From: David Ahern <dsah...@gmail.com>
Date: Thu, 5 Apr 2018 08:40:48 -0600
> On 4/5/18 2:25 AM, Miguel Fadon Perlines wrote:
>> arp_filter performs an ip_route_output search for arp source address and
>> checks if output device is the same where the arp request was received,
>> if it is not, the arp request is not answered.
>>
>> This route lookup is always done on main route table so l3slave devices
>> never find the proper route and arp is not answered.
>>
>> Passing l3mdev_master_ifindex_rcu(dev) return value as oif fixes the
>> lookup for l3slave devices while maintaining same behavior for non
>> l3slave devices as this function returns 0 in that case.
>>
>> Signed-off-by: Miguel Fadon Perlines <mfa...@teldat.com>
>> ---
>> net/ipv4/arp.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>
> Acked-by: David Ahern <d...@cumulusnetworks.com>
>
> DaveM: this is a day 1 bug for VRF. Best guess at a Fixes tag would be:
>
> Fixes: 613d09b30f8b ("net: Use VRF device index for lookups on TX")
>
> It would be good to get this into stable releases 4.9 and up. Thanks,
Applied and queued up for -stable.
