Group key renewal problem

[Henrik Brix Andersen]

Hi,

I've just upgraded my HostAP based access point to linux-2.6.16-rc5 to
try out the in-kernel hostap_pci driver.

After the upgrade, my clients are disconnected at each group key
renewal, with the following messages spewed in the system log
(hostap-0.4.7 client):

Mar 11 18:58:48 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68
Mar 11 18:58:48 fangorn wifi0: decryption failed (SA=00:02:6f:37:fc:68) res=-2
Mar 11 18:58:49 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68
Mar 11 18:58:49 fangorn wifi0: decryption failed (SA=00:02:6f:37:fc:68) res=-2
Mar 11 18:58:50 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68
Mar 11 18:58:50 fangorn wifi0: decryption failed (SA=00:02:6f:37:fc:68) res=-2
Mar 11 18:58:51 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68
Mar 11 18:58:51 fangorn wifi0: decryption failed (SA=00:02:6f:37:fc:68) res=-2
Mar 11 18:58:51 fangorn wifi0: LinkStatus=2 (Disconnected)
Mar 11 18:58:51 fangorn wifi0: LinkStatus: BSSID=00:02:6f:37:fc:68

(ipw2200-1.1.1 client):

Mar 11 19:00:48 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68
Mar 11 19:00:49 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68
Mar 11 19:00:50 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68
Mar 11 19:00:51 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68

After a few seconds, wpa_supplicant reauthenticates with the AP, and
everything works until the next group key renewal kicks in. I'm using
hostapd-0.5.1 and wpa_supplicant-0.5.1 with WPA2-PSK CCMP.

Any idea as to how I can debug this further?

Regards,
Brix
-- 
Henrik Brix Andersen <brix at gentoo.org>
Gentoo Metadistribution | Mobile computing herd
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