linux-kernel - Re: [syzkaller] There is "lwtunnel_valid_encap_type" WARNING in 6.1-rc3 mainline kernel

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Date:   Mon, 7 Nov 2022 16:16:16 +0800
From:   Pengfei Xu <pengfei.xu@...el.com>
To:     Eyal Birger <eyal.birger@...il.com>
CC:     <linux-kernel@...r.kernel.org>, <heng.su@...el.com>
Subject: Re: [syzkaller] There is "lwtunnel_valid_encap_type" WARNING in
 6.1-rc3 mainline kernel

Hi Eyal,

On 2022-11-07 at 08:09:39 +0200, Eyal Birger wrote:
> Hi,
> 
> On Mon, Nov 7, 2022 at 5:27 AM Pengfei Xu <pengfei.xu@...el.com> wrote:
> >
> > Hi Birger and net expert,
> >
> > Greeting!
> >
> > There is "lwtunnel_valid_encap_type" WARNING in 6.1-rc3 mainline kernel in syzkaller test in guest:
> 
> <snip>
> 
> >
> > Bisect and found the first bad commit is 2c2493b9da9166478fe072e3054f8a5741dadb02.
> > "xfrm: lwtunnel: add lwtunnel support for xfrm interfaces in collect_md mode"
> > And revert this commit, this issue could not be reproduced.
> >
> > All bisect and test dmesg log, kconfig, repro.c and repro binary are in link:
> > https://github.com/xupengfe/syzkaller_logs/tree/main/221103_152117_lwtunnel_valid_encap_type
> >
> > Kconfig, repro.c are in attached.
> >
> > If you fix this issue, thanks to add the Reported tag.
> >
> > Resend the email due to previous large attachment.
> 
> Thanks for the report.
> 
> A fix was submitted to the IPsec tree:
> https://lore.kernel.org/netdev/Y0UwqMZQ6n+G%2F%2FaD@shredder/
> 
  Ah, thanks for your information of fixed patch, please ignore this email.

  Thanks!
  BR.

> Thanks,
> Eyal.