Commit 15e230ab authored Sep 24, 2013 by Fred Zhou Committed by Johannes Berg Oct 01, 2013

mac80211: use exact-size allocation for authentication frame



The authentication frame has a fixied size of 30 bytes
(including header, algo num, trans seq num, and status)
followed by a variable challenge text.
Allocate using exact size, instead of over-allocation
by sizeof(ieee80211_mgmt).

Signed-off-by: Fred Zhou <fred.zy@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent f0823475

net/mac80211/util.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1081,8 +1081,8 @@ void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
		struct ieee80211_mgmt *mgmt;
		int err;

		skb = dev_alloc_skb(local->hw.extra_tx_headroom +
		sizeof(*mgmt) + 6 + extra_len);
		/* 24 + 6 = header + auth_algo + auth_transaction + status_code */
		skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
		if (!skb)
		return;