How to prevent unknown action category 3 or invalid frame from crashing hostap daemon

Jouni Malinen j
Mon Jul 25 13:10:53 PDT 2011

On Mon, Jul 25, 2011 at 02:38:30PM -0400, austin wonderly wrote:
> hello! thanks for responding :) im currently in the process of trying to get
> it to do the same thing again in order to pull up a log, but would the fact
> that the mac address for the invalid frame is coming from a single client
> make any difference, as i have a few devices on the network including a
> android cellhphone and a mac that are producing the category 3 messages, the
> one that is producing them is windows 7 laptop. also for hostapd, i have a
> dwa-552 wifi card running on a proliant dl380 server. i will also grab the
> config file too incase there are any obvious errors.

That debug entry from hostapd does not indicate that the Block Ack
Action frame would be invalid; it just says that hostapd does not
recognize the frame (and it should not since it does not process that
frame). However, that frame should not really be delivered to hostapd in
the first place..

Which driver and/or Linux kernel version are you using? Which version of
hostapd are you using?

Jouni Malinen                                            PGP id EFC895FA

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