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nl80211: Do not ignore disconnection event after a connection event

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After a disconnect command is issued, wpa_supplicant generates a
disconnection event to self and ignores the next disconnection event
coming from the driver.  In a race condition in which the driver
generates a connected event due to roaming just before receiving the
disconnect command from userspace, wpa_supplicant processes the
connected event after processing the self-generated disconnection event
and enters WPA_COMPLETED state. The driver sends a disconnection event
after processing the disconnect command sent by wpa_supplicant but the
disconnection event is ignored by wpa_supplicant as the disconnection
event is considered to be a result of locally generated disconnect
command. Thus, wpa_supplicant continues to be in the connected
(WPA_COMPLETED) state though the driver is in disconnected state.

Fix this out-of-sync behavior between the driver and wpa_supplicant by
not ignoring the disconnection event from the driver because of the
locally generated disconnect command sent to the driver if there is a
connection event received after issuing the disconnect command to the
driver.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Vamsi Krishna 2020-12-18 22:50:00 +05:30 committed by Jouni Malinen
parent b3f88b15fb
commit b4a41abad4
1 changed files with 7 additions and 0 deletions
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7
src/drivers/driver_nl80211_event.c
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@ -571,6 +571,13 @@ static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
event.assoc_info.fils_pmkid = nla_data(fils_pmkid);
wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
/* Avoid a race condition by stopping to ignore any following
* disconnection events now that the driver has indicated it is
* connected since that connection could have been triggered by a roam
* operation that happened in parallel with the disconnection request.
*/
drv->ignore_next_local_disconnect = 0;
}