netdev - Re: [PATCH net] ipv6: flush nd cache on IFF

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Message-Id: <20150729.230153.72255655678954107.davem@davemloft.net>
Date:	Wed, 29 Jul 2015 23:01:53 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, valas@...gle.com, willemb@...gle.com,
	mariofanelli@...gle.com, edumazet@...gle.com
Subject: Re: [PATCH net] ipv6: flush nd cache on IFF_NOARP change

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 29 Jul 2015 12:01:41 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> This patch is the IPv6 equivalent of commit
> 6c8b4e3ff81b ("arp: flush arp cache on IFF_NOARP change") 
> 
> Without it, we keep buggy neighbours in the cache, with destination
> MAC address equal to our own MAC address.
> 
> Tested:
>  tcpdump -i eth0 -s 0 ip6 -n -e &
>  ip link set dev eth0 arp off
>  ping6 remote   // sends buggy frames
>  ip link set dev eth0 arp on
>  ping6 remote   // should work once kernel is patched
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: Mario Fanelli <mariofanelli@...gle.com>

Applied, thanks Eric.
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