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Date:   Tue, 29 Aug 2023 14:46:16 +0100
From:   Lee Jones <lee@kernel.org>
To:     Zheng Wang <zyytlz.wz@163.com>
Cc:     s.shtylyov@omp.ru, linyunsheng@huawei.com, davem@davemloft.net,
        edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
        richardcochran@gmail.com, p.zabel@pengutronix.de,
        geert+renesas@glider.be, magnus.damm@gmail.com,
        yoshihiro.shimoda.uh@renesas.com, biju.das.jz@bp.renesas.com,
        wsa+renesas@sang-engineering.com, netdev@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
        hackerzheng666@gmail.com, 1395428693sheep@gmail.com,
        alex000young@gmail.com
Subject: Re: [PATCH v4] net: ravb: Fix possible UAF bug in ravb_remove
Message-ID: <20230829134616.GA215597@google.com>
References: <20230725030026.1664873-1-zyytlz.wz@163.com>
 <20230815100844.GA495519@google.com>
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On Tue, 15 Aug 2023, Lee Jones wrote:

> On Tue, 25 Jul 2023, Zheng Wang wrote:
> 
> > In ravb_probe, priv->work was bound with ravb_tx_timeout_work.
> > If timeout occurs, it will start the work. And if we call
> > ravb_remove without finishing the work, there may be a
> > use-after-free bug on ndev.
> > 
> > Fix it by finishing the job before cleanup in ravb_remove.
> > 
> > Note that this bug is found by static analysis, it might be
> > false positive.
> > 
> > Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
> > Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
> > Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
> > ---
> > v4:
> > - add information about the bug was found suggested by Yunsheng Lin
> > v3:
> > - fix typo in commit message
> > v2:
> > - stop dev_watchdog so that handle no more timeout work suggested by Yunsheng Lin,
> > add an empty line to make code clear suggested by Sergey Shtylyov
> > ---
> >  drivers/net/ethernet/renesas/ravb_main.c | 3 +++
> >  1 file changed, 3 insertions(+)
> 
> Trying my best not to sound like a broken record, but ...
> 
> What's the latest with this fix?  Is a v5 en route?

Any update please Zheng Wang?

-- 
Lee Jones [李琼斯]