9b2e0cbeea
In kernel 4.7, the capability and capability2 classes were split apart
from cap_userns and cap2_userns (see kernel commit
8e4ff6f228e4722cac74db716e308d1da33d744f). Since then, Android cannot be
run in a container with SELinux in enforcing mode.
This change applies the existing capability rules to user namespaces as
well as the root namespace so that Android running in a container
behaves the same on pre- and post-4.7 kernels.
This is essentially:
1. New global_capability_class_set and global_capability2_class_set
that match capability+cap_userns and capability2+cap2_userns,
respectively.
2. s/self:capability/self:global_capability_class_set/g
3. s/self:capability2/self:global_capability2_class_set/g
4. Add cap_userns and cap2_userns to the existing capability_class_set
so that it covers all capabilities. This set was used by several
neverallow and dontaudit rules, and I confirmed that the new
classes are still appropriate.
Test: diff new policy against old and confirm that all new rules add
only cap_userns or cap2_userns;
Boot ARC++ on a device with the 4.12 kernel.
Bug: crbug.com/754831
Change-Id: I4007eb3a2ecd01b062c4c78d9afee71c530df95f
43 lines
1.4 KiB
Text
43 lines
1.4 KiB
Text
type sdcardd, domain;
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type sdcardd_exec, 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 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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