netdev - Re: [PATCH nf v3 1/1] netfilter: snmp: Fix one possible panic when snmp_trap

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Date:   Fri, 24 Mar 2017 13:23:01 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     fgao@...ai8.com
Cc:     davem@...emloft.net, jolsa@...hat.com,
        netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
        gfree.wind@...il.com
Subject: Re: [PATCH nf v3 1/1] netfilter: snmp: Fix one possible panic when
 snmp_trap_helper fail to register

On Fri, Mar 24, 2017 at 01:21:30PM +0100, Pablo Neira Ayuso wrote:
> On Tue, Mar 21, 2017 at 08:22:29AM +0800, fgao@...ai8.com wrote:
> > From: Gao Feng <fgao@...ai8.com>
> > 
> > In the commit 93557f53e1fb ("netfilter: nf_conntrack: nf_conntrack snmp
> > helper"), the snmp_helper is replaced by nf_nat_snmp_hook. So the
> > snmp_helper is never registered. But it still tries to unregister the
> > snmp_helper, it could cause the panic.
> 
> This patch looks correct to me.
> 
> But probably for some reason I don't manage to trigger, how do you
> reproduce this?

I'm refering to the panic.