75806ef3c5
Ideally, public should only contain APIs (types / attributes) for
vendor. The other statements like allow/neverallow/typeattributes are
regarded as implementation detail for platform and should be in private.
Bug: 232023812
Test: m selinux_policy
Test: diff <(git diff --staged | grep "^-" | cut -b2- | sort) \
<(git diff --staged | grep "^+" | cut -b2- | sort)
Test: remove comments on plat_sepolicy.cil, replace base_typeattr_*
to base_typeattr and then compare old and new plat_sepolicy.cil
Change-Id: I5e7d2da4465ab0216de6bacdf03077d37f6ffe12
117 lines
4.3 KiB
Text
117 lines
4.3 KiB
Text
typeattribute update_engine coredomain;
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init_daemon_domain(update_engine);
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# Allow to talk to gsid.
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allow update_engine gsi_service:service_manager find;
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binder_call(update_engine, gsid)
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# Allow to start gsid service.
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set_prop(update_engine, ctl_gsid_prop)
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# Allow to start snapuserd for dm-user communication.
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set_prop(update_engine, ctl_snapuserd_prop)
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# Allow to set the OTA related properties, e.g. ota.warm_reset.
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set_prop(update_engine, ota_prop)
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get_prop(update_engine, ota_build_prop)
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# Allow to get the DSU status
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get_prop(update_engine, gsid_prop)
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# Allow update_engine to call the callback function provided by GKI update hook.
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binder_call(update_engine, gki_apex_prepostinstall)
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# Allow update_engine to call the callback function by settings app
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# for the kernel update triggered using 16k developer option
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binder_call(update_engine, system_app)
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# Allow to communicate with the snapuserd service, for dm-user snapshots.
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allow update_engine snapuserd:unix_stream_socket connectto;
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allow update_engine snapuserd_socket:sock_file write;
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get_prop(update_engine, snapuserd_prop)
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# Allow to communicate with apexd for calculating and reserving space for
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# capex decompression
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allow update_engine apex_service:service_manager find;
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binder_call(update_engine, apexd)
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# let this domain use the hal service
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binder_use(update_engine)
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hal_client_domain(update_engine, hal_bootctl)
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net_domain(update_engine);
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# Following permissions are needed for update_engine.
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allow update_engine self:process { setsched };
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allow update_engine self:global_capability_class_set { fowner sys_admin };
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# Note: fsetid checks are triggered when creating a file in a directory with
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# the setgid bit set to determine if the file should inherit setgid. In this
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# case, setgid on the file is undesirable so we should just suppress the
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# denial.
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dontaudit update_engine self:global_capability_class_set fsetid;
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allow update_engine kmsg_device:chr_file { getattr w_file_perms };
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allow update_engine update_engine_exec:file rx_file_perms;
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wakelock_use(update_engine);
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# Ignore these denials.
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dontaudit update_engine kernel:process setsched;
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dontaudit update_engine self:global_capability_class_set sys_rawio;
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# Allow using persistent storage in /data/misc/update_engine.
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allow update_engine update_engine_data_file:dir create_dir_perms;
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allow update_engine update_engine_data_file:file create_file_perms;
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# Allow using persistent storage in /data/misc/update_engine_log.
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allow update_engine update_engine_log_data_file:dir create_dir_perms;
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allow update_engine update_engine_log_data_file:file create_file_perms;
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# Register the service to perform Binder IPC.
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binder_use(update_engine)
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add_service(update_engine, update_engine_service)
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add_service(update_engine, update_engine_stable_service)
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# Allow update_engine to call the callback function provided by priv_app/GMS core.
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binder_call(update_engine, priv_app)
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# b/142672293: No other priv-app should need this rule now that GMS core runs in its own domain.
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userdebug_or_eng(`
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auditallow update_engine priv_app:binder { call transfer };
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auditallow priv_app update_engine:binder transfer;
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auditallow update_engine priv_app:fd use;
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')
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binder_call(update_engine, gmscore_app)
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# Allow update_engine to call the callback function provided by system_server.
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binder_call(update_engine, system_server)
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# Read OTA zip file at /data/ota_package/.
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allow update_engine ota_package_file:file r_file_perms;
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allow update_engine ota_package_file:dir r_dir_perms;
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# Use Boot Control HAL
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hal_client_domain(update_engine, hal_bootctl)
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# access /proc/misc
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allow update_engine proc_misc:file r_file_perms;
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# read directories on /system and /vendor
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allow update_engine system_file:dir r_dir_perms;
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# Allow ReadDefaultFstab().
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# update_engine tries to determine the parent path for all devices (e.g.
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# /dev/block/by-name) by reading the default fstab and looking for the misc
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# device.
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read_fstab(update_engine)
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# Allow to write to snapshotctl_log logs.
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# TODO(b/148818798) revert when parent bug is fixed.
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userdebug_or_eng(`
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allow update_engine snapshotctl_log_data_file:dir rw_dir_perms;
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allow update_engine snapshotctl_log_data_file:file create_file_perms;
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')
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# Allow determining filesystems available on system.
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# Needed for checking if overlayfs is enabled
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allow update_engine proc_filesystems:file r_file_perms;
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