netdev - Re: The ubufs->refcount maybe be subtracted twice when tun_get

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Date:   Wed, 30 Nov 2016 13:24:04 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     wangyunjian <wangyunjian@...wei.com>,
        "mst@...hat.com" <mst@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Cc:     caihe <caihe@...wei.com>
Subject: Re: The ubufs->refcount maybe be subtracted twice when tun_get_user
 failed



On 2016年11月30日 10:53, Jason Wang wrote:
>
>
> On 2016年11月29日 21:27, wangyunjian wrote:
>> Sorry, I didn't describe it clearly. In fact, the second subtraction 
>> happens in the function handle_tx,
>> when tun_get_user fails and zcopy_used is ture. Fllowing the steps:
>
> I get your meaning. Thanks for the reporting. Will post patches (since 
> macvtap has similar issue).

Posted, appreciate if you can have a test on them.

Thanks