linux-kernel - Re: [PATCH net v3] net: ethernet: fix use after free bug in ns83820_remove

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Message-ID: <CAJedcCx3B58NaBHYZ_xurKjp=7DjmMgHvSta2axCu5ToQObwMg@mail.gmail.com>
Date:   Wed, 19 Apr 2023 13:30:05 +0800
From:   Zheng Hacker <hackerzheng666@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Zheng Wang <zyytlz.wz@....com>, davem@...emloft.net,
        horatiu.vultur@...rochip.com, edumazet@...gle.com,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, 1395428693sheep@...il.com,
        alex000young@...il.com
Subject: Re: [PATCH net v3] net: ethernet: fix use after free bug in
 ns83820_remove_one due to race condition

Jakub Kicinski <kuba@...nel.org> 于2023年4月19日周三 12:33写道：
>
> On Mon, 17 Apr 2023 09:31:07 +0800 Zheng Wang wrote:
> > +     netif_carrier_off(ndev);
> > +     netif_tx_disable(ndev);
> > +
> >       unregister_netdev(ndev
>
> It's not immediately obvious to me why disabling carrier and tx
> are supposed to help. Please elaborate in the commit message if
> you're confident that this is right.
>

Hi Jakub,

Thanks for your reply. I'll figure it out to see if it's really necessary.

Best regards,
Zheng

> --
> pw-bot: cr