Re: [PATCH] block: loop: fix filesystem corruption in case of aio/dio

[Jens Axboe]

On 04/15/2016 04:51 AM, Ming Lei wrote:
> Starting from commit e36f620428(block: split bios to max possible length),
> block core starts to split bio in the middle of bvec.
>
> Unfortunately loop dio/aio doesn't consider this situation, and
> always treat 'iter.iov_offset' as zero. Then filesystem corruption
> is observed.
>
> This patch figures out the offset of the base bvevc via
> 'bio->bi_iter.bi_bvec_done' and fixes the issue by passing the offset
> to iov iterator.
>
> Fixes: e36f6204288088f (block: split bios to max possible length)
> Cc: Keith Busch <keith.busch@xxxxxxxxx>
> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx (4.5)
> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxxxxx>

Thanks Ming, queued up.

--
Jens Axboe