linux-kernel - Re: [Syzkaller] There is inet_csk_get

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Message-ID: <CAJnrk1ZvWfSAsYx-cErCqjQbciKCiAKss6Kvcm_4vXP5bzFh2g@mail.gmail.com>
Date:   Thu, 10 Nov 2022 10:37:36 -0800
From:   Joanne Koong <joannelkoong@...il.com>
To:     Pengfei Xu <pengfei.xu@...el.com>
Cc:     linux-kernel@...r.kernel.org, heng.su@...el.com
Subject: Re: [Syzkaller] There is inet_csk_get_port WARNING in v6.1-rc4 kernel

On Wed, Nov 9, 2022 at 7:38 PM Pengfei Xu <pengfei.xu@...el.com> wrote:
>
> Hi Joanne Koong and net developer,
>
> Greeting!
>
> Soft remind: "WARNING inet_csk_get_port" is found in v6.1-rc4 kernel.
>
> And first bad commit is: 28044fc1d4953b07acec0da4d2fc4784c57ea6fb
> "net: Add a bhash2 table hashed by port and address"
>
> Reproduce code from syzkaller, kconfig and bisect info are in attached.
> Full information is in the link:
> https://github.com/xupengfe/syzkaller_logs/tree/main/221108_215733_inet_csk_get_port
>
> Thanks!
> BR.

Thanks for your email. This has the same root cause (handling the
error case when connect() fails) as the issue discussed in this thread
https://lore.kernel.org/netdev/20221029001249.86337-1-kuniyu@amazon.com/.
After consensus is reached in this thread, I'll submit a follow-up
fix; I'm hoping to submit it by the end of next week at the latest.