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Jeff Sharkey authored
Now that we're treating storage as a runtime permission, we need to grant read/write access without killing the app. This is really tricky, since we had been using GIDs for access control, and they're set in stone once Zygote drops privileges. The only thing left that can change dynamically is the filesystem itself, so let's do that. This means changing the FUSE daemon to present itself as three different views: /mnt/runtime_default/foo - view for apps with no access /mnt/runtime_read/foo - view for apps with read access /mnt/runtime_write/foo - view for apps with write access There is still a single location for all the backing files, and filesystem permissions are derived the same way for each view, but the file modes are masked off differently for each mountpoint. During Zygote fork, it wires up the appropriate storage access into an isolated mount namespace based on the current app permissions. When the app is granted permissions dynamically at runtime, the system asks vold to jump into the existing mount namespace and bind mount the newly granted access model into place. avc: denied { sys_chroot } for capability=18 scontext=u:r:vold:s0 tcontext=u:r:vold:s0 tclass=capability permissive=1 avc: denied { mounton } for path="/storage" dev="tmpfs" ino=4155 scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir permissive=1 avc: denied { unmount } for scontext=u:r:zygote:s0 tcontext=u:object_r:tmpfs:s0 tclass=filesystem permissive=0 Bug: 21858077 Change-Id: Ie481d190c5e7a774fbf80fee6e39a980f382967e6b75d099
file_contexts 13.69 KiB
###########################################
# Root
/ u:object_r:rootfs:s0
# Data files
/adb_keys u:object_r:adb_keys_file:s0
/default\.prop u:object_r:rootfs:s0
/fstab\..* u:object_r:rootfs:s0
/init\..* u:object_r:rootfs:s0
/res(/.*)? u:object_r:rootfs:s0
/ueventd\..* u:object_r:rootfs:s0
# Executables
/charger u:object_r:rootfs:s0
/init u:object_r:init_exec:s0
/sbin(/.*)? u:object_r:rootfs:s0
# Empty directories
/lost\+found u:object_r:rootfs:s0
/proc u:object_r:rootfs:s0
# SELinux policy files
/file_contexts u:object_r:rootfs:s0
/property_contexts u:object_r:rootfs:s0
/seapp_contexts u:object_r:rootfs:s0
/sepolicy u:object_r:rootfs:s0
##########################
# Devices
#
/dev(/.*)? u:object_r:device:s0
/dev/akm8973.* u:object_r:sensors_device:s0
/dev/accelerometer u:object_r:sensors_device:s0
/dev/adf[0-9]* u:object_r:graphics_device:s0
/dev/adf-interface[0-9]*\.[0-9]* u:object_r:graphics_device:s0
/dev/adf-overlay-engine[0-9]*\.[0-9]* u:object_r:graphics_device:s0
/dev/alarm u:object_r:alarm_device:s0
/dev/android_adb.* u:object_r:adb_device:s0
/dev/ashmem u:object_r:ashmem_device:s0
/dev/audio.* u:object_r:audio_device:s0
/dev/binder u:object_r:binder_device:s0
/dev/block(/.*)? u:object_r:block_device:s0
/dev/block/dm-[0-9]+ u:object_r:dm_device:s0
/dev/block/loop[0-9]* u:object_r:loop_device:s0
/dev/block/vold/.+ u:object_r:vold_device:s0
/dev/block/ram[0-9]* u:object_r:ram_device:s0
/dev/bus/usb(.*)? u:object_r:usb_device:s0
/dev/cam u:object_r:camera_device:s0
/dev/console u:object_r:console_device:s0
/dev/cpuctl(/.*)? u:object_r:cpuctl_device:s0
/dev/device-mapper u:object_r:dm_device:s0
/dev/eac u:object_r:audio_device:s0
/dev/fscklogs(/.*)? u:object_r:fscklogs:s0
/dev/full u:object_r:full_device:s0
/dev/fuse u:object_r:fuse_device:s0
/dev/graphics(/.*)? u:object_r:graphics_device:s0
/dev/hw_random u:object_r:hw_random_device:s0
/dev/input(/.*) u:object_r:input_device:s0
