mac80211: don't kmalloc 16 bytes
Since this small buffer isn't used for DMA, we can simply allocate it on the stack, it just needs to be 16 bytes of which only 8 will be used for WEP40 keys. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -222,7 +222,7 @@ static int ieee80211_wep_decrypt(struct ieee80211_local *local,
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struct ieee80211_key *key)
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{
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u32 klen;
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u8 *rc4key;
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u8 rc4key[3 + WLAN_KEY_LEN_WEP104];
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u8 keyidx;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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unsigned int hdrlen;
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@ -245,10 +245,6 @@ static int ieee80211_wep_decrypt(struct ieee80211_local *local,
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klen = 3 + key->conf.keylen;
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rc4key = kmalloc(klen, GFP_ATOMIC);
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if (!rc4key)
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return -1;
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/* Prepend 24-bit IV to RC4 key */
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memcpy(rc4key, skb->data + hdrlen, 3);
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@ -260,8 +256,6 @@ static int ieee80211_wep_decrypt(struct ieee80211_local *local,
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len))
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ret = -1;
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kfree(rc4key);
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/* Trim ICV */
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skb_trim(skb, skb->len - WEP_ICV_LEN);
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