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IB/ipoib: Verify address handle validity on send

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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>
Acked-by: Roland Dreier <rdreier@cisco.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Moni Shoua 2007-10-09 19:43:37 -07:00 committed by Jeff Garzik
parent 732a2170f4
commit 200d1713b4
1 changed files with 3 additions and 2 deletions
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5
drivers/infiniband/ulp/ipoib/ipoib_main.c
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@ -692,9 +692,10 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
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