/dev/iio:device[0-9]+ u:object_r:iio_device:s0
/dev/ion u:object_r:ion_device:s0
/dev/kmem u:object_r:kmem_device:s0
/dev/log(/.*)? u:object_r:log_device:s0
/dev/mem u:object_r:kmem_device:s0
/dev/modem.* u:object_r:radio_device:s0
/dev/mpu u:object_r:gps_device:s0
/dev/mpuirq u:object_r:gps_device:s0
/dev/mtd(/.*)? u:object_r:mtd_device:s0
/dev/mtp_usb u:object_r:mtp_device:s0
/dev/pmsg0 u:object_r:pmsg_device:s0
/dev/pn544 u:object_r:nfc_device:s0/dev/ppp u:object_r:ppp_device:s0
/dev/ptmx u:object_r:ptmx_device:s0
/dev/pvrsrvkm u:object_r:gpu_device:s0
/dev/kmsg u:object_r:kmsg_device:s0
/dev/null u:object_r:null_device:s0
/dev/nvhdcp1 u:object_r:video_device:s0
/dev/random u:object_r:random_device:s0
/dev/rpmsg-omx[0-9] u:object_r:rpmsg_device:s0
/dev/rproc_user u:object_r:rpmsg_device:s0
/dev/rtc[0-9] u:object_r:rtc_device:s0
/dev/snd(/.*)? u:object_r:audio_device:s0
/dev/socket(/.*)? u:object_r:socket_device:s0
/dev/socket/adbd u:object_r:adbd_socket:s0
/dev/socket/sap_uim_socket[0-9] u:object_r:sap_uim_socket:s0
/dev/socket/cryptd u:object_r:vold_socket:s0
/dev/socket/dnsproxyd u:object_r:dnsproxyd_socket:s0
/dev/socket/dumpstate u:object_r:dumpstate_socket:s0
/dev/socket/fwmarkd u:object_r:fwmarkd_socket:s0
/dev/socket/gps u:object_r:gps_socket:s0
/dev/socket/installd u:object_r:installd_socket:s0
/dev/socket/lmkd u:object_r:lmkd_socket:s0
/dev/socket/logd u:object_r:logd_socket:s0
/dev/socket/logdr u:object_r:logdr_socket:s0
/dev/socket/logdw u:object_r:logdw_socket:s0
/dev/socket/mdns u:object_r:mdns_socket:s0
/dev/socket/mdnsd u:object_r:mdnsd_socket:s0
/dev/socket/mtpd u:object_r:mtpd_socket:s0
/dev/socket/netd u:object_r:netd_socket:s0
/dev/socket/property_service u:object_r:property_socket:s0
/dev/socket/racoon u:object_r:racoon_socket:s0
/dev/socket/rild u:object_r:rild_socket:s0
/dev/socket/rild-debug u:object_r:rild_debug_socket:s0
/dev/socket/vold u:object_r:vold_socket:s0
/dev/socket/wpa_eth[0-9] u:object_r:wpa_socket:s0
/dev/socket/wpa_wlan[0-9] u:object_r:wpa_socket:s0
/dev/socket/zygote u:object_r:zygote_socket:s0
/dev/socket/zygote_secondary u:object_r:zygote_socket:s0
/dev/spdif_out.* u:object_r:audio_device:s0
/dev/tegra.* u:object_r:video_device:s0
/dev/tf_driver u:object_r:tee_device:s0
/dev/tty u:object_r:owntty_device:s0
/dev/tty[0-9]* u:object_r:tty_device:s0
/dev/ttyS[0-9]* u:object_r:serial_device:s0
/dev/tun u:object_r:tun_device:s0
/dev/uhid u:object_r:uhid_device:s0
/dev/uinput u:object_r:uhid_device:s0
/dev/uio[0-9]* u:object_r:uio_device:s0
/dev/urandom u:object_r:urandom_device:s0
/dev/usb_accessory u:object_r:usbaccessory_device:s0
/dev/vcs[0-9a-z]* u:object_r:vcs_device:s0
/dev/video[0-9]* u:object_r:video_device:s0
/dev/watchdog u:object_r:watchdog_device:s0
/dev/xt_qtaguid u:object_r:qtaguid_device:s0
/dev/zero u:object_r:zero_device:s0
/dev/__kmsg__ u:object_r:klog_device:s0
/dev/__properties__ u:object_r:properties_device:s0
#############################
# System files
#
/system(/.*)? u:object_r:system_file:s0
/system/bin/e2fsck -- u:object_r:fsck_exec:s0
/system/bin/fsck\.f2fs -- u:object_r:fsck_exec:s0
/system/bin/fsck_msdos -- u:object_r:fsck_exec:s0
/system/bin/toolbox -- u:object_r:toolbox_exec:s0
/system/bin/toybox -- u:object_r:toolbox_exec:s0
/system/bin/logcat -- u:object_r:logcat_exec:s0
/system/bin/sh -- u:object_r:shell_exec:s0
/system/bin/run-as -- u:object_r:runas_exec:s0
/system/bin/bootanimation u:object_r:bootanim_exec:s0
/system/bin/app_process32 u:object_r:zygote_exec:s0/system/bin/app_process64 u:object_r:zygote_exec:s0
