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 f320a04380b9a22cc97b58dce8c9a162c501ec37..4712150dc2109df0b6f17162da8ec5119a94ec0a 100644 (file)
--- 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,