Index: madwifi-ng-r2799-20071030/net80211/ieee80211_crypto_ccmp.c
===================================================================
--- madwifi-ng-r2799-20071030.orig/net80211/ieee80211_crypto_ccmp.c	2007-10-31 14:04:46.561274856 +0100
+++ madwifi-ng-r2799-20071030/net80211/ieee80211_crypto_ccmp.c	2007-10-31 14:04:49.913465886 +0100
@@ -475,6 +475,9 @@
 	uint8_t *mic, *pos;
 	u_int space;
 
+	if (ctx->cc_tfm == NULL)
+		return 0;
+
 	ctx->cc_vap->iv_stats.is_crypto_ccmp++;
 
 	skb = skb0;
@@ -589,6 +592,9 @@
 	uint8_t *pos, *mic;
 	u_int space;
 
+	if (ctx->cc_tfm == NULL)
+		return 0;
+
 	ctx->cc_vap->iv_stats.is_crypto_ccmp++;
 
 	skb = skb0;