1 files changed, 7 insertions, 1 deletions

diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 9dc3b5f26e80..d91c1a26630d 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -154,7 +154,13 @@ update_iv:
         return RX_CONTINUE;
 
 mic_fail:
-        mac80211_ev_michael_mic_failure(rx->sdata, rx->key->conf.keyidx,
+        /*
+         * In some cases the key can be unset - e.g. a multicast packet, in
+         * a driver that supports HW encryption. Send up the key idx only if
+         * the key is set.
+         */
+        mac80211_ev_michael_mic_failure(rx->sdata,
+                                        rx->key ? rx->key->conf.keyidx : -1,
                                         (void *) skb->data, NULL, GFP_ATOMIC);
         return RX_DROP_UNUSABLE;
 }