netdev - Re: Bug in FIB insert

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Message-ID: <5aebf4d1-9da1-a970-71d7-98b5cc7d77fa@gmail.com>
Date:   Fri, 17 Aug 2018 19:21:03 -0600
From:   David Ahern <dsahern@...il.com>
To:     "Md. Islam" <mislam4@...t.edu>, kuznet@....inr.ac.ru,
        David Miller <davem@...emloft.net>,
        Netdev <netdev@...r.kernel.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>
Subject: Re: Bug in FIB insert

On 8/16/18 6:59 PM, Md. Islam wrote:
> There is a bug in fib_table_insert(). If I add following routes,
> 
> 23.20.0.0/14 <http://23.20.0.0/14>    veth1
> 23.20.0.0/15 <http://23.20.0.0/15>    veth2
> 
> FIB lookup on 23.22.111.212  results veth1, not veth2.
> 

veth1 is the correct lookup response. '22' toggles the 15th bit which
means the compare to 23.20/15 fails.