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
45 lines
1.3 KiB
Text
45 lines
1.3 KiB
Text
# uncrypt
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type uncrypt, domain, mlstrustedsubject;
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type uncrypt_exec, exec_type, file_type;
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allow uncrypt self:global_capability_class_set dac_override;
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# Read OTA zip file from /data/data/com.google.android.gsf/app_download
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r_dir_file(uncrypt, app_data_file)
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userdebug_or_eng(`
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# For debugging, allow /data/local/tmp access
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r_dir_file(uncrypt, shell_data_file)
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')
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# Read /cache/recovery/command
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# Read /cache/recovery/uncrypt_file
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allow uncrypt cache_file:dir search;
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allow uncrypt cache_recovery_file:dir rw_dir_perms;
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allow uncrypt cache_recovery_file:file create_file_perms;
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# Read OTA zip file at /data/ota_package/.
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allow uncrypt ota_package_file:dir r_dir_perms;
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allow uncrypt ota_package_file:file r_file_perms;
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# Write to /dev/socket/uncrypt
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unix_socket_connect(uncrypt, uncrypt, uncrypt)
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# Set a property to reboot the device.
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set_prop(uncrypt, powerctl_prop)
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# Raw writes to block device
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allow uncrypt self:global_capability_class_set sys_rawio;
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allow uncrypt misc_block_device:blk_file w_file_perms;
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allow uncrypt block_device:dir r_dir_perms;
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# Access userdata block device.
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allow uncrypt userdata_block_device:blk_file w_file_perms;
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r_dir_file(uncrypt, rootfs)
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# uncrypt reads /proc/cmdline
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allow uncrypt proc_cmdline:file r_file_perms;
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# Read files in /sys
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r_dir_file(uncrypt, sysfs_dt_firmware_android)
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