linux-kernel - Re: [PATCH net v3] net: ravb: Fix possible UAF bug in ravb

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Message-ID: <CAJedcCydqmVBrNq_RCDF2gRds39XqWORFi32MV+9LGa5p28dPQ@mail.gmail.com>
Date:   Sun, 16 Jul 2023 11:14:40 +0800
From:   Zheng Hacker <hackerzheng666@...il.com>
To:     Sergey Shtylyov <s.shtylyov@....ru>
Cc:     Lee Jones <lee@...nel.org>, Jakub Kicinski <kuba@...nel.org>,
        Zheng Wang <zyytlz.wz@....com>, davem@...emloft.net,
        linyunsheng@...wei.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: ravb: Fix possible UAF bug in ravb_remove

Hello,

After reviewing the code, I think it's better to put the code in
ravb_remove. For the ravb_remove is bound with the device and
ravb_close is bound with the file. We may not call ravb_close if
there's no file opened.

Thanks,
Zheng

Zheng Hacker <hackerzheng666@...il.com> 于2023年7月16日周日 10:11写道：
>
> Hello,
>
> This bug is found by static analysis. I'm sorry that my friends apply
> for a CVE number before we really fix it. We made a list about the
> bugs we have submitted and wouldn't disclose them before the fix. But
> we had a inconsistent situation last month. And we applied it by
> mistake foe we thought we had fixed it. And so sorry about my late
> reply, I'll see the patch right now.
>
> Best regards,
> Zheng Wang
>
> Sergey Shtylyov <s.shtylyov@....ru> 于2023年7月16日周日 04:48写道：
> >
> > On 7/15/23 7:07 PM, Zheng Hacker wrote:
> >
> > > Sorry for my late reply. I'll see what I can do later.
> >
> >    That's good to hear!
> >    Because I'm now only able to look at it during weekends...
> >
> > > Lee Jones <lee@...nel.org> 于2023年7月12日周三 19:56写道：
> > >>
> > >> On Mon, 10 Jul 2023, Jakub Kicinski wrote:
> > >>
> > >>> On Mon, 10 Jul 2023 12:42:53 +0100 Lee Jones wrote:
> > >>>> For better or worse, it looks like this issue was assigned a CVE.
> > >>>
> > >>> Ugh, what a joke.
> > >>
> > >> I think that's putting it politely. :)
> > >>
> > >> --
> > >> Lee Jones [李琼斯]
> >
> > MBR, Sergey