linux-kernel - [PATCH 4.7 12/41] macsec: ensure rx_sa is set when validation is disabled

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Message-Id: <20160814202532.690363908@linuxfoundation.org>
Date:	Sun, 14 Aug 2016 22:38:38 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Beniamino Galvani <bgalvani@...hat.com>,
	Sabrina Dubroca <sd@...asysnail.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.7 12/41] macsec: ensure rx_sa is set when validation is disabled

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

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

From: Beniamino Galvani <bgalvani@...hat.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 <bgalvani@...hat.com>
Acked-by: Sabrina Dubroca <sd@...asysnail.net>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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)