9ec532752d
Any FUSE filesystem will receive the 'fuse' type when mounted. It is possible to change this behaviour by specifying the "context=" or "fscontext=" option in mount(). Because 'fuse' has historically been used only for the emulated storage, it also received the 'sdcard_type' attribute. Replace the 'sdcard_type' attribute from 'fuse' with the new 'fusefs_type'. This attribute can be attached on derived types (such as app_fusefs). This change: - Remove the neverallow restriction on this new type. This means any custom FUSE implementation can be mounted/unmounted (if the correct allow rule is added). See domain.te. - Change the attribute of 'fuse' from 'sdcard_type' to 'fusefs_type'. See file.te. - Modify all references to 'sdcard_type' to explicitly include 'fuse' for compatibility reason. Bug: 177481425 Bug: 190804537 Test: Build and boot aosp_cf_x86_64_phone-userdebug Change-Id: Id4e410a049f72647accd4c3cf43eaa55e94c318f
46 lines
1.6 KiB
Text
46 lines
1.6 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 cgroup_v2: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 fuse }: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 fuse }:dir create_dir_perms;
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allow sdcardd { sdcard_type fuse }: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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allow sdcardd packages_list_file:file r_file_perms;
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# Read /data/misc/installd/layout_version
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allow sdcardd install_data_file:file r_file_perms;
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allow sdcardd install_data_file:dir search;
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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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