netdev - Re: [PATCHv2 iproute2] utils: return default family when rtm_family is not RTNL_FAMILY

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Message-ID: <20170727100302.GP2235@orbyte.nwl.cc>
Date:   Thu, 27 Jul 2017 12:03:02 +0200
From:   Phil Sutter <phil@....cc>
To:     Hangbin Liu <liuhangbin@...il.com>
Cc:     netdev@...r.kernel.org,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: Re: [PATCHv2 iproute2] utils: return default family when rtm_family
 is not RTNL_FAMILY_IPMR/IP6MR

On Thu, Jul 27, 2017 at 05:44:15PM +0800, Hangbin Liu wrote:
> When we get a multicast route, the rtm_type is RTN_MULTICAST, but the
> rtm_family may be AF_INET. If we only check the type with RTNL_FAMILY_IPMR,
> we will get malformed address. e.g.
> 
> + ip -4 route add multicast 172.111.1.1 dev em1 table main
> 
> Before fix:
> + ip route list type multicast table main
> multicast ac6f:101:800:400:400:0:3c00:0 dev em1 scope link
> 
> After fix:
> + ip route list type multicast table main
> multicast 172.111.1.1 dev em1 scope link
> 
> Fixes: 56e3eb4c3400 ("ip: route: fix multicast route dumps")
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>

Acked-by: Phil Sutter <phil@....cc>