4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Beniamino Galvani <bgalv...@redhat.com>

[ Upstream commit e3a3b626010a14fe067f163c2c43409d5afcd2a9 ]

macsec_decrypt() is not called when validation is disabled and so
macsec_skb_cb(skb)->rx_sa is not set; but it is used later in
macsec_post_decrypt(), ensure that it's always initialized.

Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Beniamino Galvani <bgalv...@redhat.com>
Acked-by: Sabrina Dubroca <s...@queasysnail.net>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/macsec.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -942,7 +942,6 @@ static struct sk_buff *macsec_decrypt(st
        }
 
        macsec_skb_cb(skb)->req = req;
-       macsec_skb_cb(skb)->rx_sa = rx_sa;
        skb->dev = dev;
        aead_request_set_callback(req, 0, macsec_decrypt_done, skb);
 
@@ -1169,6 +1168,8 @@ static rx_handler_result_t macsec_handle
                }
        }
 
+       macsec_skb_cb(skb)->rx_sa = rx_sa;
+
        /* Disabled && !changed text => skip validation */
        if (hdr->tci_an & MACSEC_TCI_C ||
            secy->validate_frames != MACSEC_VALIDATE_DISABLED)


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