5e37271df8
system_file_type is a new attribute used to identify files which exist on the /system partition. It's useful for allow rules in init, which are based off of a blacklist of writable files. Additionally, it's useful for constructing neverallow rules to prevent regressions. Additionally, add commented out tests which enforce that all files on the /system partition have the system_file_type attribute. These tests will be uncommented in a future change after all the device-specific policies are cleaned up. Test: Device boots and no obvious problems. Change-Id: Id9bae6625f042594c8eba74ca712abb09702c1e5
42 lines
1.5 KiB
Text
42 lines
1.5 KiB
Text
type runas, domain, mlstrustedsubject;
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type runas_exec, system_file_type, exec_type, file_type;
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allow runas adbd:fd use;
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allow runas adbd:process sigchld;
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allow runas adbd:unix_stream_socket { read write };
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allow runas shell:fd use;
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allow runas shell:fifo_file { read write };
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allow runas shell:unix_stream_socket { read write };
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allow runas devpts:chr_file { read write ioctl };
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allow runas shell_data_file:file { read write };
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# run-as reads package information.
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allow runas system_data_file:file r_file_perms;
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allow runas system_data_file:lnk_file getattr;
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# The app's data dir may be accessed through a symlink.
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allow runas system_data_file:lnk_file read;
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# run-as checks and changes to the app data dir.
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dontaudit runas self:global_capability_class_set { dac_override dac_read_search };
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allow runas app_data_file:dir { getattr search };
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# run-as switches to the app UID/GID.
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allow runas self:global_capability_class_set { setuid setgid };
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# run-as switches to the app security context.
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selinux_check_context(runas) # validate context
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allow runas self:process setcurrent;
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allow runas non_system_app_set:process dyntransition; # setcon
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# runas/libselinux needs access to seapp_contexts_file to
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# determine which domain to transition to.
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allow runas seapp_contexts_file:file r_file_perms;
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###
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### neverallow rules
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###
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# run-as cannot have capabilities other than CAP_SETUID and CAP_SETGID
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neverallow runas self:global_capability_class_set ~{ setuid setgid };
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neverallow runas self:global_capability2_class_set *;
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