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
43 lines
1.4 KiB
Text
43 lines
1.4 KiB
Text
type sdcardd, domain;
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type sdcardd_exec, system_file_type, exec_type, file_type;
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allow sdcardd cgroup:dir create_dir_perms;
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allow sdcardd fuse_device:chr_file rw_file_perms;
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allow sdcardd rootfs:dir mounton; # TODO: deprecated in M
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allow sdcardd sdcardfs:filesystem remount;
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allow sdcardd tmpfs:dir r_dir_perms;
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allow sdcardd mnt_media_rw_file:dir r_dir_perms;
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allow sdcardd storage_file:dir search;
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allow sdcardd storage_stub_file:dir { search mounton };
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allow sdcardd sdcard_type:filesystem { mount unmount };
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allow sdcardd self:global_capability_class_set { setuid setgid dac_override dac_read_search sys_admin sys_resource };
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allow sdcardd sdcard_type:dir create_dir_perms;
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allow sdcardd sdcard_type:file create_file_perms;
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allow sdcardd media_rw_data_file:dir create_dir_perms;
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allow sdcardd media_rw_data_file:file create_file_perms;
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# Read /data/system/packages.list.
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allow sdcardd system_data_file:file r_file_perms;
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# Read /data/.layout_version
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allow sdcardd install_data_file:file r_file_perms;
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# Allow stdin/out back to vold
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allow sdcardd vold:fd use;
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allow sdcardd vold:fifo_file { read write getattr };
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# Allow running on top of expanded storage
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allow sdcardd mnt_expand_file:dir search;
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# access /proc/filesystems
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allow sdcardd proc_filesystems:file r_file_perms;
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###
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### neverallow rules
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###
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# The sdcard daemon should no longer be started from init
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neverallow init sdcardd_exec:file execute;
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neverallow init sdcardd:process { transition dyntransition };
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