Comment 36 for bug 1904730

Verified for bionic-ussuri using the test script in comment #33

ubuntu@node-lepaute:~$ dpkg -l | grep pyroute2
ii python3-pyroute2 0.5.9-0ubuntu1~cloud0 all Python3 Netlink library
ubuntu@node-lepaute:~$ echo 63 | sudo tee /sys/class/net/enp3s0f0/device/sriov_numvfs
63
ubuntu@node-lepaute:~$ ./test-lp1904730.sh
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1311, in _ft_decode_generic
    self.decode_nlas(offset)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1436, in decode_nlas
    offset)
struct.error: unpack_from requires a buffer of at least 4 bytes

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./test-lp1904730.sh", line 7, in <module>
    link = ip.link('get', index=link_idx, ext_mask=1)[0]
  File "/usr/lib/python3/dist-packages/pyroute2/iproute/linux.py", line 1332, in link
    msg_flags=msg_flags)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 373, in nlm_request
    return tuple(self._genlm_request(*argv, **kwarg))
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 864, in nlm_request
    callback=callback):
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 376, in get
    return tuple(self._genlm_get(*argv, **kwarg))
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 701, in get
    raise msg['header']['error']
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 177, in parse
    msg.decode()
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/rtnl/ifinfmsg/__init__.py", line 1087, in decode
    nlmsg.decode(self)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 982, in decode
    self._ft_decode(self, offset)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1314, in _ft_decode_generic
    raise NetlinkNLADecodeError(e)
pyroute2.netlink.exceptions.NetlinkNLADecodeError: unpack_from requires a buffer of at least 4 bytes
ubuntu@node-lepaute:~$ sudo add-apt-repository cloud-archive:ussuri-proposed
 Ubuntu Cloud Archive for OpenStack Ussuri [proposed]
 More info: https://wiki.ubuntu.com/OpenStack/CloudArchive
Press [ENTER] to continue or Ctrl-c to cancel adding it.
...
ubuntu@node-lepaute:~$ sudo apt-get upgrade python3-pyroute2
...
ubuntu@node-lepaute:~$ dpkg -l | grep pyroute2
ii python3-pyroute2 0.5.9-0ubuntu2~cloud0 all Python3 Netlink library
ubuntu@node-lepaute:~$ ./test-lp1904730.sh
63