netdev - [PATCH V6 2/9] IB/ipoib: Verify address handle validity on send

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Date:	Mon, 24 Sep 2007 17:30:56 +0200
From:	Moni Shoua <monis@...taire.com>
To:	Roland Dreier <rdreier@...co.com>, Jay Vosburgh <fubar@...ibm.com>
CC:	netdev@...r.kernel.org,
	OpenFabrics General <general@...ts.openfabrics.org>
Subject: [PATCH V6 2/9] IB/ipoib: Verify address handle validity on send

When the bonding device senses a carrier loss of its active slave it replaces
that slave with a new one. In between the times when the carrier of an IPoIB
device goes down and ipoib_neigh is destroyed, it is possible that the
bonding driver will send a packet on a new slave that uses an old ipoib_neigh.
This patch detects and prevents this from happenning.

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
---
 drivers/infiniband/ulp/ipoib/ipoib_main.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

Index: net-2.6/drivers/infiniband/ulp/ipoib/ipoib_main.c
===================================================================
--- net-2.6.orig/drivers/infiniband/ulp/ipoib/ipoib_main.c	2007-09-18 17:09:26.535874225 +0200
+++ net-2.6/drivers/infiniband/ulp/ipoib/ipoib_main.c	2007-09-18 17:10:22.375853147 +0200
@@ -686,9 +686,10 @@ static int ipoib_start_xmit(struct sk_bu
 				goto out;
 			}
 		} else if (neigh->ah) {
-			if (unlikely(memcmp(&neigh->dgid.raw,
+			if (unlikely((memcmp(&neigh->dgid.raw,
 					    skb->dst->neighbour->ha + 4,
-					    sizeof(union ib_gid)))) {
+					    sizeof(union ib_gid))) ||
+					 (neigh->dev != dev))) {
 				spin_lock(&priv->lock);
 				/*
 				 * It's safe to call ipoib_put_ah() inside

-
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