platform_system_sepolicy/private/mtectrl.te

# mtectrl is a tool to request MTE (Memory Tagging Extensions) from the bootloader.
type mtectrl, domain, coredomain;
type mtectrl_exec, system_file_type, exec_type, file_type;

init_daemon_domain(mtectrl)

# to set the sys prop to match the bootloader message state.
set_prop(mtectrl, arm64_memtag_prop)

# mtectrl communicates the request to the bootloader via the misc partition.
# needs to write to update the request in misc partition, and read to sync
# back to the property.
allow mtectrl misc_block_device:blk_file rw_file_perms;
allow mtectrl block_device:dir r_dir_perms;
read_fstab(mtectrl)

# bootloader_message tries to find the fstab in the device config path first,
# but because we've already booted up we can use the ro.boot properties instead,
# so we can just ignore the SELinux denial.
dontaudit mtectrl sysfs_dt_firmware_android:dir search;
dontaudit mtectrl vendor_property_type:file read;