From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Wang <jasowang@redhat.com>
Subject: Re: [Patch net v3] tun: fix a memory leak for tfile->tx_array
Date: Tue, 16 Jan 2018 14:00:52 +0800
Message-ID: <16b82836-7e07-c13c-cd7b-917eaa06d224@redhat.com>
References: <20180115193729.13220-1-xiyou.wangcong@gmail.com>
 <3c47b1dd-f8ae-87a7-a498-467b9027dcbc@redhat.com>
 <CAM_iQpWKTZTpkfS3tmarNNN64wtPdSutZSzymy+1XnN24__NPA@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Cc: Linux Kernel Network Developers <netdev@vger.kernel.org>,
        Dmitry Vyukov <dvyukov@google.com>
To: Cong Wang <xiyou.wangcong@gmail.com>
Return-path: <netdev-owner@vger.kernel.org>
Received: from mx1.redhat.com ([209.132.183.28]:59570 "EHLO mx1.redhat.com"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1750822AbeAPGA4 (ORCPT <rfc822;netdev@vger.kernel.org>);
        Tue, 16 Jan 2018 01:00:56 -0500
In-Reply-To: <CAM_iQpWKTZTpkfS3tmarNNN64wtPdSutZSzymy+1XnN24__NPA@mail.gmail.com>
Content-Language: en-US
Sender: netdev-owner@vger.kernel.org
List-ID: <netdev.vger.kernel.org>



On 2018年01月16日 13:49, Cong Wang wrote:
> On Mon, Jan 15, 2018 at 9:46 PM, Jason Wang <jasowang@redhat.com> wrote:
>>
>> I think then you don't even need the memset trick since we are sure it has
>> been implemented?
> It doesn't look like sk_alloc() zero's the memory of tfile.

Typo, for "implemented" I mean "initialized".

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.

Thanks