linux-kernel - [PATCH 4.4 27/28] esp4: Fix integrity verification when ESN are used

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Message-Id: <20161209161749.098287018@linuxfoundation.org>
Date:   Fri,  9 Dec 2016 17:18:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tobias Brunner <tobias@...ongswan.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Steffen Klassert <steffen.klassert@...unet.com>
Subject: [PATCH 4.4 27/28] esp4: Fix integrity verification when ESN are used

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

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

From: Tobias Brunner <tobias@...ongswan.org>

commit 7c7fedd51c02f4418e8b2eed64bdab601f882aa4 upstream.

When handling inbound packets, the two halves of the sequence number
stored on the skb are already in network order.

Fixes: 7021b2e1cddd ("esp4: Switch to new AEAD interface")
Signed-off-by: Tobias Brunner <tobias@...ongswan.org>
Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/ipv4/esp4.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -476,7 +476,7 @@ static int esp_input(struct xfrm_state *
 		esph = (void *)skb_push(skb, 4);
 		*seqhi = esph->spi;
 		esph->spi = esph->seq_no;
-		esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.input.hi);
+		esph->seq_no = XFRM_SKB_CB(skb)->seq.input.hi;
 		aead_request_set_callback(req, 0, esp_input_done_esn, skb);
 	}