mac80211: WEP extra head/tail room in ieee80211_send_auth

After skb allocation and call to ieee80211_wep_encrypt in ieee80211_send_auth
the flow fails with a warning in ieee80211_wep_add_iv on verification of
available head/tailroom needed for WEP_IV and WEP_ICV.

Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 6886601..a6cda52 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1096,11 +1096,12 @@ void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
        int err;
 
        /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
-       skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
+       skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
+                           24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
        if (!skb)
                return;
 
-       skb_reserve(skb, local->hw.extra_tx_headroom);
+       skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
 
        mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
        memset(mgmt, 0, 24 + 6);