netdev - Re: [PATCH net-next v1] ip6: fix PMTU discovery when using /127 subnets

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Message-Id: <20170716.163704.1853816638083095709.davem@davemloft.net>
Date:   Sun, 16 Jul 2017 16:37:04 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     vincent@...nat.im
Cc:     kafai@...com, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH net-next v1] ip6: fix PMTU discovery when using /127
 subnets

From: Vincent Bernat <vincent@...nat.im>
Date: Sat, 15 Jul 2017 19:40:20 +0200

> The definition of an "anycast destination address" has been tweaked as a
> side-effect of commit 2647a9b07032 ("ipv6: Remove external dependency on
> rt6i_gateway and RTF_ANYCAST"). The first address of a point-to-point
> /127 subnet is now considered as an anycast address. This prevents
> ICMPv6 errors to be returned to a sender of such a subnet and breaks
> PMTU discovery.
 ...
> Fixes: 2647a9b07032 ("ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCAST")
> Signed-off-by: Vincent Bernat <vincent@...nat.im>

Applied.