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
25 lines
1017 B
Plaintext
25 lines
1017 B
Plaintext
# Any toolbox command run by init.
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# At present, the only known usage is for running mkswap via fs_mgr.
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# Do NOT use this domain for toolbox when run by any other domain.
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type toolbox, domain;
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type toolbox_exec, system_file_type, exec_type, file_type;
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# /dev/__null__ created by init prior to policy load,
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# open fd inherited by fsck.
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allow toolbox tmpfs:chr_file { read write ioctl };
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# Inherit and use pty created by android_fork_execvp_ext().
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allow toolbox devpts:chr_file { read write getattr ioctl };
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# mkswap-specific.
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# Read/write block devices used for swap partitions.
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# Assign swap_block_device type any such partition in your
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# device/<vendor>/<product>/sepolicy/file_contexts file.
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allow toolbox block_device:dir search;
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allow toolbox swap_block_device:blk_file rw_file_perms;
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# Only allow entry from init via the toolbox binary.
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neverallow { domain -init } toolbox:process transition;
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neverallow * toolbox:process dyntransition;
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neverallow toolbox { file_type fs_type -toolbox_exec}:file entrypoint;
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