Re: [PATCH AUTOSEL 6.5 31/36] block: Allow bio_iov_iter_get_pages() with bio->bi_bdev unset

[Jens Axboe]

On 9/8/23 1:28 PM, Sasha Levin wrote:
> From: Kent Overstreet <kent.overstreet@xxxxxxxxx>
> 
> [ Upstream commit 168145f617d57bf4e474901b7ffa869337a802e6 ]
> 
> bio_iov_iter_get_pages() trims the IO based on the block size of the
> block device the IO will be issued to.
> 
> However, bcachefs is a multi device filesystem; when we're creating the
> bio we don't yet know which block device the bio will be submitted to -
> we have to handle the alignment checks elsewhere.
> 
> Thus this is needed to avoid a null ptr deref.

Please drop this one from -stable, there's no need.

-- 
Jens Axboe