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  1. 02 8月, 2011 1 次提交
  3. 27 7月, 2011 1 次提交
  5. 28 3月, 2009 1 次提交
    • P
      netlabel: Label incoming TCP connections correctly in SELinux · 389fb800
      由 Paul Moore 提交于 
      The current NetLabel/SELinux behavior for incoming TCP connections works but
only through a series of happy coincidences that rely on the limited nature of
standard CIPSO (only able to convey MLS attributes) and the write equality
imposed by the SELinux MLS constraints.  The problem is that network sockets
created as the result of an incoming TCP connection were not on-the-wire
labeled based on the security attributes of the parent socket but rather based
on the wire label of the remote peer.  The issue had to do with how IP options
were managed as part of the network stack and where the LSM hooks were in
relation to the code which set the IP options on these newly created child
sockets.  While NetLabel/SELinux did correctly set the socket's on-the-wire
label it was promptly cleared by the network stack and reset based on the IP
options of the remote peer.

This patch, in conjunction with a prior patch that adjusted the LSM hook
locations, works to set the correct on-the-wire label format for new incoming
connections through the security_inet_conn_request() hook.  Besides the
correct behavior there are many advantages to this change, the most significant
is that all of the NetLabel socket labeling code in SELinux now lives in hooks
which can return error codes to the core stack which allows us to finally get
ride of the selinux_netlbl_inode_permission() logic which greatly simplfies
the NetLabel/SELinux glue code.  In the process of developing this patch I
also ran into a small handful of AF_INET6 cleanliness issues that have been
fixed which should make the code safer and easier to extend in the future.
Signed-off-by: NPaul Moore <paul.moore@hp.com>
Acked-by: NCasey Schaufler <casey@schaufler-ca.com>
Signed-off-by: NJames Morris <jmorris@namei.org>
      389fb800
  7. 01 1月, 2009 1 次提交
  9. 10 10月, 2008 4 次提交
    • P
      cipso: Add support for native local labeling and fixup mapping names · 15c45f7b
      由 Paul Moore 提交于 
      This patch accomplishes three minor tasks: add a new tag type for local
labeling, rename the CIPSO_V4_MAP_STD define to CIPSO_V4_MAP_TRANS and
replace some of the CIPSO "magic numbers" with constants from the header
file.  The first change allows CIPSO to support full LSM labels/contexts,
not just MLS attributes.  The second change brings the mapping names inline
with what userspace is using, compatibility is preserved since we don't
actually change the value.  The last change is to aid readability and help
prevent mistakes.
Signed-off-by: NPaul Moore <paul.moore@hp.com>
      15c45f7b
    • P
      selinux: Set socket NetLabel based on connection endpoint · 014ab19a
      由 Paul Moore 提交于 
      Previous work enabled the use of address based NetLabel selectors, which while
highly useful, brought the potential for additional per-packet overhead when
used.  This patch attempts to solve that by applying NetLabel socket labels
when sockets are connect()'d.  This should alleviate the per-packet NetLabel
labeling for all connected sockets (yes, it even works for connected DGRAM
sockets).
Signed-off-by: NPaul Moore <paul.moore@hp.com>
Reviewed-by: NJames Morris <jmorris@namei.org>
      014ab19a
    • P
      netlabel: Add functionality to set the security attributes of a packet · 948bf85c
      由 Paul Moore 提交于 
      This patch builds upon the new NetLabel address selector functionality by
providing the NetLabel KAPI and CIPSO engine support needed to enable the
new packet-based labeling.  The only new addition to the NetLabel KAPI at
this point is shown below:

 * int netlbl_skbuff_setattr(skb, family, secattr)

... and is designed to be called from a Netfilter hook after the packet's
IP header has been populated such as in the FORWARD or LOCAL_OUT hooks.

This patch also provides the necessary SELinux hooks to support this new
functionality.  Smack support is not currently included due to uncertainty
regarding the permissions needed to expand the Smack network access controls.
Signed-off-by: NPaul Moore <paul.moore@hp.com>
Reviewed-by: NJames Morris <jmorris@namei.org>
      948bf85c
    • P
      netlabel: Replace protocol/NetLabel linking with refrerence counts · b1edeb10
      由 Paul Moore 提交于 
      NetLabel has always had a list of backpointers in the CIPSO DOI definition
structure which pointed to the NetLabel LSM domain mapping structures which
referenced the CIPSO DOI struct.  The rationale for this was that when an
administrator removed a CIPSO DOI from the system all of the associated
NetLabel LSM domain mappings should be removed as well; a list of
backpointers made this a simple operation.

Unfortunately, while the backpointers did make the removal easier they were
a bit of a mess from an implementation point of view which was making
further development difficult.  Since the removal of a CIPSO DOI is a
realtively rare event it seems to make sense to remove this backpointer
list as the optimization was hurting us more then it was helping.  However,
we still need to be able to track when a CIPSO DOI definition is being used
so replace the backpointer list with a reference count.  In order to
preserve the current functionality of removing the associated LSM domain
mappings when a CIPSO DOI is removed we walk the LSM domain mapping table,
removing the relevant entries.
Signed-off-by: NPaul Moore <paul.moore@hp.com>
Reviewed-by: NJames Morris <jmorris@namei.org>
      b1edeb10
  11. 09 6月, 2007 1 次提交
  13. 26 4月, 2007 1 次提交
  15. 03 12月, 2006 1 次提交
  17. 30 9月, 2006 1 次提交
  19. 29 9月, 2006 1 次提交
  21. 26 9月, 2006 2 次提交
  23. 23 9月, 2006 3 次提交