bb9a388840
system/core commit 331cf2fb7c16b5b25064f8d2f00284105a9b413f created a number of new properties of the form: [ro.boottime.init]: [5294587604] [ro.boottime.InputEventFind]: [10278767840] [ro.boottime.adbd]: [8359267180] ... These properties were assigned the default_prop SELinux label because a better label did not exist. Properties labeled with the default_prop label are readable to any SELinux domain, which is overly broad. bullhead:/ $ getprop -Z ro.boottime.adbd u:object_r:default_prop:s0 Instead, create a new label for the ro.boottime.* properties so we can apply more fine grain read access control to these properties. bullhead:/ $ getprop -Z ro.boottime.adbd u:object_r:boottime_prop:s0 New SELinux property labels have minimal permissions by default. As a result, after this change, ro.boottime.* properties will only be readable to system_server, bootstat, init (because it manages the property space), and "adb root" (because no SELinux permissions are enforced there). Additional read access can be granted as-needed. This is part of a larger effort to implement fine-grain access control on the properties managed by init. Test: Device boots and no SELinux denials on boot. Change-Id: Ibf981cb81898f4356fdc5c1b6f15dd93c0d6d84d
14 lines
412 B
Plaintext
14 lines
412 B
Plaintext
# bootstat command
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type bootstat, domain;
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type bootstat_exec, exec_type, file_type;
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# Allow persistent storage in /data/misc/bootstat.
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allow bootstat bootstat_data_file:dir rw_dir_perms;
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allow bootstat bootstat_data_file:file create_file_perms;
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# Read access to pseudo filesystems (for /proc/uptime).
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r_dir_file(bootstat, proc)
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# Collect metrics on boot time created by init
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get_prop(bootstat, boottime_prop)
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