Do not always dereference sta to get cipher scheme as it may be null for broadcast messages. Instead get IV length from key configuration which has been initialized with cipher scheme.
Signed-off-by: Cedric Izoard <[email protected]> --- net/mac80211/wpa.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index 75de6fa..ccf7997 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -780,9 +780,8 @@ ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx, struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_key *key = tx->key; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - const struct ieee80211_cipher_scheme *cs = key->sta->cipher_scheme; int hdrlen; - u8 *pos; + u8 *pos, iv_len = key->conf.iv_len; if (info->control.hw_key && !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) { @@ -790,14 +789,14 @@ ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx, return TX_CONTINUE; } - if (unlikely(skb_headroom(skb) < cs->hdr_len && - pskb_expand_head(skb, cs->hdr_len, 0, GFP_ATOMIC))) + if (unlikely(skb_headroom(skb) < iv_len && + pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC))) return TX_DROP; hdrlen = ieee80211_hdrlen(hdr->frame_control); - pos = skb_push(skb, cs->hdr_len); - memmove(pos, pos + cs->hdr_len, hdrlen); + pos = skb_push(skb, iv_len); + memmove(pos, pos + iv_len, hdrlen); return TX_CONTINUE; } @@ -1217,11 +1216,9 @@ ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx) if (!info->control.hw_key) return TX_DROP; - if (tx->key->sta->cipher_scheme) { - res = ieee80211_crypto_cs_encrypt(tx, skb); - if (res != TX_CONTINUE) - return res; - } + res = ieee80211_crypto_cs_encrypt(tx, skb); + if (res != TX_CONTINUE) + return res; } ieee80211_tx_set_protected(tx); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
