2de02877a3
Android's native bridge functionality allows an Android native
app written on one CPU architecture to run on a different architecture.
For example, Android ARM apps may run on an x86 CPU.
To support this, the native bridge functionality needs to replace
/proc/cpuinfo with the version from /system/lib/<ISA>/cpuinfo
using a bind mount. See commit ab0da5a9a6860046619629b8e6b83692d35dff86
in system/core.
This change:
1) Creates a new label proc_cpuinfo, and assigns /proc/cpuinfo
that label.
2) Grants read-only access to all SELinux domains, to avoid
breaking pre-existing apps.
3) Grants zygote mounton capabilities for that file, so zygote
can replace the file as necessary.
Addresses the following denial:
avc: denied { mounton } for path="/proc/cpuinfo" dev="proc" ino=4026532012 scontext=u:r:zygote:s0 tcontext=u:object_r:proc:s0 tclass=file
Bug: 17671501
Change-Id: Ib70624fba2baeccafbc0a41369833f76b976ee20
171 lines
6.6 KiB
Text
171 lines
6.6 KiB
Text
# Filesystem types
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type labeledfs, fs_type;
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type pipefs, fs_type;
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type sockfs, fs_type;
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type rootfs, fs_type;
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type proc, fs_type;
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# Security-sensitive proc nodes that should not be writable to most.
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type proc_security, fs_type;
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# proc, sysfs, or other nodes that permit configuration of kernel usermodehelpers.
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type usermodehelper, fs_type, sysfs_type;
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type qtaguid_proc, fs_type, mlstrustedobject;
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type proc_bluetooth_writable, fs_type;
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type proc_cpuinfo, fs_type;
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type proc_net, fs_type;
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type proc_sysrq, fs_type;
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type selinuxfs, fs_type, mlstrustedobject;
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type cgroup, fs_type, mlstrustedobject;
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type sysfs, fs_type, sysfs_type, mlstrustedobject;
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type sysfs_writable, fs_type, sysfs_type, mlstrustedobject;
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type sysfs_bluetooth_writable, fs_type, sysfs_type, mlstrustedobject;
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type sysfs_nfc_power_writable, fs_type, sysfs_type, mlstrustedobject;
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type sysfs_wake_lock, fs_type, sysfs_type;
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# /sys/devices/system/cpu
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type sysfs_devices_system_cpu, fs_type, sysfs_type;
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# /sys/module/lowmemorykiller
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type sysfs_lowmemorykiller, fs_type, sysfs_type;
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type inotify, fs_type, mlstrustedobject;
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type devpts, fs_type, mlstrustedobject;
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type tmpfs, fs_type;
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type shm, fs_type;
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type mqueue, fs_type;
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type fuse, sdcard_type, fs_type, mlstrustedobject;
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type vfat, sdcard_type, fs_type, mlstrustedobject;
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typealias fuse alias sdcard_internal;
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typealias vfat alias sdcard_external;
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type debugfs, fs_type, mlstrustedobject;
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type pstorefs, fs_type;
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type functionfs, fs_type;
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type oemfs, fs_type, contextmount_type;
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type usbfs, fs_type;
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# File types
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type unlabeled, file_type;
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# Default type for anything under /system.
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type system_file, file_type;
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# Default type for anything under /data.
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type system_data_file, file_type, data_file_type;
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# /data/.layout_version or other installd-created files that
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# are created in a system_data_file directory.
