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macsec: don't put a NULL rxsa

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The "deliver:" path of macsec_handle_frame can be called with
rx_sa == NULL.  Check rx_sa != NULL before calling macsec_rxsa_put().

Fixes: c09440f7dc ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2016-04-22 11:28:03 +02:00 committed by David S. Miller
parent c10c63ea73
commit 497f358aa4
1 changed files with 2 additions and 1 deletions
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3
drivers/net/macsec.c
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@ -1161,7 +1161,8 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb)
macsec_extra_len(macsec_skb_cb(skb)->has_sci));
macsec_reset_skb(skb, secy->netdev);
macsec_rxsa_put(rx_sa);
if (rx_sa)
macsec_rxsa_put(rx_sa);
count_rx(dev, skb->len);
rcu_read_unlock();