell to set persist.sysui.notification.builder_extras_override property
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userdebug_or_eng(`set_prop(shell, persist_sysui_builder_extras_prop)')
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# Allow shell to set persist.sysui.notification.ranking_update_ashmem property
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userdebug_or_eng(`set_prop(shell, persist_sysui_ranking_update_prop)')
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# Allow shell to read the build properties for attestation feature
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get_prop(shell, build_attestation_prop)
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# Allow shell to execute oatdump.
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allow shell oatdump_exec:file rx_file_perms;
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# Allow shell access to socket for test
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userdebug_or_eng(`
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allow shell aconfigd_socket:sock_file write;
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allow shell aconfigd:unix_stream_socket connectto;
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')
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# Create and use network sockets.
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net_domain(shell)
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# logcat
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read_logd(shell)
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control_logd(shell)
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get_prop(shell, logd_prop)
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# logcat -L (directly, or via dumpstate)
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allow shell pstorefs:dir search;
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allow shell pstorefs:file r_file_perms;
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# Root fs.
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allow shell rootfs:dir r_dir_perms;
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# read files in /data/anr
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allow shell anr_data_file:dir r_dir_perms;
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allow shell anr_data_file:file r_file_perms;
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# Access /data/local/tmp.
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allow shell shell_data_file:dir create_dir_perms;
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allow shell shell_data_file:file create_file_perms;
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allow shell shell_data_file:file rx_file_perms;
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allow shell shell_data_file:lnk_file create_file_perms;
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# Access /data/local/tests.
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allow shell shell_test_data_file:dir create_dir_perms;
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allow shell shell_test_data_file:file create_file_perms;
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allow shell shell_test_data_file:file rx_file_perms;
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allow shell shell_test_data_file:lnk_file create_file_perms;
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allow shell shell_test_data_file:sock_file create_file_perms;
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# Read and delete from /data/local/traces.
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allow shell trace_data_file:file { r_file_perms unlink };
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allow shell trace_data_file:dir { r_dir_perms remove_name write };
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# Access /data/misc/profman.
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allow shell profman_dump_data_file:dir { write remove_name r_dir_perms };
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allow shell profman_dump_data_file:file { unlink r_file_perms };
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# Read/execute files in /data/nativetest
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userdebug_or_eng(`
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allow shell nativetest_data_file:dir r_dir_perms;
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allow shell nativetest_data_file:file rx_file_perms;
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')
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# adb bugreport
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unix_socket_connect(shell, dumpstate, dumpstate)
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allow shell devpts:chr_file rw_file_perms;
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allow shell tty_device:chr_file rw_file_perms;
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allow shell console_device:chr_file rw_file_perms;
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allow shell input_device:dir r_dir_perms;
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allow shell input_device:chr_file r_file_perms;
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r_dir_file(shell, system_file)
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allow shell system_file:file x_file_perms;
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allow shell toolbox_exec:file rx_file_perms;
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allow shell shell_exec:file rx_file_perms;
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allow shell zygote_exec:file rx_file_perms;
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userdebug_or_eng(`
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# "systrace --boot" support - allow boottrace service to run
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allow shell boottrace_data_file:dir rw_dir_perms;
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allow shell boottrace_data_file:file create_file_perms;
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')
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# allow shell access to services
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allow shell servicemanager:service_manager list;
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# don't allow shell to access GateKeeper service
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# TODO: why is this so broad? Tightening candidate? It needs at list:
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# - dumpstate_service (so it can receive dumpstate progress updates)
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allow shell {
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service_manager_type
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-apex_service
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-dnsresolver_service
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-gatekeeper_service
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-hal_keymint_service
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-hal_secureclock_service
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-hal_sharedsecret_service
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-incident_service
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-installd_service
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-mdns_service
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-netd_service
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-system_suspend_control_internal_service
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-system_suspend_control_service
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-virtual_touchpad_service
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-vold_service
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-default_android_service
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}:service_manager find;
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allow shell dumpstate:binder call;
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# allow shell to get information from hwservicemanager
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# for instance, listing hardware services with lshal
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hwbinder_use(shell)
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allow shell hwservicemanager:hwservice_manager list;
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# allow shell to look through /proc/ for lsmod, ps, top, netstat, vmstat.
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r_dir_file(shell, proc_net_type)
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allow shell {
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proc_asound
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proc_cgroups
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proc_filesystems
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proc_interrupts
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proc_loadavg # b/124024827
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proc_meminfo
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proc_modules
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proc_pid_max
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proc_slabinfo
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proc_stat
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proc_timer
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proc_uptime
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proc_version
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proc_vmstat
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proc_zoneinfo
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}:file r_file_perms;
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# allow listing network interfaces under /sys/class/net.
