Log - hostapd trying to update accounting statistics, station not found , ] trying to deauthenticate to station, but not authenticated

Question

I am seeing log entries and want to see is security problem.
 Log Message from AP xxx.xxx.xxx.xxx
TIME                Priority  Process Id                Message 
Sep 18 2014 11:0       3        hostapd[941]            trying to update accounting statistics, station not found
Sep 18 2014 11:0       3        hostapd[941]            trying to deauthenticate to station but not authenticated 

Answer 1

Hi mbalbuena
you are not mentioning what kind of authentication (WPA-Enterprise, WPA-PSK,..) are you using for your wifi network. That could be related to RADIUS accounting feature (in case of WPA-Enterprise with RADIUS accounting enabled/checked) but I am not sure.
But nevertheless of that I hope this is just information that:
Some client wanted to authenticate to your network, but it fails. This resulted to explicit deauthentication of that client by your WAP (regardless of fact if client was really authenticated or not at beginning). Forced deauthentication makes sense for example in case, that client was successfully connected to your Wifi, but it fails to reauthenticate (yes, every client is challenged to reauthenticate regularly after defined period of time) for some reason - in this case forced deauthentication ensures that user will get kicked off from your Wifi network. That's my explanation of second Log line.
First line is just triggered action resulted "deauthentication" process - i.e. gather accounting statistics of that client. But in your case it fails, because that client was never really connected to your Wifi network and thus there are no records in statistics table for him.