Patch "xfrm: Fix xfrm_replay_overflow_offload_esn" has been added to the 4.15-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    xfrm: Fix xfrm_replay_overflow_offload_esn

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     xfrm-fix-xfrm_replay_overflow_offload_esn.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Fri Mar 16 15:11:07 CET 2018
From: Yossef Efraim <yossefe@mellanox.com>
Date: Tue, 28 Nov 2017 11:49:28 +0200
Subject: xfrm: Fix xfrm_replay_overflow_offload_esn

From: Yossef Efraim <yossefe@mellanox.com>


[ Upstream commit 0ba23a211360af7b6658e4fcfc571970bbbacc55 ]

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>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/xfrm/xfrm_replay.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -666,7 +666,7 @@ static int xfrm_replay_overflow_offload_
 		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_
 		}
 
 		replay_esn->oseq = oseq;
-		replay_esn->oseq_hi = oseq_hi;
 
 		if (xfrm_aevent_is_on(net))
 			x->repl->notify(x, XFRM_REPLAY_UPDATE);


Patches currently in stable-queue which might be from yossefe@mellanox.com are

queue-4.15/xfrm-fix-xfrm_replay_overflow_offload_esn.patch