Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   yossefe@mellanox.com
To:     "David S. Miller" <davem@davemloft.net>,
        Steffen Klassert <steffen.klassert@secunet.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     borisp@mellanox.com, kliteyn@mellanox.com, yossiku@mellanox.com,
        Yossef Efraim <yossefe@mellanox.com>
Subject: [PATCH net-next 1/3] xfrm: Fix xfrm_replay_overflow_offload_esn
Date:   Tue, 28 Nov 2017 11:49:28 +0200
Message-Id: <1511862571-3494-1-git-send-email-yossefe@mellanox.com>
MIME-Version: 1.0
Content-Type: text/plain
Received-SPF: None (protection.outlook.com: mellanox.com does not designate
 permitted sender hosts)
SpamDiagnosticOutput: 1:99
SpamDiagnosticMetadata: NSPM
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Nov 2017 09:49:41.2622
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: c41260e3-9825-47ae-e5e1-08d536455943
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: a652971c-7d2e-4d9b-a6a4-d149256f461b
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR0502MB3745
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

From: Yossef Efraim <yossefe@mellanox.com>

In case of wrap around, replay_esn->oseq_hi is not updated
before it is tested for it's actual value, leading function
to fail with overflow indication and packets being dropped.

This patch updates replay_esn->oseq_hi in the right place.

Fixes: d7dbefc45cf5 ("xfrm: Add xfrm_replay_overflow functions for offloading")
Signed-off-by: Yossef Efraim <yossefe@mellanox.com>
---
 net/xfrm/xfrm_replay.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index 8b23c5b..0250181 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -666,7 +666,7 @@ static int xfrm_replay_overflow_offload_esn(struct xfrm_state *x, struct sk_buff
 		if (unlikely(oseq < replay_esn->oseq)) {
 			XFRM_SKB_CB(skb)->seq.output.hi = ++oseq_hi;
 			xo->seq.hi = oseq_hi;
-
+			replay_esn->oseq_hi = oseq_hi;
 			if (replay_esn->oseq_hi == 0) {
 				replay_esn->oseq--;
 				replay_esn->oseq_hi--;
@@ -678,7 +678,6 @@ static int xfrm_replay_overflow_offload_esn(struct xfrm_state *x, struct sk_buff
 		}
 
 		replay_esn->oseq = oseq;
-		replay_esn->oseq_hi = oseq_hi;
 
 		if (xfrm_aevent_is_on(net))
 			x->repl->notify(x, XFRM_REPLAY_UPDATE);
-- 
2.8.1


From 1589374037213968239@xxx Fri Jan 12 08:19:58 +0000 2018
X-GM-THRID: 1585510570681691123
X-Gmail-Labels: Inbox,Category Forums,Downloaded_2018-01