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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] net: ICMPv6 packets transmitted on wrong interface if
 nfmark is mangled
Date: Mon, 03 Dec 2012 17:06:36 -0500 (EST)
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From: Dries De Winter <dries.dewinter@gmail.com>
Date: Mon, 3 Dec 2012 22:31:51 +0100

> 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.

Maybe this suggests that a better fix is to simply explicitly check
for protocol ICMPV6 in ip6_route_me_harder().