From 77ffb25cbcce0f3f2d4184fc5595ac69570e1d51 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 20 Mar 2015 14:05:02 +0100 Subject: [PATCH] mac80211: drop 4-addr VLAN frames earlier if not connected If there's no station on the 4-addr VLAN interface, then frames cannot be transmitted. Drop such frames earlier, before setting up all the information for them. We should keep the old check though since that code might be used for other internally-generated frames. Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index dcf60ee38b93f..1d6344679bf1d 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1842,6 +1842,9 @@ static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); wme_sta = sta->sta.wme; have_station = true; + } else if (sdata->wdev.use_4addr) { + ret = -ENOLINK; + goto free; } ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); -- 2.39.5