netdev - Re: [PATCH net] udp: fix SO

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Date:   Thu, 10 May 2018 15:43:23 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     pabeni@...hat.com
Cc:     netdev@...r.kernel.org, dnman@...etlabs.ru, dsahern@...il.com
Subject: Re: [PATCH net] udp: fix SO_BINDTODEVICE

From: Paolo Abeni <pabeni@...hat.com>
Date: Wed,  9 May 2018 12:42:34 +0200

> Damir reported a breakage of SO_BINDTODEVICE for UDP sockets.
> In absence of VRF devices, after commit fb74c27735f0 ("net:
> ipv4: add second dif to udp socket lookups") the dif mismatch
> isn't fatal anymore for UDP socket lookup with non null
> sk_bound_dev_if, breaking SO_BINDTODEVICE semantics.
> 
> This changeset addresses the issue making the dif match mandatory
> again in the above scenario.
> 
> Reported-by: Damir Mansurov <dnman@...etlabs.ru>
> Fixes: fb74c27735f0 ("net: ipv4: add second dif to udp socket lookups")
> Fixes: 1801b570dd2a ("net: ipv6: add second dif to udp socket lookups")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Applied.