stack trace: warning at .../sta_info.c:451 in LEDE 17.01.0

[Gui Iribarren]

dumping here more things i come across while using LEDE 17.01.0 on a
TL-WR842ND

a strange crash in wifi:

http://pastebin.com/THLMDT6C

WARNING: CPU: 0 PID: 22264 at
compat-wireless-2016-10-08/net/mac80211/sta_info.c:451 0x80e84f90
[mac80211 at 80e80000+0x5f540]()

does that ring a bell for anyone?
or is just a harmless warning?

(adhoc vif was still working, but a vlan built on top of that was
missing, which was veeeery strange. after running "wifi", everything
came up again fine)

cheers!