netdev - Re: [Patch net v3] tun: fix a memory leak for tfile->tx

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Message-ID: <30c120dd-d577-02ed-dcad-4827bde3beb3@redhat.com>
Date:   Tue, 16 Jan 2018 14:12:53 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [Patch net v3] tun: fix a memory leak for tfile->tx_array



On 2018年01月16日 14:07, Cong Wang wrote:
> On Mon, Jan 15, 2018 at 10:00 PM, Jason Wang <jasowang@...hat.com> wrote:
>> I mean we can leave __tun_detach() as is, and just add the cleanup to
>> tun_detach_all(). This is because in both cases, we're sure skb array has
>> been initialized before.
>>
> Oh, I thought the same before sending v3, but I believe it is easier to
> understand 'if (tfile->tx_array.ring.queue)' than 'if (tun)', because tx_array
> only depends on itself rather tfile->tun in this way.

Maybe just add a comment to explain in __tun_detach(), it avoids 
memset() anyway.

Thanks