netdev - Re: [PATCH] net: ICMPv6 packets transmitted on wrong interface if nfmark is mangled

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Message-ID: <20121203235216.GA11723@1984>
Date:	Tue, 4 Dec 2012 00:52:16 +0100
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	Jan Engelhardt <jengelh@...i.de>
Cc:	Dries De Winter <dries.dewinter@...il.com>,
	David Miller <davem@...emloft.net>, kaber@...sh.net,
	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH] net: ICMPv6 packets transmitted on wrong interface if
 nfmark is mangled

On Tue, Dec 04, 2012 at 12:38:25AM +0100, Jan Engelhardt wrote:
> 
> On Monday 2012-12-03 22:31, Dries De Winter wrote:
> >
> >Not fixing this means that skb->mark is unavailable for use on ICMPv6
> >packets because it will inevitably put those packets on the wrong
> >interface. [...]
> >
> >I use skb->mark for QoS, not for routing so I don't expect
> >the outgoing interface to be affected by my markers.
> 
> Why would it do that, if one has no routes joined to a fwmark NNN
> routing rule?

iptables_mangle assumes that ip_route_me_harder needs to be called if
the mark has changed.
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