Verified for focal-wallaby using test script in comment #33.

ubuntu@node-lepaute:~$ dpkg -l | grep pyroute2
ii  python3-pyroute2                     0.5.14-0ubuntu1~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 1345, in _ft_decode_generic
    self.decode_nlas(offset)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1469, in decode_nlas
    (length, base_msg_type) = struct.unpack_from('HH', self.data,
struct.error: unpack_from requires a buffer of at least 19212 bytes for unpacking 4 bytes at offset 19208 (actual buffer size is 16384)

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 1358, in link
    ret = self.nlm_request(msg,
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 376, in nlm_request
    return tuple(self._genlm_request(*argv, **kwarg))
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 867, in nlm_request
    for msg in self.get(msg_seq=msg_seq,
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 379, in get
    return tuple(self._genlm_get(*argv, **kwarg))
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 704, 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 1092, in decode
    nlmsg.decode(self)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1016, in decode
    self._ft_decode(self, offset)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1348, in _ft_decode_generic
    raise NetlinkNLADecodeError(e)
pyroute2.netlink.exceptions.NetlinkNLADecodeError: unpack_from requires a buffer of at least 19212 bytes for unpacking 4 bytes at offset 19208 (actual buffer size is 16384)

ubuntu@node-lepaute:~$ sudo add-apt-repository cloud-archive:wallaby-proposed
 Ubuntu Cloud Archive for OpenStack Wallaby [proposed]
 More info: https://wiki.ubuntu.com/OpenStack/CloudArchive
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Reading package lists...
Building dependency tree...
Reading state information...
ubuntu-cloud-keyring is already the newest version (2020.02.11.4).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Get:1 http://ubuntu-cloud.archive.canonical.com/ubuntu focal-proposed/wallaby InRelease [8771 B]
Hit:2 http://ubuntu-cloud.archive.canonical.com/ubuntu focal-updates/wallaby InRelease
Hit:3 http://archive.ubuntu.com/ubuntu focal InRelease
Get:4 http://ubuntu-cloud.archive.canonical.com/ubuntu focal-proposed/wallaby/main amd64 Packages [155 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Fetched 492 kB in 1s (522 kB/s)  
Reading package lists... Done
ubuntu@node-lepaute:~$ sudo apt-get upgrade python3-pyroute2
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  python3-pyroute2
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 269 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://ubuntu-cloud.archive.canonical.com/ubuntu focal-proposed/wallaby/main amd64 python3-pyroute2 all 0.5.14-0ubuntu1.1~cloud0 [269 kB]
Fetched 269 kB in 0s (9234 kB/s)        
(Reading database ... 71815 files and directories currently installed.)
Preparing to unpack .../python3-pyroute2_0.5.14-0ubuntu1.1~cloud0_all.deb ...
Unpacking python3-pyroute2 (0.5.14-0ubuntu1.1~cloud0) over (0.5.14-0ubuntu1~cloud0) ...
Setting up python3-pyroute2 (0.5.14-0ubuntu1.1~cloud0) ...
ubuntu@node-lepaute:~$ 
ubuntu@node-lepaute:~$ dpkg -l | grep pyroute2
ii  python3-pyroute2                     0.5.14-0ubuntu1.1~cloud0              all          Python3 Netlink library
ubuntu@node-lepaute:~$ ./test-lp1904730.sh 
63
ubuntu@node-lepaute:~$