Re: kernel BUG at block/bio.c:1787! while initializing scsi_debug on ppc64 host

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On Fri, Dec 11, 2015 at 07:53:40PM +0800, Eryu Guan wrote:
> Hi,
> 
> I saw this kernel BUG_ON on 4.4-rc4 kernel, and this can be reproduced
> easily on ppc64 host by:
> 
> modprobe scsi_debug sector_size=512 physblk_exp=3 dev_size_mb=256
> 
> And I bisected to this commit
> 
> 	commit ca369d51b3e1649be4a72addd6d6a168cfb3f537
> 	Author: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
> 	Date:   Fri Nov 13 16:46:48 2015 -0500
> 
> 	    block/sd: Fix device-imposed transfer length limits
> 
> I confirmed by reverting this commit on top of 4.4-rc4 kernel and test
> passed.

Hi,

Any updates on this? It's still reproducible with 4.4-rc8 kernel, and
still blocks some of my tests :)

Thanks,
Eryu
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