netlink.py AttrListPacker: alen is not enough

[mikezsin]

kernel: 5.4.6-gentoo

` ipPools = ipvsC.get_pools()
File "/root/.local/lib64/python3.6/site-packages/gnlpy/ipvs.py", line 581, in get_pools
dests = self.get_dests(svc_lst)
File "/root/.local/lib64/python3.6/site-packages/gnlpy/ipvs.py", line 618, in get_dests
dst_lst = dst_msg.get_attr_list().get('dest')
File "/root/.local/lib64/python3.6/site-packages/gnlpy/netlink.py", line 233, in get
return self.attrs[key]
KeyError: 2

`

nlmsg

trace-new.log

[mikezsin]

https://lwn.net/Articles/785241/

[oblazek]

yeah getting similar exception in 5.3.0-62-generic with KeyError 13.. haven't looked deeply into what netlink does here, but can be fixed and seems to work if you just add try/except into unpack method and return attr_list without any change on KeyError.