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

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Message-ID: <fef5174d-2109-37e9-8c46-2626b3310c5e@huawei.com>
Date:   Thu, 13 Oct 2022 18:51:29 +0800
From:   shaozhengchao <shaozhengchao@...wei.com>
To:     netdev <netdev@...r.kernel.org>, Paolo Abeni <pabeni@...hat.com>
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: net/kcm: syz issue about general protection fault in skb_unlink

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?

Thank you.

Zhengchao Shao