2.6.22-stable review patch. If anyone has any objections, please let us
know.
------------------
From: Evgeniy Polyakov <[email protected]>
[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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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)
--
-
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