netdev - Re: WARNING in ip_rt

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Message-Id: <20180409.104340.1690774596565022032.davem@davemloft.net>
Date:   Mon, 09 Apr 2018 10:43:40 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     dvyukov@...gle.com
Cc:     syzbot+b09ac67a2af842b12eab@...kaller.appspotmail.com,
        kuznet@....inr.ac.ru, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        yoshfuji@...ux-ipv6.org, edumazet@...gle.com
Subject: Re: WARNING in ip_rt_bug

From: Dmitry Vyukov <dvyukov@...gle.com>
Date: Mon, 9 Apr 2018 08:06:20 +0200

> +Eric said that perhaps we just need to revert:
> 
> commit c378a9c019cf5e017d1ed24954b54fae7bebd2bc
> Date:   Sat May 21 07:16:42 2011 +0000
>     ipv4: Give backtrace in ip_rt_bug().

And I replied to him that we shouldn't.

Reverting makes the backtrace, and all the useful debugging
information, go away.  It won't fix the actual bug, which seems
to be that ICMP's route lookup tried to use an input route
for sending a packet.