netdev - Re: kernel panic removing devices from a teql queuing discipline

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Message-Id: <20071030.013341.205362893.davem@davemloft.net>
Date:	Tue, 30 Oct 2007 01:33:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	cebbert@...hat.com
Cc:	netdev@...r.kernel.org
Subject: Re: kernel panic removing devices from a teql queuing discipline

From: Chuck Ebbert <cebbert@...hat.com>
Date: Mon, 29 Oct 2007 14:00:01 -0400

> The panic is in __teql_resolve (which has been inlined into teql_master_xmit) in
> net/sched/sch_teql.c at this line:
> 
> 	if (n && n->tbl == mn->tbl &&
> 
> Specifically the dereference of n->tbl is faulting as n is not valid.
> 
> And the address looks like part of an ASCCI string...  "figt"

I studied sch_teql.c a bit and I suspect that the slave list
management in teql_destroy() and teql_qdisc_init() might be
suspect.

If someone can take a closer look at this, I'd appreciate it.
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