platform_system_sepolicy/public/shell.te

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# Domain for shell processes spawned by ADB or console service.
type shell, domain, mlstrustedsubject;
type shell_exec, exec_type, file_type;
2012-01-04 18:33:27 +01:00
# Create and use network sockets.
net_domain(shell)
# logcat
read_logd(shell)
control_logd(shell)
# logcat -L (directly, or via dumpstate)
allow shell pstorefs:dir search;
allow shell pstorefs:file r_file_perms;
# Root fs.
allow shell rootfs:dir r_dir_perms;
# read files in /data/anr
allow shell anr_data_file:dir r_dir_perms;
allow shell anr_data_file:file r_file_perms;
# Access /data/local/tmp.
allow shell shell_data_file:dir create_dir_perms;
allow shell shell_data_file:file create_file_perms;
allow shell shell_data_file:file rx_file_perms;
allow shell shell_data_file:lnk_file create_file_perms;
# Read and delete from /data/local/traces.
allow shell trace_data_file:file { r_file_perms unlink };
allow shell trace_data_file:dir { r_dir_perms remove_name write };
# Access /data/misc/profman.
allow shell profman_dump_data_file:dir { search getattr write remove_name };
allow shell profman_dump_data_file:file { getattr unlink };
# Read/execute files in /data/nativetest
userdebug_or_eng(`
allow shell nativetest_data_file:dir r_dir_perms;
allow shell nativetest_data_file:file rx_file_perms;
')
# adb bugreport
unix_socket_connect(shell, dumpstate, dumpstate)
allow shell devpts:chr_file rw_file_perms;
allow shell tty_device:chr_file rw_file_perms;
allow shell console_device:chr_file rw_file_perms;
allow shell input_device:dir r_dir_perms;
allow shell input_device:chr_file rw_file_perms;
r_dir_file(shell, system_file)
allow shell system_file:file x_file_perms;
allow shell toolbox_exec:file rx_file_perms;
allow shell tzdatacheck_exec:file rx_file_perms;
allow shell shell_exec:file rx_file_perms;
allow shell zygote_exec:file rx_file_perms;
r_dir_file(shell, apk_data_file)
# Set properties.
set_prop(shell, shell_prop)
set_prop(shell, ctl_bugreport_prop)
set_prop(shell, ctl_dumpstate_prop)
set_prop(shell, dumpstate_prop)
set_prop(shell, exported_dumpstate_prop)
set_prop(shell, debug_prop)
set_prop(shell, powerctl_prop)
set_prop(shell, log_tag_prop)
set_prop(shell, wifi_log_prop)
# adjust is_loggable properties
limit shell's access to log.* properties Restrict the ability of the shell to set the log.* properties. Namely: only allow the shell to set such properities on eng and userdebug builds. The shell (and other domains) can continue to read log.* properties on all builds. While there: harmonize permissions for log.* and persist.log.tag. Doing so introduces two changes: - log.* is now writable from from |system_app|. This mirrors the behavior of persist.log.tag, which is writable to support "Developer options" -> "Logger buffer sizes" -> "Off". (Since this option is visible on user builds, the permission is enabled for all builds.) - persist.log.tag can now be set from |shell| on userdebug_or_eng(). BUG=28221972 TEST=manual (see below) Testing details - user build (log.tag) $ adb shell setprop log.tag.foo V $ adb shell getprop log.tag <blank line> $ adb bugreport | grep log.tag.foo [ 146.525836] init: avc: denied { set } for property=log.tag.foo pid=4644 uid=2000 gid=2000 scontext=u:r:shell:s0 tcontext=u:object_r:log_prop:s0 tclass=property_service permissive=0 [ 146.525878] init: sys_prop: permission denied uid:2000 name:log.tag.foo - userdebug build (log.tag) $ adb shell getprop log.tag.foo <blank line> $ adb shell setprop log.tag.foo V $ adb shell getprop log.tag.foo V - user build (persist.log.tag) $ adb shell getprop | grep log.tag <no match> - Developer options -> Logger buffer sizes -> Off $ adb shell getprop | grep log.tag [persist.log.tag]: [Settings] [persist.log.tag.snet_event_log]: [I] Change-Id: Idf00e7a623723a7c46bf6d01e386aeca92b2ad75
2016-04-15 20:10:06 +02:00
userdebug_or_eng(`set_prop(shell, log_prop)')
# logpersist script
userdebug_or_eng(`set_prop(shell, logpersistd_logging_prop)')
userdebug_or_eng(`
# "systrace --boot" support - allow boottrace service to run
allow shell boottrace_data_file:dir rw_dir_perms;
allow shell boottrace_data_file:file create_file_perms;
set_prop(shell, persist_debug_prop)
')
# Read device's serial number from system properties
get_prop(shell, serialno_prop)
