[patch 08/26] Fix TEQL oops.

[Greg Kroah-Hartman]

2.6.22-stable review patch.  If anyone has any objections, please let us
know.

------------------
From: Evgeniy Polyakov <johnpol@xxxxxxxxxxx>

[PKT_SCHED]: Fix OOPS when removing devices from a teql queuing discipline

[ Upstream commit: 4f9f8311a08c0d95c70261264a2b47f2ae99683a ]

tecl_reset() is called from deactivate and qdisc is set to noop already,
but subsequent teql_xmit does not know about it and dereference private
data as teql qdisc and thus oopses.
not catch it first :)

Signed-off-by: Evgeniy Polyakov <johnpol@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 net/sched/sch_teql.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -263,6 +263,9 @@ __teql_resolve(struct sk_buff *skb, stru
 static __inline__ int
 teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res, struct net_device *dev)
 {
+	if (dev->qdisc == &noop_qdisc)
+		return -ENODEV;
+
 	if (dev->hard_header == NULL ||
 	    skb->dst == NULL ||
 	    skb->dst->neighbour == NULL)

-- 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/