netdev - Re: [PATCH net v2] ipv4: reset rt_iif for recirculated mcast/bcast out pkts

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Message-ID: <ad55a4f7-aa10-0e23-f8c8-da4c10c41710@gmail.com>
Date:   Wed, 26 Jun 2019 11:28:40 -0600
From:   David Ahern <dsahern@...il.com>
To:     Stephen Suryaputra <ssuryaextr@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net v2] ipv4: reset rt_iif for recirculated mcast/bcast
 out pkts

On 6/26/19 12:21 AM, Stephen Suryaputra wrote:
> Multicast or broadcast egress packets have rt_iif set to the oif. These
> packets might be recirculated back as input and lookup to the raw
> sockets may fail because they are bound to the incoming interface
> (skb_iif). If rt_iif is not zero, during the lookup, inet_iif() function
> returns rt_iif instead of skb_iif. Hence, the lookup fails.
> 
> v2: Make it non vrf specific (David Ahern). Reword the changelog to
>     reflect it.
> Signed-off-by: Stephen Suryaputra <ssuryaextr@...il.com>
> ---
>  include/net/route.h  |  1 +
>  net/ipv4/ip_output.c | 12 ++++++++++++
>  net/ipv4/route.c     | 33 +++++++++++++++++++++++++++++++++
>  3 files changed, 46 insertions(+)

Reviewed-by: David Ahern <dsahern@...il.com>