/system/bin/servicemanager u:object_r:servicemanager_exec:s0
/system/bin/surfaceflinger u:object_r:surfaceflinger_exec:s0
/system/bin/drmserver u:object_r:drmserver_exec:s0
/system/bin/dumpstate u:object_r:dumpstate_exec:s0
/system/bin/vold u:object_r:vold_exec:s0
/system/bin/netd u:object_r:netd_exec:s0
/system/bin/rild u:object_r:rild_exec:s0
/system/bin/mediaserver u:object_r:mediaserver_exec:s0
/system/bin/mdnsd u:object_r:mdnsd_exec:s0
/system/bin/installd u:object_r:installd_exec:s0
/system/bin/keystore u:object_r:keystore_exec:s0
/system/bin/fingerprintd u:object_r:fingerprintd_exec:s0
/system/bin/gatekeeperd u:object_r:gatekeeperd_exec:s0
/system/bin/debuggerd u:object_r:debuggerd_exec:s0
/system/bin/debuggerd64 u:object_r:debuggerd_exec:s0
/system/bin/wpa_supplicant u:object_r:wpa_exec:s0
/system/bin/sdcard u:object_r:sdcardd_exec:s0
/system/bin/dhcpcd u:object_r:dhcp_exec:s0
/system/bin/mtpd u:object_r:mtp_exec:s0
/system/bin/pppd u:object_r:ppp_exec:s0
/system/bin/tf_daemon u:object_r:tee_exec:s0
/system/bin/racoon u:object_r:racoon_exec:s0
/system/xbin/su u:object_r:su_exec:s0
/system/xbin/procrank u:object_r:procrank_exec:s0
/system/xbin/perfprofd u:object_r:perfprofd_exec:s0
/system/xbin/simpleperf u:object_r:system_file:s0
/system/vendor/bin/gpsd u:object_r:gpsd_exec:s0
/system/bin/dnsmasq u:object_r:dnsmasq_exec:s0
/system/bin/hostapd u:object_r:hostapd_exec:s0
/system/bin/clatd u:object_r:clatd_exec:s0
/system/bin/lmkd u:object_r:lmkd_exec:s0
/system/bin/inputflinger u:object_r:inputflinger_exec:s0
/system/bin/logd u:object_r:logd_exec:s0
/system/bin/uncrypt u:object_r:uncrypt_exec:s0
/system/bin/logwrapper u:object_r:system_file:s0
/system/bin/vdc u:object_r:vdc_exec:s0
/system/bin/install-recovery.sh u:object_r:install_recovery_exec:s0
/system/bin/dex2oat u:object_r:dex2oat_exec:s0
# patchoat executable has (essentially) the same requirements as dex2oat.
/system/bin/patchoat u:object_r:dex2oat_exec:s0
/system/bin/sgdisk u:object_r:sgdisk_exec:s0
/system/bin/blkid u:object_r:blkid_exec:s0
/system/bin/tzdatacheck u:object_r:tzdatacheck_exec:s0
#############################
# Vendor files
#
/vendor(/.*)? u:object_r:system_file:s0
/vendor/bin/gpsd u:object_r:gpsd_exec:s0
#############################
# OEM and ODM files
#
/odm(/.*)? u:object_r:system_file:s0
/oem(/.*)? u:object_r:oemfs:s0
#############################
# Data files
#
# NOTE: When modifying existing label rules, changes may also need to
# propagate to the "Expanded data files" section.
#
/data(/.*)? u:object_r:system_data_file:s0
/data/.layout_version u:object_r:install_data_file:s0
