Add a (default disabled) definition for the extended_socket_class policy
capability used to enable the use of separate socket security classes
for all network address families rather than the generic socket class.
The capability also enables the use of separate security classes for ICMP
and SCTP sockets, which were previously mapped to rawip_socket class.
Add definitions for the new socket classes and access vectors enabled by
this capability. Add the new socket classes to the socket_class_set macro,
which also covers allowing access by unconfined domains. Allowing access
by other domains to the new socket security classes is left to future
commits.
The kernel support will be included in Linux 4.11+.
Building policy with this capability enabled will require libsepol 2.7+.
This change leaves the capability disabled by default.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
- add systemd service macro sets
- add some documentation
- add some recursion to some macro sets (ipv perm, object class sets)
- deprecate domain_trans and domain_auto_trans
- remove unpriv_socket_class_set
Define new netlink socket security classes introduced by kernel commit
223ae516404a7a65f09e79a1c0291521c233336e.
Note that this does not remove the long-since obsolete
netlink_firewall_socket and netlink_ip6_fw_socket classes
from refpolicy in case they are still needed for legacy
distribution policies.
Add the new socket classes to socket_class_set.
Update ubac and mls constraints for the new socket classes.
Add allow rules for a few specific known cases (netutils, iptables,
netlabel, ifconfig, udev) in core policy that require access.
Further refinement for the contrib tree will be needed. Any allow
rule previously written on :netlink_socket may need to be rewritten or
duplicated for one of the more specific classes. For now, we retain the
existing :netlink_socket rules for compatibility on older kernels.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Personally I'd rather dump all those old compatibility macros, make them all
just display a message indicating the new correct thing to do and abort the
build. But if we are going to keep them then we need to update them and make
them work.
The attached patch adds write access to create_lnk_perms.
