29fc85eeab
There's a selinux denial for update_engine after go/aog/530462; the
denial is likely due to the setgid bit of the
update_engine_log_data_file.
Message:
11-11 02:07:54.843 870 870 I auditd : type=1400 audit(0.0:4): avc:
denied { fsetid } for comm="update_engine" capability=4
scontext=u:r:update_engine:s0 tcontext=u:r:update_engine:s0
tclass=capability permissive=0
11-11 02:07:54.843 870 870 I auditd : type=1400 audit(0.0:5): avc:
denied { fsetid } for comm="update_engine" capability=4
scontext=u:r:update_engine:s0 tcontext=u:r:update_engine:s0
tclass=capability permissive=0
11-11 02:07:54.843 870 870 I auditd : type=1400 audit(0.0:4): avc:
denied { fsetid } for comm="update_engine" capability=4
scontext=u:r:update_engine:s0 tcontext=u:r:update_engine:s0
tclass=capability permissive=0
11-11 02:07:54.843 870 870 I auditd : type=1400 audit(0.0:5): avc:
denied { fsetid } for comm="update_engine" capability=4
scontext=u:r:update_engine:s0 tcontext=u:r:update_engine:s0
tclass=capability permissive=0
Bug: 69197466
Test: denial message gone on sailfish.
Change-Id: I0fdc285e4a4faa8dc37b4907484b3c79d4cc49cf
57 lines
2.1 KiB
Text
57 lines
2.1 KiB
Text
# Domain for update_engine daemon.
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type update_engine, domain, update_engine_common;
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type update_engine_exec, exec_type, file_type;
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net_domain(update_engine);
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# Read/[write] to /proc/net/xt_qtaguid/ctrl and /dev/xt_qtaguid to tag network
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# sockets.
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allow update_engine qtaguid_proc:file rw_file_perms;
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allow update_engine qtaguid_device:chr_file r_file_perms;
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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:capability { 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:capability fsetid;
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allow update_engine kmsg_device:chr_file 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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# 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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# Don't allow kernel module loading, just silence the logs.
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dontaudit update_engine kernel:system module_request;
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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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# Allow update_engine to call the callback function provided by priv_app.
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binder_call(update_engine, priv_app)
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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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