Re: [PATCH] ipv6: Preserve link scope traffic original oif

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On Fri, Mar 3, 2017 at 12:39 PM, Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> On Wed, Mar 01, 2017 at 02:47:23PM +0100, Alin Nastac wrote:
>> Link-local and multicast packets must keep their original oif after
>> ip6_route_me_harder is called.
>
> Out of curiosity, how does the setup you use look like to trigger this
> problem?

ICMPv6 RA/NS/NA are marked by a -j MARK iptables rule (the mark value
is used to set the QoS queue).
Because skb->mark value changed, ip6t_mangle_out will call ip6_route_me_harder.
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