From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ido Schimmel <idosch@mellanox.com>
Subject: Re: [PATCH net] mlxsw: spectrum_router: do not drop refcnt on fib
 rule
Date: Thu, 13 Jul 2017 23:33:58 +0300
Message-ID: <20170713203358.GA8349@splinter>
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To: David Ahern <dsahern@gmail.com>
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On Thu, Jul 13, 2017 at 01:46:15PM -0600, David Ahern wrote:
> On 7/13/17 1:11 PM, David Ahern wrote:
> > Since mlxsw is not doing a get on the rule to increase the ref count, it
> > should not be doing a put.
> 
> upon further review, mlxsw is doing a get on the rule
> 
> Problem remains, but this is not the right fix.

Remains where? It's not clear to me how you concluded mlxsw is at fault.
My setup is running net-next with the refcount patches and I didn't
observe this.

If current trace isn't enough to pinpoint the problem, can you try to
reproduce with a KASAN enabled kernel?