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Date:   Sat, 12 Feb 2022 18:59:20 +0100
From:   Ondrej Mosnacek <>
To:,,,, Paul Moore <>
Cc:     Xin Long <>,
        Richard Haines <>,
        Vlad Yasevich <>,
        Neil Horman <>,
        Marcelo Ricardo Leitner <>,,,
Subject: [PATCH net v3 0/2] security: fixups for the security hooks in sctp

This is a third round of patches to fix the SCTP-SELinux interaction
w.r.t. client-side peeloff. The patches are a modified version of Xin
Long's patches posted previously, of which only a part was merged (the
rest was merged for a while, but was later reverted):

In gist, these patches replace the call to
security_inet_conn_established() in SCTP with a new hook
security_sctp_assoc_established() and implement the new hook in SELinux
so that the client-side association labels are set correctly (which
matters in case the association eventually gets peeled off into a
separate socket).

Note that other LSMs than SELinux don't implement the SCTP hooks nor
inet_conn_established, so they shouldn't be affected by any of these

These patches were tested by selinux-testsuite [1] with an additional
patch [2] and by lksctp-tools func_tests [3].

Changes since v2:
- patches 1 and 2 dropped as they are already in mainline (not reverted)
- in patch 3, the return value of security_sctp_assoc_established() is
  changed to int, the call is moved earlier in the function, and if the
  hook returns an error value, the packet will now be discarded,
  aborting the association
- patch 4 has been changed a lot - please see the patch description for
  details on how the hook is now implemented and why


Ondrej Mosnacek (2):
  security: add sctp_assoc_established hook
  security: implement sctp_assoc_established hook in selinux

 Documentation/security/SCTP.rst | 22 ++++----
 include/linux/lsm_hook_defs.h   |  2 +
 include/linux/lsm_hooks.h       |  5 ++
 include/linux/security.h        |  8 +++
 net/sctp/sm_statefuns.c         |  8 +--
 security/security.c             |  7 +++
 security/selinux/hooks.c        | 90 ++++++++++++++++++++++++---------
 7 files changed, 103 insertions(+), 39 deletions(-)


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