Commit e69e95db authored by Jouni Malinen's avatar Jouni Malinen Committed by John W. Linville
Browse files

mac80211: Send deauth/disassoc prior to dropping STA entry 



When management frame protection (IEEE 802.11w) is used, the
deauthentication and disassociation frames must be protected whenever
the encryption keys are configured. We were removing the STA entry and
with it, the keys, just before actually sending out these frames which
meant that the frames went out unprotected. The AP will drop them in
such a case. Fix this by reordering the operations a bit so that
sta_info_destroy_addr() gets called only after
ieee80211_send_deauth_disassoc().

Signed-off-by: default avatarJouni Malinen <j@w1.fi>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 17e4ec14

net/mac80211/mlme.c

+14 −9
Original line number Diff line number Diff line
@@ -782,7 +782,8 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 
	netif_carrier_on(sdata->dev);

}



static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)

static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,

				   bool remove_sta)

{

	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

	struct ieee80211_local *local = sdata->local;
@@ -855,6 +856,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata) 
	changed |= BSS_CHANGED_BSSID;

	ieee80211_bss_info_change_notify(sdata, changed);



	if (remove_sta)

		sta_info_destroy_addr(sdata, bssid);

}
@@ -968,7 +970,7 @@ static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata) 


	printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);



	ieee80211_set_disassoc(sdata);

	ieee80211_set_disassoc(sdata, true);

	ieee80211_recalc_idle(local);

	mutex_unlock(&ifmgd->mtx);

	/*
@@ -1034,7 +1036,7 @@ ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 
	printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",

			sdata->name, bssid, reason_code);



	ieee80211_set_disassoc(sdata);

	ieee80211_set_disassoc(sdata, true);

	ieee80211_recalc_idle(sdata->local);



	return RX_MGMT_CFG80211_DEAUTH;
@@ -1064,7 +1066,7 @@ ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 
	printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",

			sdata->name, mgmt->sa, reason_code);



	ieee80211_set_disassoc(sdata);

	ieee80211_set_disassoc(sdata, true);

	ieee80211_recalc_idle(sdata->local);

	return RX_MGMT_CFG80211_DISASSOC;

}
@@ -1712,7 +1714,7 @@ static void ieee80211_sta_work(struct work_struct *work) 
			printk(KERN_DEBUG "No probe response from AP %pM"

				" after %dms, disconnecting.\n",

				bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);

			ieee80211_set_disassoc(sdata);

			ieee80211_set_disassoc(sdata, true);

			ieee80211_recalc_idle(local);

			mutex_unlock(&ifmgd->mtx);

			/*
@@ -2014,7 +2016,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 
		}



		/* Trying to reassociate - clear previous association state */

		ieee80211_set_disassoc(sdata);

		ieee80211_set_disassoc(sdata, true);

	}

	mutex_unlock(&ifmgd->mtx);
@@ -2118,7 +2120,7 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 


	if (ifmgd->associated == req->bss) {

		bssid = req->bss->bssid;

		ieee80211_set_disassoc(sdata);

		ieee80211_set_disassoc(sdata, true);

		mutex_unlock(&ifmgd->mtx);

	} else {

		bool not_auth_yet = false;
@@ -2175,6 +2177,7 @@ int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 
			   void *cookie)

{

	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

	u8 bssid[ETH_ALEN];



	mutex_lock(&ifmgd->mtx);
@@ -2192,13 +2195,15 @@ int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 
	printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",

	       sdata->name, req->bss->bssid, req->reason_code);



	ieee80211_set_disassoc(sdata);

	memcpy(bssid, req->bss->bssid, ETH_ALEN);

	ieee80211_set_disassoc(sdata, false);



	mutex_unlock(&ifmgd->mtx);



	ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,

			IEEE80211_STYPE_DISASSOC, req->reason_code,

			cookie);

	sta_info_destroy_addr(sdata, bssid);



	ieee80211_recalc_idle(sdata->local);

CRA Git | Maintained and supported by SUSTech CRA and CCSE