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

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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]>
This commit is contained in:
Evgeniy Polyakov 2007-11-06 03:08:09 -08:00 • committed by David S. Miller
commit 4f9f8311a0
1 changed files with 3 additions and 0 deletions
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3
net/sched/sch_teql.c
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@ -252,6 +252,9 @@ __teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res, struct net_device *
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->header_ops == NULL ||
skb->dst == NULL ||
skb->dst->neighbour == NULL)