/data/unencrypted(/.*)? u:object_r:unencrypted_data_file:s0
/data/backup(/.*)? u:object_r:backup_data_file:s0
/data/secure/backup(/.*)? u:object_r:backup_data_file:s0
/data/security(/.*)? u:object_r:security_file:s0/data/system/ndebugsocket u:object_r:system_ndebug_socket:s0
/data/drm(/.*)? u:object_r:drm_data_file:s0
/data/gps(/.*)? u:object_r:gps_data_file:s0
/data/resource-cache(/.*)? u:object_r:resourcecache_data_file:s0
/data/dalvik-cache(/.*)? u:object_r:dalvikcache_data_file:s0
/data/dalvik-cache/profiles(/.*)? u:object_r:dalvikcache_profiles_data_file:s0
/data/adb(/.*)? u:object_r:adb_data_file:s0
/data/anr(/.*)? u:object_r:anr_data_file:s0
/data/app(/.*)? u:object_r:apk_data_file:s0
/data/app/[^/]+/oat(/.*)? u:object_r:dalvikcache_data_file:s0
/data/app/vmdl[^/]+\.tmp(/.*)? u:object_r:apk_tmp_file:s0
/data/app/vmdl[^/]+\.tmp/oat(/.*)? u:object_r:dalvikcache_data_file:s0
/data/app-private(/.*)? u:object_r:apk_private_data_file:s0
/data/app-private/vmdl.*\.tmp(/.*)? u:object_r:apk_private_tmp_file:s0
/data/tombstones(/.*)? u:object_r:tombstone_data_file:s0
/data/local/tmp(/.*)? u:object_r:shell_data_file:s0
/data/media(/.*)? u:object_r:media_rw_data_file:s0
/data/mediadrm(/.*)? u:object_r:media_data_file:s0
/data/property(/.*)? u:object_r:property_data_file:s0
# Misc data
/data/misc/adb(/.*)? u:object_r:adb_keys_file:s0
/data/misc/audio(/.*)? u:object_r:audio_data_file:s0
/data/misc/bluetooth(/.*)? u:object_r:bluetooth_data_file:s0
/data/misc/bluedroid(/.*)? u:object_r:bluetooth_data_file:s0
/data/misc/bluedroid/\.a2dp_ctrl u:object_r:bluetooth_socket:s0
/data/misc/bluedroid/\.a2dp_data u:object_r:bluetooth_socket:s0
/data/misc/camera(/.*)? u:object_r:camera_data_file:s0
/data/misc/dhcp(/.*)? u:object_r:dhcp_data_file:s0
/data/misc/gatekeeper(/.*)? u:object_r:gatekeeper_data_file:s0
/data/misc/keychain(/.*)? u:object_r:keychain_data_file:s0
/data/misc/keystore(/.*)? u:object_r:keystore_data_file:s0
/data/misc/logd(/.*)? u:object_r:misc_logd_file:s0
/data/misc/media(/.*)? u:object_r:media_data_file:s0
/data/misc/net(/.*)? u:object_r:net_data_file:s0
/data/misc/shared_relro(/.*)? u:object_r:shared_relro_file:s0
/data/misc/sms(/.*)? u:object_r:radio_data_file:s0
/data/misc/systemkeys(/.*)? u:object_r:systemkeys_data_file:s0
/data/misc/user(/.*)? u:object_r:misc_user_data_file:s0
/data/misc/vpn(/.*)? u:object_r:vpn_data_file:s0
/data/misc/wifi(/.*)? u:object_r:wifi_data_file:s0
/data/misc/wifi/sockets(/.*)? u:object_r:wpa_socket:s0
/data/misc/wifi/sockets/wpa_ctrl.* u:object_r:system_wpa_socket:s0
/data/misc/wifi/hostapd(/.*)? u:object_r:wpa_socket:s0
