wifi: mac80211: fix possible leak in ieee80211_tx_control_port()

Add missing dev_kfree_skb() in an error path in
ieee80211_tx_control_port() to avoid a memory leak.

Fixes: dd820ed6336a ("wifi: mac80211: return error from control port TX for drops")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220818043349.4168835-1-yangyingliang@huawei.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 45df993..594bd70 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -5885,6 +5885,7 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
        rcu_read_lock();
        err = ieee80211_lookup_ra_sta(sdata, skb, &sta);
        if (err) {
+               dev_kfree_skb(skb);
                rcu_read_unlock();
                return err;
        }