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Date:   Sun, 14 Aug 2022 19:29:18 -0600
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Subject: Re: upstream kernel crashes
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To:     Guenter Roeck <linux@roeck-us.net>,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Andres Freund <andres@anarazel.de>,
        James Bottomley <James.Bottomley@hansenpartnership.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        linux-kernel@vger.kernel.org, Greg KH <gregkh@linuxfoundation.org>
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 <20220815011718.GA3694888@roeck-us.net>
From:   Jens Axboe <axboe@kernel.dk>
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On 8/14/22 7:17 PM, Guenter Roeck wrote:
> On Sun, Aug 14, 2022 at 03:47:44PM -0700, Linus Torvalds wrote:
>> On Sun, Aug 14, 2022 at 3:37 PM Andres Freund <andres@anarazel.de> wrote:
>>>
>>> That range had different symptoms, I think (networking not working, but not
>>> oopsing). I hit similar issues when tried to reproduce the issue
>>> interactively, to produce more details, and unwisely did git pull instead of
>>> checking out the precise revision, ending up with aea23e7c464b. That's when
>>> symptoms look similar to the above.  So it'd be 69dac8e431af..aea23e7c464b
>>> that I'd be more suspicious off in the context of this thread.
>>
>> Ok.
>>
>>> Which would make me look at the following first:
>>> e140f731f980 Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
>>> abe7a481aac9 Merge tag 'block-6.0-2022-08-12' of git://git.kernel.dk/linux-block
>>> 1da8cf961bb1 Merge tag 'io_uring-6.0-2022-08-13' of git://git.kernel.dk/linux-block
>>
>> All right, that maks sense.The reported oopses seem to be about block
>> requests. Some of them were scsi in particular.
>>
>> Let's bring in Jens and the SCSI people. Maybe that host reference
>> counting? There's quite a lot of "move freeing around" in that late
>> scsi pull, even if it was touted as "mostly small bug fixes and
>> trivial updates".
>>
> 
> I may be wrong, but I don't think it is SCSI. The crashes are all over the
> place. Here is another one that just came in. I can dig up more tomorrow.

I guess it could be generic, I was mostly reacting to the three pull
requests listed. I haven't seen this on any of my test boxes, but I
guess it could depend on the configured kernel options.

-- 
Jens Axboe