netdev - Re: [PATCH net] ipv6: fix a dst leak when removing its exception

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Message-ID: <846bd1a6-c11a-7e87-d386-ad5d91595435@cumulusnetworks.com>
Date:   Mon, 19 Nov 2018 19:19:54 -0700
From:   David Ahern <dsa@...ulusnetworks.com>
To:     David Miller <davem@...emloft.net>, lucien.xin@...il.com
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv6: fix a dst leak when removing its exception

On 11/19/18 7:16 PM, David Miller wrote:
> From: Xin Long <lucien.xin@...il.com>
> Date: Thu, 15 Nov 2018 16:23:38 +0900
> 
>> The attachment is the ip6_dst.sh with IPVS.
>>
>> # sh ip6_dst.sh
> 
> Maybe a selftests candidate?
> 

That script was not a reliable reproducer for me.

I created a much simpler one that shows the problem every time - and
proves the change. It needs some adjustments to work as a selftest.
Specifically, it needs to check dmesg for net_device reference counts
after the rcu delay. I'll add to the to-do list.