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security_classes
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Stephen Smalley authored
Kernel commit 8e4ff6f228e4722cac74db716e308d1da33d744f (selinux: distinguish non-init user namespace capability checks) introduced support for distinguishing capability checks against a target associated with the init user namespace versus capability checks against a target associated with a non-init user namespace by defining and using separate security classes for the latter. This support is needed on Linux to support e.g. Chrome usage of user namespaces for the Chrome sandbox without needing to allow Chrome to also exercise capabilities on targets in the init user namespace. Define the new security classes and access vectors for the Android policy. Refactor the original capability and capability2 access vector definitions as common declarations to allow reuse by the new cap_userns and cap2_userns classes. This change does not allow use of the new classes by any domain; that is deferred to future changes as needed if/when Android enables user namespaces and the Android version of Chrome starts using them. The kernel support went upstream in Linux 4.7. Based on the corresponding refpolicy patch by Chris PeBenito, but reworked for the Android policy. Test: policy builds Change-Id: I71103d39e93ee0e8c24816fca762944d047c2235 Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov>
Stephen Smalley authoredKernel commit 8e4ff6f228e4722cac74db716e308d1da33d744f (selinux: distinguish non-init user namespace capability checks) introduced support for distinguishing capability checks against a target associated with the init user namespace versus capability checks against a target associated with a non-init user namespace by defining and using separate security classes for the latter. This support is needed on Linux to support e.g. Chrome usage of user namespaces for the Chrome sandbox without needing to allow Chrome to also exercise capabilities on targets in the init user namespace. Define the new security classes and access vectors for the Android policy. Refactor the original capability and capability2 access vector definitions as common declarations to allow reuse by the new cap_userns and cap2_userns classes. This change does not allow use of the new classes by any domain; that is deferred to future changes as needed if/when Android enables user namespaces and the Android version of Chrome starts using them. The kernel support went upstream in Linux 4.7. Based on the corresponding refpolicy patch by Chris PeBenito, but reworked for the Android policy. Test: policy builds Change-Id: I71103d39e93ee0e8c24816fca762944d047c2235 Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov>
security_classes 1.94 KiB
# FLASK
#
# Define the security object classes
#
# Classes marked as userspace are classes
# for userspace object managers
class security
class process
class system
class capability
# file-related classes
class filesystem
class file
class dir
class fd
class lnk_file
class chr_file
class blk_file
class sock_file
class fifo_file
# network-related classes
class socket
class tcp_socket
class udp_socket
class rawip_socket
class node
class netif
class netlink_socket
class packet_socket
class key_socket
class unix_stream_socket
class unix_dgram_socket
# sysv-ipc-related classes
class sem
class msg
class msgq
class shm
class ipc
# extended netlink sockets
class netlink_route_socket
class netlink_firewall_socket
class netlink_tcpdiag_socket
class netlink_nflog_socket
class netlink_xfrm_socket
class netlink_selinux_socket
class netlink_audit_socket
class netlink_ip6fw_socket
class netlink_dnrt_socket
# IPSec association
class association
# Updated Netlink class for KOBJECT_UEVENT family.
class netlink_kobject_uevent_socket
class appletalk_socket
class packet
# Kernel access key retention
class key
class dccp_socket
class memprotect
# network peer labels
class peer
# Capabilities >= 32
class capability2
# kernel services that need to override task security, e.g. cachefiles
class kernel_service
class tun_socket
class binder
# Updated netlink classes for more recent netlink protocols.
class netlink_iscsi_socket
class netlink_fib_lookup_socket
class netlink_connector_socket
class netlink_netfilter_socket
class netlink_generic_socket
class netlink_scsitransport_socket
class netlink_rdma_socket
class netlink_crypto_socket
# Capability checks when on a non-init user namespace
class cap_userns
class cap2_userns
# Property service
class property_service # userspace
# Service manager
class service_manager # userspace
# Keystore Key
class keystore_key # userspace
class drmservice # userspace
# FLASK