# Read state of logging-related properties
get_prop(shell, device_logging_prop)
# Read state of boot reason properties
get_prop(shell, bootloader_boot_reason_prop)
get_prop(shell, last_boot_reason_prop)
get_prop(shell, system_boot_reason_prop)
Allow shell to find all services. dumpsys from shell results in many denials: 11-08 02:52:13.087 171 171 E SELinux : avc: denied { find } for service=SurfaceFlinger scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager 11-08 02:52:13.089 171 171 E SELinux : avc: denied { find } for service=android.security.keystore scontext=u:r:shell:s0 tcontext=u:object_r:keystore_service:s0 tclass=service_manager 11-08 02:52:13.093 171 171 E SELinux : avc: denied { find } for service=batteryproperties scontext=u:r:shell:s0 tcontext=u:object_r:healthd_service:s0 tclass=service_manager 11-08 02:52:13.103 171 171 E SELinux : avc: denied { find } for service=display.qservice scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager 11-08 02:52:13.104 171 171 E SELinux : avc: denied { find } for service=drm.drmManager scontext=u:r:shell:s0 tcontext=u:object_r:drmserver_service:s0 tclass=service_manager 11-08 02:52:13.113 171 171 E SELinux : avc: denied { find } for service=media.audio_flinger scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.113 171 171 E SELinux : avc: denied { find } for service=media.audio_policy scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.113 171 171 E SELinux : avc: denied { find } for service=media.camera scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.114 171 171 E SELinux : avc: denied { find } for service=media.player scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.114 171 171 E SELinux : avc: denied { find } for service=media.sound_trigger_hw scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.118 171 171 E SELinux : avc: denied { find } for service=nfc scontext=u:r:shell:s0 tcontext=u:object_r:nfc_service:s0 tclass=service_manager 11-08 02:52:13.130 171 171 E SELinux : avc: denied { find } for service=SurfaceFlinger scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager 11-08 02:52:13.379 171 171 E SELinux : avc: denied { find } for service=android.security.keystore scontext=u:r:shell:s0 tcontext=u:object_r:keystore_service:s0 tclass=service_manager 11-08 02:52:13.388 171 171 E SELinux : avc: denied { find } for service=batteryproperties scontext=u:r:shell:s0 tcontext=u:object_r:healthd_service:s0 tclass=service_manager 11-08 02:52:13.574 171 171 E SELinux : avc: denied { find } for service=display.qservice scontext=u:r:shell:s0 tcontext=u:object_r:surfaceflinger_service:s0 tclass=service_manager 11-08 02:52:13.576 171 171 E SELinux : avc: denied { find } for service=drm.drmManager scontext=u:r:shell:s0 tcontext=u:object_r:drmserver_service:s0 tclass=service_manager 11-08 02:52:13.712 171 171 E SELinux : avc: denied { find } for service=media.audio_flinger scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.712 171 171 E SELinux : avc: denied { find } for service=media.audio_policy scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.713 171 171 E SELinux : avc: denied { find } for service=media.camera scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.713 171 171 E SELinux : avc: denied { find } for service=media.player scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager 11-08 02:52:13.713 171 171 E SELinux : avc: denied { find } for service=media.sound_trigger_hw scontext=u:r:shell:s0 tcontext=u:object_r:mediaserver_service:s0 tclass=service_manager Bug: 18799966 Change-Id: Id2bf69230338ac9dd45dc5d70f419fa41056e4fc
2015-01-24 00:55:42 +01:00
# allow shell access to services
allow shell servicemanager:service_manager list;
# don't allow shell to access GateKeeper service
# TODO: why is this so broad? Tightening candidate? It needs at list:
# - dumpstate_service (so it can receive dumpstate progress updates)
allow shell {
service_manager_type
-gatekeeper_service
-incident_service
-installd_service
-netd_service
-virtual_touchpad_service
-vold_service
-vr_hwc_service
}:service_manager find;
allow shell dumpstate:binder call;
# allow shell to get information from hwservicemanager
# for instance, listing hardware services with lshal
hwbinder_use(shell)
allow shell hwservicemanager:hwservice_manager list;
