Commit 88a9e31c authored by Eliad Peller's avatar Eliad Peller Committed by Johannes Berg
Browse files

mac80211: clear ifmgd->bssid only after building DELBA 



ieee80211_set_disassoc() clears ifmgd->bssid before
building DELBA frames, resulting in frames with invalid
bssid ("00:00:00:00:00:00").

Fix it by clearing ifmgd->bssid only after building
all the needed frames.

After this change, we no longer need to save the
bssid (before clearing it), so remove the local array.

Reported-by: default avatarIdo Yariv <ido@wizery.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarEliad Peller <eliad@wizery.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 79543d8e

net/mac80211/mlme.c

+6 −7
Original line number Diff line number Diff line
@@ -1342,7 +1342,6 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 
	struct ieee80211_local *local = sdata->local;

	struct sta_info *sta;

	u32 changed = 0;

	u8 bssid[ETH_ALEN];



	ASSERT_MGD_MTX(ifmgd);
@@ -1354,10 +1353,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 


	ieee80211_stop_poll(sdata);



	memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);



	ifmgd->associated = NULL;

	memset(ifmgd->bssid, 0, ETH_ALEN);



	/*

	 * we need to commit the associated = NULL change because the
@@ -1377,7 +1373,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 
	netif_carrier_off(sdata->dev);



	mutex_lock(&local->sta_mtx);

	sta = sta_info_get(sdata, bssid);

	sta = sta_info_get(sdata, ifmgd->bssid);

	if (sta) {

		set_sta_flag(sta, WLAN_STA_BLOCK_BA);

		ieee80211_sta_tear_down_BA_sessions(sta, tx);
@@ -1386,13 +1382,16 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 


	/* deauthenticate/disassociate now */

	if (tx || frame_buf)

		ieee80211_send_deauth_disassoc(sdata, bssid, stype, reason,

					       tx, frame_buf);

		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,

					       reason, tx, frame_buf);



	/* flush out frame */

	if (tx)

		drv_flush(local, false);



	/* clear bssid only after building the needed mgmt frames */

	memset(ifmgd->bssid, 0, ETH_ALEN);



	/* remove AP and TDLS peers */

	sta_info_flush(local, sdata);

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