netdev - Re : Re : Bug in using inet

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Date:	Wed, 14 Nov 2007 16:47:22 +0000 (GMT)
From:	Nj A <nj_a83@...oo.fr>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
Cc:	netdev@...r.kernel.org
Subject: Re : Re : Bug in using inet_lookup ()

By setting the ID of the ingress device to the inet_lookup() to 0, the machine reboots automatically.
Setting proc/sys/kernel/panic* to non zero values dosn't help more..

Cheers,

----- Message d'origine ----
> De : Evgeniy Polyakov <johnpol@....mipt.ru>
> À : Nj A <nj_a83@...oo.fr>
> Cc : netdev@...r.kernel.org
> Envoyé le : Mercredi, 14 Novembre 2007, 14h31mn 18s
> Objet : Re: Re : Bug in using inet_lookup ()
> 
> On Wed, Nov 14, 2007 at 01:12:11PM +0000, Nj A (nj_a83@...oo.fr) wrote:
> > I suspected it could be that. However, can't see in ip_rcv the right portion
> that can help.
> > Any further tip please?
> 
> It is ip_rcv_finish() called from ip_rcv():
> if (skb->dst == NULL) {
> int err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
> skb->dev);
> if (unlikely(err)) {
> if (err == -EHOSTUNREACH)
> IP_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
> else if (err == -ENETUNREACH)
> IP_INC_STATS_BH(IPSTATS_MIB_INNOROUTES);
> goto drop;
> }
> }
> 
> So you will have to specify device, you got your skb via.
> Actually it is not exactly needed in some cases, you will need interface
> index (dev->ifindex). You can find socket by using that number instead
> of dereferencing dst.
> 
> -- 
> Evgeniy
> Polyakov
>


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