Public bug reported:

Currently libseccomp version in Ubuntu are:

 libseccomp | 2.2.3-3ubuntu3               | xenial                     | source
 libseccomp | 2.3.1-2ubuntu2               | yakkety                    | source
 libseccomp | 2.3.1-2.1ubuntu1             | zesty                      | source

The difference between 2.2.3 and 2.3.1 is 63 upstream commits.

Of those commits, 7 are already cherrypicked into xenial for s390x
support.

However that s390x support is incomplete as multiplexed syscalls are not
supported.

A request has been filed to support multiplexed syscalls in libseccomp
in xenial at
https://bugs.launchpad.net/ubuntu/+source/libseccomp/+bug/1679691

That is a request for further 18 commits to backport, bringing the total
to 25.

Looking at the remaining 38 commits there are:
- documentation updates
- tools updates
- tests updates
- bugfixes
- updates to syscall tables for linux 4.3, 4.5-rc4+

IMHO, in the future when libseccomp is updated to support 4.10 kernel
syscalls, it should be backported back to xenial too, to properly suppor
the HWE kernels.

** Affects: libseccomp (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: libseccomp (Ubuntu Xenial)
     Importance: High
     Assignee: Dimitri John Ledkov (xnox)
         Status: Confirmed

** Also affects: libseccomp (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: libseccomp (Ubuntu Xenial)
       Status: New => Confirmed

** Changed in: libseccomp (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: libseccomp (Ubuntu Xenial)
     Assignee: (unassigned) => Dimitri John Ledkov (xnox)

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https://bugs.launchpad.net/bugs/1682102

Title:
  libseccomp should support GA and HWE kernels

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