[dm-devel] [PATCH 05/10] block: do not reassig ->bi_bdev when partition remapping

[Jens Axboe]

On 1/25/21 11:21 AM, Christoph Hellwig wrote:
> On Mon, Jan 25, 2021 at 11:19:23AM -0700, Jens Axboe wrote:
>> On 1/25/21 11:18 AM, Christoph Hellwig wrote:
>>> On Mon, Jan 25, 2021 at 11:15:04AM -0700, Jens Axboe wrote:
>>>> On 1/25/21 11:13 AM, Christoph Hellwig wrote:
>>>>> On Mon, Jan 25, 2021 at 11:03:24AM -0700, Jens Axboe wrote:
>>>>>> Partition table entries are not in disk order.
>>>>>
>>>>> And the issue shows up with the series just up to the this patch,
>>>>> without any later patches?
>>>>
>>>> At that patch specifically. I bisected it, and then I double checked
>>>> by running the previous commit (boots fine), then apply this one, and
>>>> then I run into that error. So it should be 100% reliable.
>>>
>>> Ok, I have an idea.  With EOD message you mean this printk, right:
>>>
>>> 	pr_info_ratelimited("attempt to access beyond end of device\n"
>>>                             "%s: rw=%d, want=%llu, limit=%llu\n",
>>> 			    ...
>>>
>>> right?
>>
>> Yep
> 
> Can you give this untested patch a spin?  This should fix the
> case where we check the eod for the original partition with the
> remapped bi_sectors.  Looking into a local reproducer now.

Yep, with that applied on top my laptop boots again.

-- 
Jens Axboe