/data/misc/zoneinfo(/.*)? u:object_r:zoneinfo_data_file:s0
/data/misc/vold(/.*)? u:object_r:vold_data_file:s0
/data/misc/perfprofd(/.*)? u:object_r:perfprofd_data_file:s0
/data/system/heapdump(/.*)? u:object_r:heapdump_data_file:s0
# Fingerprint data
/data/system/users/[0-9]+/fpdata(/.*)? u:object_r:fingerprintd_data_file:s0
# Bootchart data
/data/bootchart(/.*)? u:object_r:bootchart_data_file:s0
#############################
# Expanded data files
#
/mnt/expand(/.*)? u:object_r:mnt_expand_file:s0
/mnt/expand/[^/]+(/.*)? u:object_r:system_data_file:s0
/mnt/expand/[^/]+/app(/.*)? u:object_r:apk_data_file:s0
/mnt/expand/[^/]+/app/[^/]+/oat(/.*)? u:object_r:dalvikcache_data_file:s0
/mnt/expand/[^/]+/app/vmdl[^/]+\.tmp(/.*)? u:object_r:apk_tmp_file:s0
/mnt/expand/[^/]+/app/vmdl[^/]+\.tmp/oat(/.*)? u:object_r:dalvikcache_data_file:s0
/mnt/expand/[^/]+/local/tmp(/.*)? u:object_r:shell_data_file:s0
/mnt/expand/[^/]+/media(/.*)? u:object_r:media_rw_data_file:s0
/mnt/expand/[^/]+/misc/vold(/.*)? u:object_r:vold_data_file:s0
# coredump directory for userdebug/eng devices
/cores(/.*)? u:object_r:coredump_file:s0
# Wallpaper file for other users
/data/system/users/[0-9]+/wallpaper u:object_r:wallpaper_file:s0
#############################
# efs files
#
/efs(/.*)? u:object_r:efs_file:s0
#############################
# Cache files
#
/cache(/.*)? u:object_r:cache_file:s0
/cache/.*\.data u:object_r:cache_backup_file:s0
/cache/.*\.restore u:object_r:cache_backup_file:s0
# LocalTransport (backup) uses this directory
/cache/backup(/.*)? u:object_r:cache_backup_file:s0
#############################
# sysfs files
#
/sys/devices/platform/nfc-power/nfc_power -- u:object_r:sysfs_nfc_power_writable:s0
/sys/devices/system/cpu(/.*)? u:object_r:sysfs_devices_system_cpu:s0
/sys/power/wake_lock -- u:object_r:sysfs_wake_lock:s0
/sys/power/wake_unlock -- u:object_r:sysfs_wake_lock:s0
/sys/kernel/uevent_helper -- u:object_r:usermodehelper:s0
/sys/module/lowmemorykiller(/.*)? -- u:object_r:sysfs_lowmemorykiller:s0
#############################
# asec containers
/mnt/asec(/.*)? u:object_r:asec_apk_file:s0
/mnt/asec/[^/]+/[^/]+\.zip u:object_r:asec_public_file:s0
/mnt/asec/[^/]+/lib(/.*)? u:object_r:asec_public_file:s0
/data/app-asec(/.*)? u:object_r:asec_image_file:s0
#############################
# external storage
/mnt/media_rw(/.*)? u:object_r:mnt_media_rw_file:s0
/mnt/user(/.*)? u:object_r:mnt_user_file:s0
/mnt/runtime_default(/.*)? u:object_r:storage_file:s0
/mnt/runtime_read(/.*)? u:object_r:storage_file:s0
/mnt/runtime_write(/.*)? u:object_r:storage_file:s0
/storage(/.*)? u:object_r:storage_file:s0