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type install_data_file, file_type, data_file_type;
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# /data/drm - DRM plugin data
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type drm_data_file, file_type, data_file_type;
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# /data/anr - ANR traces
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type anr_data_file, file_type, data_file_type, mlstrustedobject;
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# /data/tombstones - core dumps
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type tombstone_data_file, file_type, data_file_type;
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# /data/app - user-installed apps
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type apk_data_file, file_type, data_file_type;
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type apk_tmp_file, file_type, data_file_type, mlstrustedobject;
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# /data/app-private - forward-locked apps
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type apk_private_data_file, file_type, data_file_type;
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type apk_private_tmp_file, file_type, data_file_type, mlstrustedobject;
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# /data/dalvik-cache
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type dalvikcache_data_file, file_type, data_file_type;
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# /data/dalvik-cache/profiles
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type dalvikcache_profiles_data_file, file_type, data_file_type, mlstrustedobject;
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# /data/resource-cache
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type resourcecache_data_file, file_type, data_file_type;
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# /data/local - writable by shell
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type shell_data_file, file_type, data_file_type, mlstrustedobject;
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# /data/gps
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type gps_data_file, file_type, data_file_type;
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# /data/property
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type property_data_file, file_type, data_file_type;
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# /data/misc subdirectories
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type adb_keys_file, file_type, data_file_type;
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type audio_data_file, file_type, data_file_type;
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type bluetooth_data_file, file_type, data_file_type;
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type camera_data_file, file_type, data_file_type;
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type keystore_data_file, file_type, data_file_type;
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type media_data_file, file_type, data_file_type;
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type media_rw_data_file, file_type, data_file_type, mlstrustedobject;
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type net_data_file, file_type, data_file_type;
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type nfc_data_file, file_type, data_file_type;
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type radio_data_file, file_type, data_file_type, mlstrustedobject;
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type shared_relro_file, file_type, data_file_type;
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type systemkeys_data_file, file_type, data_file_type;
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type vpn_data_file, file_type, data_file_type;
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type wifi_data_file, file_type, data_file_type;
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type zoneinfo_data_file, file_type, data_file_type;
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# Compatibility with type names used in vanilla Android 4.3 and 4.4.
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typealias audio_data_file alias audio_firmware_file;
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# /data/data subdirectories - app sandboxes
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type app_data_file, file_type, data_file_type;
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# /data/data subdirectory for system UID apps.
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type system_app_data_file, file_type, data_file_type;
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# Compatibility with type name used in Android 4.3 and 4.4.
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typealias app_data_file alias platform_app_data_file;
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typealias app_data_file alias download_file;
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# Default type for anything under /cache
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type cache_file, file_type, mlstrustedobject;
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# Type for /cache/.*\.{data|restore} and default
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# type for anything under /cache/backup
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type cache_backup_file, file_type, mlstrustedobject;
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# Default type for anything under /efs
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type efs_file, file_type;
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# Type for wallpaper file.
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type wallpaper_file, file_type, mlstrustedobject;
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# /mnt/asec
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type asec_apk_file, file_type, data_file_type;
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# Elements of asec files (/mnt/asec) that are world readable
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type asec_public_file, file_type, data_file_type;
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# /data/app-asec
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type asec_image_file, file_type, data_file_type;
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# /data/backup and /data/secure/backup
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type backup_data_file, file_type, data_file_type, mlstrustedobject;
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# For /data/security
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type security_file, file_type;
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# All devices have bluetooth efs files. But they
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# vary per device, so this type is used in per
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# device policy
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type bluetooth_efs_file, file_type;
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# Socket types
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type adbd_socket, file_type;
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type bluetooth_socket, file_type;
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type dnsproxyd_socket, file_type, mlstrustedobject;
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type dumpstate_socket, file_type;
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type fwmarkd_socket, file_type, mlstrustedobject;
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type gps_socket, file_type;
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type installd_socket, file_type;
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type lmkd_socket, file_type;
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type logd_debug, file_type, mlstrustedobject;
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type logd_socket, file_type, mlstrustedobject;
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type logdr_socket, file_type, mlstrustedobject;
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type logdw_socket, file_type, mlstrustedobject;
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type mdns_socket, file_type;
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type mdnsd_socket, file_type, mlstrustedobject;
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type mtpd_socket, file_type;
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type netd_socket, file_type;
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type property_socket, file_type;
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type racoon_socket, file_type;
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type rild_socket, file_type;
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type rild_debug_socket, file_type;
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type system_wpa_socket, file_type;
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type system_ndebug_socket, file_type;
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type vold_socket, file_type;
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type wpa_socket, file_type;
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type zygote_socket, file_type;
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# UART (for GPS) control proc file
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type gps_control, file_type;
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# Allow files to be created in their appropriate filesystems.
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allow fs_type self:filesystem associate;
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allow sysfs_type sysfs:filesystem associate;
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allow file_type labeledfs:filesystem associate;
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allow file_type tmpfs:filesystem associate;
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allow file_type rootfs:filesystem associate;
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allow dev_type tmpfs:filesystem associate;
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# It's a bug to assign the file_type attribute and fs_type attribute
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# to any type. Do not allow it.
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#
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# For example, the following is a bug:
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# type apk_data_file, file_type, data_file_type, fs_type;
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# Should be:
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# type apk_data_file, file_type, data_file_type;
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neverallow fs_type file_type:filesystem associate;
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