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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: Ido Yariv <ido@wizery.com>
Cc: stable@vger.kernel.org
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Eliad Peller 2012-06-01 11:14:03 +03:00 committed by Johannes Berg
parent 79543d8eec
commit 88a9e31c50
1 changed files with 6 additions and 7 deletions
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13
net/mac80211/mlme.c
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@ -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);