linux-kernel - Re: [Linux Kernel Bug] WARNING in remove_vm

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Message-ID: <CANn89iKkQ_zmdYwFLomcg4H2=4s8f1_2E8UbHhfd9KEPv=tu_Q@mail.gmail.com>
Date: Thu, 11 Sep 2025 09:33:43 -0700
From: Eric Dumazet <edumazet@...gle.com>
To: Jiaming Zhang <r772577952@...il.com>
Cc: kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	security@...nel.org, linux-kernel@...r.kernel.org, syzkaller@...glegroups.com
Subject: Re: [Linux Kernel Bug] WARNING in remove_vm_area

On Thu, Sep 11, 2025 at 9:29 AM Jiaming Zhang <r772577952@...il.com> wrote:
>
> Hello,
>
> Apologies for the oversight in my previous email. I neglected to
> include the formatted report.
>
> Please find the formatted report (formatted by syz-symbolize) attached
> to this email. This should be easier to read and analyze.
>
> Sorry for any inconvenience.
>
> Jiaming Zhang <r772577952@...il.com> 于2025年9月11日周四 21:59写道：
> >
> > Dear Linux kernel developers and maintainers:
> >
> > We are writing to report a kernel WARNING in remove_vm_area,
> > discovered with our modified version of syzkaller.
> >
> > This issue was initially found in kernel v6.17-rc5 (commit
> > 76eeb9b8de9880ca38696b2fb56ac45ac0a25c6c). Unfortunately, we do not
> > have a stable C or Syz program to reproduce this warning. We are
> > actively analyzing the root cause and working to create a reliable
> > reproducer, which we will share as soon as it is available.
> >
> > Attached are the kernel console output and the .config file for your
> > analysis. Please let us know if any further information would be
> > helpful.
> >
> > Best regards,
> > Jiaming Zhang

Please note that syzbot reports bcachefs bugs quite often, you do not
have to involve security@...nel.org,
especially if you send public reports to linux-kernel@...nel.org.

Thank you.