linux-kernel - RE: [Question] kernfs: NULL pointer dereference in kernfs_dop

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Message-ID: <9ed26568de294a6892806df779908d4c@huawei.com>
Date:   Mon, 28 Mar 2022 15:23:43 +0000
From:   "Zhoujian (jay)" <jianjay.zhou@...wei.com>
To:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tj@...nel.org" <tj@...nel.org>,
        "Huangweidong (C)" <weidong.huang@...wei.com>,
        "Wangjing(Hogan)" <hogan.wang@...wei.com>
Subject: RE: [Question] kernfs: NULL pointer dereference in
 kernfs_dop_revalidate()

> -----Original Message-----
> From: gregkh@...uxfoundation.org [mailto:gregkh@...uxfoundation.org]
> Sent: Monday, March 28, 2022 8:20 PM
> To: Zhoujian (jay) <jianjay.zhou@...wei.com>
> Cc: linux-kernel@...r.kernel.org; tj@...nel.org; Huangweidong (C)
> <weidong.huang@...wei.com>; Wangjing(Hogan) <hogan.wang@...wei.com>
> Subject: Re: [Question] kernfs: NULL pointer dereference in
> kernfs_dop_revalidate()
> 
> On Mon, Mar 28, 2022 at 11:59:49AM +0000, Zhoujian (jay) wrote:
> > Hi,
> >
> > We met a kernel panic during boot the new kernel using kexec, the
> > kernel version is 4.18.0(with some our changes), here is the stack:
> 
> 4.18.0 is _VERY_ old and obsolete, sorry.  Can you duplicate this on 5.17?

Thanks for your reply, I'll have a try.