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Date: Mon, 5 Nov 2007 23:08:00 +0300 From: Evgeniy Polyakov <johnpol@....mipt.ru> To: David Miller <davem@...emloft.net> Cc: cebbert@...hat.com, netdev@...r.kernel.org Subject: Re: kernel panic removing devices from a teql queuing discipline On Tue, Oct 30, 2007 at 01:33:41AM -0700, David Miller (davem@...emloft.net) wrote: > > 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. n is never valid (null), mn is garbage. > > 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. 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. I will fix it tomorrow if you will not catch it first :) -- Evgeniy Polyakov - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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