netdev - Re: net/kcm: syz issue about general protection fault in skb

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Message-ID: <d5cc5d48-5ab3-3697-fbcd-607eb5855ddc@huawei.com>
Date:   Thu, 13 Oct 2022 19:27:51 +0800
From:   shaozhengchao <shaozhengchao@...wei.com>
To:     Paolo Abeni <pabeni@...hat.com>, netdev <netdev@...r.kernel.org>
CC:     Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...emloft.net>, <edumazet@...gle.com>,
        <sgarzare@...hat.com>, <ast@...nel.org>, <nikolay@...dia.com>,
        <mkl@...gutronix.de>, <cong.wang@...edance.com>
Subject: Re: net/kcm: syz issue about general protection fault in skb_unlink



On 2022/10/13 19:13, Paolo Abeni wrote:
> On Thu, 2022-10-13 at 18:51 +0800, shaozhengchao wrote:
>> I found that the syz issue("general protection fault in skb_unlink")
>> still happen in Linux -next branch.
>> commit: 082fce125e57cff60687181c97f3a8ee620c38f5
>> Link:
>> https://groups.google.com/g/syzkaller-bugs/c/ZfR2B5KaQrA/m/QfnGHCYSBwAJ
>> Please ask:
>> Is there any problem with this patch? Why is this patch not merged into
>> the Linux -next branch or mainline?
> 
> I never submitted the patch formally. So much time has passed that I
> don't recall exactly why. Possibly the patch fell outside my radar
> after hitting a syzkaller infrastructure issue.
> 
> Apart from that, the patch is quite invasinve, especially for a
> subsystem with no selftest and that I don't know particularly well.
> 
> As a possible option I can try to post it for net-next, when it will
> re-open - assuming there is agreement on that.
> 
> Cheers,
> 
> Paolo
> 
> 
Hi Paolo:
	Thank you for your reply. I'd like to see your patch.:)
If needed, I can provide a reproduction program.

Zhengchao Shao