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allow shell sysfs_net:dir r_dir_perms;
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r_dir_file(shell, cgroup)
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allow shell cgroup_desc_file:file r_file_perms;
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allow shell cgroup_desc_api_file:file r_file_perms;
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allow shell vendor_cgroup_desc_file:file r_file_perms;
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r_dir_file(shell, cgroup_v2)
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allow shell domain:dir { search open read getattr };
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allow shell domain:{ file lnk_file } { open read getattr };
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# statvfs() of /proc and other labeled filesystems
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# (yaffs2, jffs2, ext2, ext3, ext4, xfs, btrfs, f2fs, squashfs, overlay)
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allow shell { proc labeledfs }:filesystem getattr;
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# stat() of /dev
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allow shell device:dir getattr;
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# allow shell to read /proc/pid/attr/current for ps -Z
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allow shell domain:process getattr;
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# Allow pulling the SELinux policy for CTS purposes
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allow shell selinuxfs:dir r_dir_perms;
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allow shell selinuxfs:file r_file_perms;
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# enable shell domain to read/write files/dirs for bootchart data
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# User will creates the start and stop file via adb shell
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# and read other files created by init process under /data/bootchart
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allow shell bootchart_data_file:dir rw_dir_perms;
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allow shell bootchart_data_file:file create_file_perms;
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# Make sure strace works for the non-privileged shell user
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allow shell self:process ptrace;
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# allow shell to get battery info
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allow shell sysfs:dir r_dir_perms;
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allow shell sysfs_batteryinfo:dir r_dir_perms;
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allow shell sysfs_batteryinfo:file r_file_perms;
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# Allow reads (but not writes) of the MGLRU state
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allow shell sysfs_lru_gen_enabled:file r_file_perms;
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# Allow access to ion memory allocation device.
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allow shell ion_device:chr_file rw_file_perms;
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#
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# filesystem test for insecure chr_file's is done
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# via a host side test
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#
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allow shell dev_type:dir r_dir_perms;
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allow shell dev_type:chr_file getattr;
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# /dev/fd is a symlink
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allow shell proc:lnk_file getattr;
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#
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# filesystem test for insucre blk_file's is done
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# via hostside test
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#
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allow shell dev_type:blk_file getattr;
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# read selinux policy files
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allow shell file_contexts_file:file r_file_perms;
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allow shell property_contexts_file:file r_file_perms;
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allow shell seapp_contexts_file:file r_file_perms;
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allow shell service_contexts_file:file r_file_perms;
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allow shell sepolicy_file:file r_file_perms;
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# Allow shell to start up vendor shell
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allow shell vendor_shell_exec:file rx_file_perms;
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# Everything is labeled as rootfs in recovery mode. Allow shell to
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# execute them.
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recovery_only(`
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allow shell rootfs:file rx_file_perms;
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')
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###
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### Neverallow rules
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###
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# Do not allow shell to talk directly to security HAL services other than
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# hal_remotelyprovisionedcomponent_service
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neverallow shell {
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hal_keymint_service
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hal_secureclock_service
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hal_sharedsecret_service
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}:service_manager find;
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# Do not allow shell to hard link to any files.
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# In particular, if shell hard links to app data
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# files, installd will not be able to guarantee the deletion
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# of the linked to file. Hard links also contribute to security
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# bugs, so we want to ensure the shell user never has this
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# capability.
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neverallow shell file_type:file link;
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# Do not allow privileged socket ioctl commands
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neverallowxperm shell domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
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# limit shell access to sensitive char drivers to
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|
# only getattr required for host side test.
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|
neverallow shell {
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|
fuse_device
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|
hw_random_device
|
|
port_device
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|
}:chr_file ~getattr;
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|
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# Limit shell to only getattr on blk devices for host side tests.
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|
neverallow shell dev_type:blk_file ~getattr;
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|
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|
# b/30861057: Shell access to existing input devices is an abuse
|
|
# vector. The shell user can inject events that look like they
|
|
# originate from the touchscreen etc.
|
|
# Everyone should have already moved to UiAutomation#injectInputEvent
|
|
# if they are running instrumentation tests (i.e. CTS), Monkey for
|
|
# their stress tests, and the input command (adb shell input ...) for
|
|
# injecting swipes and things.
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|
neverallow shell input_device:chr_file no_w_file_perms;
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|
|
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neverallow shell self:perf_event ~{ open read write kernel };
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|
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# Never allow others to set or get the perf.drop_caches property.
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|
neverallow { domain -shell -init } perf_drop_caches_prop:property_service set;
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neverallow { domain -shell -init -dumpstate } perf_drop_caches_prop:file read;
|