# allow shell to look through /proc/ for lsmod, ps, top, netstat.
r_dir_file(shell, proc_net)
allow shell {
proc_asound
proc_filesystems
proc_interrupts
proc_meminfo
proc_modules
proc_pid_max
proc_stat
proc_timer
proc_uptime
proc_version
proc_zoneinfo
}:file r_file_perms;
# allow listing network interfaces under /sys/class/net.
allow shell sysfs_net:dir r_dir_perms;
r_dir_file(shell, cgroup)
allow shell domain:dir { search open read getattr };
allow shell domain:{ file lnk_file } { open read getattr };
# statvfs() of /proc and other labeled filesystems
# (yaffs2, jffs2, ext2, ext3, ext4, xfs, btrfs, f2fs, squashfs)
allow shell { proc labeledfs }:filesystem getattr;
# stat() of /dev
allow shell device:dir getattr;
# allow shell to read /proc/pid/attr/current for ps -Z
allow shell domain:process getattr;
# Allow pulling the SELinux policy for CTS purposes
allow shell selinuxfs:dir r_dir_perms;
allow shell selinuxfs:file r_file_perms;
# enable shell domain to read/write files/dirs for bootchart data
# User will creates the start and stop file via adb shell
# and read other files created by init process under /data/bootchart
allow shell bootchart_data_file:dir rw_dir_perms;
allow shell bootchart_data_file:file create_file_perms;
# Make sure strace works for the non-privileged shell user
allow shell self:process ptrace;
# allow shell to get battery info
allow shell sysfs:dir r_dir_perms;
allow shell sysfs_batteryinfo:dir r_dir_perms;
allow shell sysfs_batteryinfo:file r_file_perms;
# Allow access to ion memory allocation device.
allow shell ion_device:chr_file rw_file_perms;
#
# filesystem test for insecure chr_file's is done
# via a host side test
#
allow shell dev_type:dir r_dir_perms;
allow shell dev_type:chr_file getattr;
# /dev/fd is a symlink
allow shell proc:lnk_file getattr;
#
# filesystem test for insucre blk_file's is done
# via hostside test
#
allow shell dev_type:blk_file getattr;
# read selinux policy files
allow shell file_contexts_file:file r_file_perms;
allow shell property_contexts_file:file r_file_perms;
allow shell seapp_contexts_file:file r_file_perms;
allow shell service_contexts_file:file r_file_perms;
allow shell sepolicy_file:file r_file_perms;
# Allow shell to start up vendor shell
allow shell vendor_shell_exec:file rx_file_perms;
###
### Neverallow rules
###
# Do not allow shell to hard link to any files.
# In particular, if shell hard links to app data
# files, installd will not be able to guarantee the deletion
# of the linked to file. Hard links also contribute to security
# bugs, so we want to ensure the shell user never has this
# capability.
neverallow shell file_type:file link;
# Do not allow privileged socket ioctl commands
neverallowxperm shell domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
# limit shell access to sensitive char drivers to
# only getattr required for host side test.
neverallow shell {
fuse_device
hw_random_device
kmem_device
port_device
}:chr_file ~getattr;
# Limit shell to only getattr on blk devices for host side tests.
neverallow shell dev_type:blk_file ~getattr;