From 29c3f9c3996abea060fa6e0b9e6a30d3f0cc828c Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 10 Sep 2014 13:39:55 +0300
Subject: mac80211: clear key material when freeing keys

When freeing the key, clear the memory to avoid having the
key material stick around in memory "forever".

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index f320a04..4712150 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -422,7 +422,7 @@ static void ieee80211_key_free_common(struct ieee80211_key *key)
 		ieee80211_aes_key_free(key->u.ccmp.tfm);
 	if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC)
 		ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm);
-	kfree(key);
+	kzfree(key);
 }
 
 static void __ieee80211_key_destroy(struct ieee80211_key *key,
-- 
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