Re: [PATCH AUTOSEL 6.1 20/22] block: Allow bio_iov_iter_get_pages() with bio->bi_bdev unset

[Sasha Levin]

On Mon, Sep 11, 2023 at 07:15:18AM -0600, Jens Axboe wrote:
> On 9/11/23 3:54 AM, Pavel Machek wrote:
> > Hi!
> >
> > > 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.
> >
> > We are certainly not going to backport bcachefs to -stable. Please
> > drop.
>
> I already said as much 3 days ago:
>
> https://lore.kernel.org/all/cd341326-cfaf-4796-8894-2241e7b630d9@xxxxxxxxx/
>
> but didn't hear back yet.

Dropped, and sorry for lack of timely replies on this - I let them
collect feedback for a few weeks before going through it and dropping
what needs to be dropped.

--
Thanks,
Sasha