linux-kernel - Re: Crash when copying from broken external hdd

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Message-ID: <CAAzz28j0kTWaqnyAXR-1ASmzqdyp5hjYx1WmRg3_CN62Bt577w@mail.gmail.com>
Date:	Sun, 30 Nov 2014 15:55:03 -0500
From:	Laurence Oberman <oberman.l@...il.com>
To:	Richard Weinberger <richard@....at>
Cc:	Simon Danner <danner.simon@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	Jens Axboe <axboe@...nel.dk>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: Crash when copying from broken external hdd

The BUG_ON is taken because
blk_queued_rq(req)) returns true which means the request->queuelist is
empty, i.e no more entries by the time the request is dereferenced

Can I get the messages file entries (last 100 lines) just prior to the
panic, not the whole file.
If its large attach  .gz and email to me.

Thanks

On Sun, Nov 30, 2014 at 11:42 AM, Richard Weinberger <richard@....at> wrote:
> Am 30.11.2014 um 17:36 schrieb Simon Danner:
>> Hi,
>> here the two screenshots i could take, from 3.17.4 and 3.18 git.
>
> You're hitting BUG_ON(blk_queued_rq(req)); in blk_finish_request()
>
> Thanks,
> //richard
>
>> Thanks
>> Simon
>>
>> On Sun, 2014-11-30 at 10:58 -0500, Laurence Oberman wrote:
>>> I need more of the stack if you have it, the screenshot is not attached.
>>> Thanks
>>> Laurence
>>>
>>> On Sun, Nov 30, 2014 at 6:11 AM, Richard Weinberger
>>> <richard.weinberger@...il.com> wrote:
>>>> On Sat, Nov 29, 2014 at 11:52 AM, Simon Danner <danner.simon@...il.com> wrote:
>>>>> Hello,
>>>>> i get the following crash after i try to copy files from a broken
>>>>> external hdd to another external hdd.
>>>>> It happens after a few minutes, with latest git and 3.17.4 from Arch.
>>>>> Attached screenshot is from latest mainline git.
>>>>>
>>>>> i hope this can be fixed somehow,
>>>>> Regards Simon Danner
>>>>
>>>> Can you decode scsi_requed_end+0x122?
>>>> CC'ing block and scsi folks.
>>>>
>>>> --
>>>> Thanks,
>>>> //richard
>>>> --
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