Re: [PATCH] mm: fix dereference a null pointer in migrate[_huge]_page_move_mapping()

[李力琼]

Hi Gerg,

Sorry, i may understand your confusion.
I thought 'Upstream' as the newest code, so, I said 'Upstream has no this bug'.

Yes, we found this bug on 'Upstream v4.19.191'.

How could i submit this patch to 'longterm: 4.19'.

Thanks.

**

在 2022/2/17 下午3:59, 李力琼 写道:
> Hi Greg,
>
> Upstream replaces migrate_page_move_mapping() with 
> folio_migrate_mapping(),
> does not use radix tree any more. So, the upstream don't have the null
> pointer bug.
>
> We found and fix this bug on '4.19.191'.
>
> 在 2022/2/17 下午3:29, Greg KH 写道:
> > On Thu, Feb 17, 2022 at 02:38:08PM +0800, liqiong wrote:
> > > Upstream has no this bug.
> > What do you mean by this?
> >
> > confused,
> >
> > greg k-h