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There was an issue with EAPOL frame exchanges in a multi-BSS configuration when a station switches between the BSSes controlled by the same hostapd process. When processing the EAPOL packet, the array of virtual APs (iface->bss) is searched looking for the station that sent the packet in order to identify which signal context should be used during processing. The first match of the station in its list gets used in the ieee802_1x_receive() function. However, even after a station has disassociated, it remains in the list of stations pending an inactivity timeout. This leads to the wrong hapd context (one where the station had already disassociated) being used in some cases (if the current/active bss entry appears in the list after one where the station has just disassociated from) for EAPOL processing. Fix this by checking the WLAN_STA_ASSOC flag before assuming the right hapd context was found for the given station. Signed-hostap: David Bird <dbird@powercloudsystems.com> intended-for: hostap-1
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