mac80211: fix AP mode EAP tx for VLAN stations

EAP frames for stations in an AP VLAN are sent on the main AP interface
to avoid race conditions wrt. moving stations.
For that to work properly, sta_info_get_bss must be used instead of
sta_info_get when sending EAP packets.
Previously this was only done for cooked monitor injected packets, so
this patch adds a check for tx->skb->protocol to the same place.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 782a60198df46977754c8720f101ed8016b928e5..e76facc69e952c9aedb835bbfeedbb7fbea0d5ea 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1158,7 +1158,8 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
                tx->sta = rcu_dereference(sdata->u.vlan.sta);
                if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
                        return TX_DROP;
-       } else if (info->flags & IEEE80211_TX_CTL_INJECTED) {
+       } else if (info->flags & IEEE80211_TX_CTL_INJECTED ||
+                  tx->sdata->control_port_protocol == tx->skb->protocol) {
                tx->sta = sta_info_get_bss(sdata, hdr->addr1);
        }
        if (!tx->sta)