mac80211: fix fast-rx encryption check

When using WEP, the default unicast key needs to be selected, instead of
the STA PTK.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20201218184718.93650-5-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 13b9bcc4865deb38644d15bbe0cdc4ee28f5bdd2..972895e9f22dc5e4b977087bba880f9a40fcdcdb 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -4176,6 +4176,8 @@ void ieee80211_check_fast_rx(struct sta_info *sta)
 
        rcu_read_lock();
        key = rcu_dereference(sta->ptk[sta->ptk_idx]);
+       if (!key)
+               key = rcu_dereference(sdata->default_unicast_key);
        if (key) {
                switch (key->conf.cipher) {
                case WLAN_CIPHER_SUITE_TKIP: