linux-kernel - Re: md raid6 oops in 6.6.4 stable

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Message-ID: <714b22c7-b8dd-008d-a1ea-a184dc8ec1cf@linux.dev>
Date:   Thu, 7 Dec 2023 22:42:44 +0800
From:   Guoqing Jiang <guoqing.jiang@...ux.dev>
To:     Genes Lists <lists@...ience.com>,
        Bagas Sanjaya <bagasdotme@...il.com>, snitzer@...nel.org,
        song@...nel.org, yukuai3@...wei.com, axboe@...nel.dk,
        mpatocka@...hat.com, heinzm@...hat.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux RAID <linux-raid@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>
Cc:     Bhanu Victor DiCara <00bvd0+linux@...il.com>,
        Xiao Ni <xni@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: md raid6 oops in 6.6.4 stable

Hi,

On 12/7/23 21:55, Genes Lists wrote:
> On 12/7/23 08:30, Bagas Sanjaya wrote:
>> On Thu, Dec 07, 2023 at 08:10:04AM -0500, Genes Lists wrote:
>>> I have not had chance to git bisect this but since it happened in 
>>> stable I
>>> thought it was important to share sooner than later.
>>>
>>> One possibly relevant commit between 6.6.3 and 6.6.4 could be:
>>>
>>>    commit 2c975b0b8b11f1ffb1ed538609e2c89d8abf800e
>>>    Author: Song Liu <song@...nel.org>
>>>    Date:   Fri Nov 17 15:56:30 2023 -0800
>>>
>>>      md: fix bi_status reporting in md_end_clone_io
>>>
>>> log attached shows page_fault_oops.
>>> Machine was up for 3 days before crash happened.

Could you decode the oops (I can't find it in lore for some reason) 
([1])? And
can it be reproduced reliably? If so, pls share the reproduce step.

[1]. https://lwn.net/Articles/592724/

Thanks,
Guoqing