From: Ben Greear <greearb@candelatech.com>
To: David Ahern <dsahern@gmail.com>, Cong Wang <xiyou.wangcong@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>, netdev <netdev@vger.kernel.org>
Subject: Re: Repeatable inet6_dump_fib crash in stock 4.12.0-rc4+
Date: Tue, 20 Jun 2017 07:12:27 -0700 [thread overview]
Message-ID: <09a00004-da54-dc8f-5806-9576bbf577c7@candelatech.com> (raw)
In-Reply-To: <8630b942-2684-2f21-fdb9-8474aba71528@gmail.com>
On 06/14/2017 03:25 PM, David Ahern wrote:
> On 6/14/17 4:23 PM, Ben Greear wrote:
>> On 06/13/2017 07:27 PM, David Ahern wrote:
>>
>>> Let's try a targeted debug patch. See attached
>>
>> I had to change it to pr_err so it would go to our serial console
>> since the system locked hard on crash,
>> and that appears to be enough to change the timing where we can no longer
>> reproduce the problem.
>
>
> ok, let's figure out which one is doing that. There are 3 debug
> statements. I suspect fib6_del_route is the one setting the state to
> FWS_U. Can you remove the debug prints in fib6_repair_tree and
> fib6_walk_continue and try again?
We cannot reproduce with just that one printf in the kernel either. It
must change the timing too much to trigger the bug.
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
next prev parent reply other threads:[~2017-06-20 14:12 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-06 21:06 Repeatable inet6_dump_fib crash in stock 4.12.0-rc4+ Ben Greear
2017-06-07 0:00 ` David Ahern
2017-06-07 0:27 ` Eric Dumazet
2017-06-07 0:34 ` David Ahern
2017-06-07 4:19 ` Eric Dumazet
2017-06-08 21:27 ` Ben Greear
2017-06-09 5:55 ` Cong Wang
2017-06-09 13:27 ` David Ahern
2017-06-09 21:25 ` Eric Dumazet
2017-06-13 20:16 ` Ben Greear
2017-06-13 20:28 ` David Ahern
2017-06-13 20:39 ` Ben Greear
2017-06-13 21:42 ` Cong Wang
2017-06-14 2:27 ` David Ahern
2017-06-14 22:23 ` Ben Greear
2017-06-14 22:25 ` David Ahern
2017-06-20 14:12 ` Ben Greear [this message]
2017-06-20 18:05 ` Michal Kubecek
2017-06-20 21:41 ` Ben Greear
2017-06-21 3:03 ` David Ahern
2017-06-25 21:59 ` David Ahern
2018-01-24 23:59 ` Ben Greear
2018-04-17 23:29 ` Ben Greear
2018-04-18 0:38 ` David Ahern
2017-06-07 0:48 ` Ben Greear
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