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Date:	Thu, 06 Feb 2014 10:37:07 +0100
From:	Nicolas Dichtel <>
To:	Francois-Xavier Le Bail <>,
CC:	David Stevens <>,
	Bill Fink <>,
	Hannes Frederic Sowa <>,
	"David S. Miller" <>,
	Alexey Kuznetsov <>,
	James Morris <>,
	Hideaki Yoshifuji <>,
	Patrick McHardy <>
Subject: Re: [PATCH net-next v2] ipv6: enable anycast addresses as source
 addresses in ICMPv6 error messages

Le 19/01/2014 17:00, Francois-Xavier Le Bail a écrit :
> - Uses ipv6_anycast_destination() in icmp6_send().
> Suggested-by: Bill Fink <>
> Signed-off-by: Francois-Xavier Le Bail <>
This patch causes an Oops on my target.

Here is the step to reproduce it:
modprobe sit
ip link add sit1 type sit remote local
ip l s sit1 up
ip -6 a a dev sit1 2001:1234::123 remote 2001:1234::121
ping6 2001:1234::121

The problem is that ipv6_anycast_destination() uses unconditionally
skb_dst(skb), which is NULL in this case.

Not sure what is the best way to fix this, any suggestions?

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