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authorFred Zhou <fred.zy@gmail.com>2013-09-24 10:33:01 +0800
committerJohannes Berg <johannes.berg@intel.com>2013-10-01 12:20:38 +0200
commit15e230abaaa5a79feb25d1ef29b380e8b63aea0c (patch)
tree6960ab6a712d09c7c95f39355833c93cf42369fa /net
parentf0823475d57a1ece4fe1eafb1aef5c4fa79361aa (diff)
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>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/util.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 3c8283b9b45a..1fb31f94bf89 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -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;