blob: 3e48bd243cd58e1cf5bbd0108a29902054a66166 [file] [log] [blame]
# network manager
type netd, domain, mlstrustedsubject;
type netd_exec, system_file_type, exec_type, file_type;
# in addition to ioctls whitelisted for all domains, grant netd priv_sock_ioctls.
allowxperm netd self:udp_socket ioctl priv_sock_ioctls;
r_dir_file(netd, cgroup)
allow netd system_server:fd use;
allow netd self:global_capability_class_set { net_admin net_raw kill };
# Note: fsetid is deliberately not included above. fsetid checks are
# triggered by chmod on a directory or file owned by a group other
# than one of the groups assigned to the current process to see if
# the setgid bit should be cleared, regardless of whether the setgid
# bit was even set. We do not appear to truly need this capability
# for netd to operate.
dontaudit netd self:global_capability_class_set fsetid;
# Allow netd to open /dev/tun, set it up and pass it to clatd
allow netd tun_device:chr_file rw_file_perms;
allowxperm netd tun_device:chr_file ioctl { TUNGETIFF TUNSETIFF };
allow netd self:tun_socket create;
allow netd self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl;
allow netd self:netlink_route_socket nlmsg_write;
allow netd self:netlink_nflog_socket create_socket_perms_no_ioctl;
allow netd self:netlink_socket create_socket_perms_no_ioctl;
allow netd self:netlink_tcpdiag_socket { create_socket_perms_no_ioctl nlmsg_read nlmsg_write };
allow netd self:netlink_generic_socket create_socket_perms_no_ioctl;
allow netd self:netlink_netfilter_socket create_socket_perms_no_ioctl;
allow netd shell_exec:file rx_file_perms;
allow netd system_file:file x_file_perms;
not_full_treble(`allow netd vendor_file:file x_file_perms;')
allow netd devpts:chr_file rw_file_perms;
# Acquire advisory lock on /system/etc/xtables.lock
allow netd system_file:file lock;
# Allow netd to write to qtaguid ctrl file.
# TODO: Add proper rules to prevent other process to access qtaguid_proc file
# after migration complete
allow netd proc_qtaguid_ctrl:file rw_file_perms;
# Allow netd to read /dev/qtaguid. This is the same privilege level that normal apps have.
allow netd qtaguid_device:chr_file r_file_perms;
r_dir_file(netd, proc_net_type)
# For /proc/sys/net/ipv[46]/route/flush.
allow netd proc_net_type:file rw_file_perms;
# Enables PppController and interface enumeration (among others)
allow netd sysfs:dir r_dir_perms;
r_dir_file(netd, sysfs_net)
# Allows setting interface MTU
allow netd sysfs_net:file w_file_perms;
# TODO: added to match above sysfs rule. Remove me?
allow netd sysfs_usb:file write;
r_dir_file(netd, cgroup_bpf)
allow netd fs_bpf:dir search;
allow netd fs_bpf:file { read write setattr };
# TODO: netd previously thought it needed these permissions to do WiFi related
# work. However, after all the WiFi stuff is gone, we still need them.
# Why?
allow netd self:global_capability_class_set { dac_override dac_read_search chown };
# Needed to update /data/misc/net/rt_tables
allow netd net_data_file:file create_file_perms;
allow netd net_data_file:dir rw_dir_perms;
allow netd self:global_capability_class_set fowner;
# Needed to lock the iptables lock.
allow netd system_file:file lock;
# Allow netd to spawn dnsmasq in it's own domain
allow netd dnsmasq:process signal;
set_prop(netd, ctl_mdnsd_prop)
set_prop(netd, netd_stable_secret_prop)
# Allow netd to publish a binder service and make binder calls.
add_service(netd, netd_service)
add_service(netd, dnsresolver_service)
allow netd dumpstate:fifo_file { getattr write };
# Allow netd to call into the system server so it can check permissions.
allow netd system_server:binder call;
allow netd permission_service:service_manager find;
# Allow netd to talk to the framework service which collects netd events.
allow netd netd_listener_service:service_manager find;
# Allow netd to operate on sockets that are passed to it.
allow netd netdomain:{
} { read write getattr setattr getopt setopt };
allow netd netdomain:fd use;
# give netd permission to read and write netlink xfrm
allow netd self:netlink_xfrm_socket { create_socket_perms_no_ioctl nlmsg_write nlmsg_read };
# Allow netd to register as hal server.
add_hwservice(netd, system_net_netd_hwservice)
get_prop(netd, hwservicemanager_prop)
get_prop(netd, device_config_netd_native_prop)
### Neverallow rules
### netd should NEVER do any of this
# Block device access.
neverallow netd dev_type:blk_file { read write };
# ptrace any other app
neverallow netd { domain }:process ptrace;
# Write to /system.
neverallow netd system_file:dir_file_class_set write;
# Write to files in /data/data or system files on /data
neverallow netd { app_data_file privapp_data_file system_data_file }:dir_file_class_set write;
# only system_server, dumpstate and network stack app may find netd service
neverallow {
} netd_service:service_manager find;
# only system_server, dumpstate and network stack app may find dnsresolver service
neverallow {
} dnsresolver_service:service_manager find;
# apps may not interact with netd over binder.
neverallow { appdomain -network_stack -wifi_stack } netd:binder call;
neverallow netd { appdomain -network_stack -wifi_stack userdebug_or_eng(`-su') }:binder call;
# persist.netd.stable_secret contains RFC 7217 secret key which should never be
# leaked to other processes. Make sure it never leaks.
neverallow { domain -netd -init -dumpstate } netd_stable_secret_prop:file r_file_perms;
# We want to ensure that no other process ever tries tampering with persist.netd.stable_secret,
# the RFC 7217 secret key managed by netd. Doing so could compromise user privacy.
neverallow { domain -netd -init } netd_stable_secret_prop:property_service set;
# If an already existing file is opened with O_CREATE, the kernel might generate
# a false report of a create denial. Silence these denials and make sure that
# inappropriate permissions are not granted.
neverallow netd proc_net:dir no_w_dir_perms;
dontaudit netd proc_net:dir write;
neverallow netd sysfs_net:dir no_w_dir_perms;
dontaudit netd sysfs_net:dir write;