GPF on 0xdead000000000100 in nvme_map_data - Linux 5.9.9

[Christoph Hellwig]

On Fri, Dec 04, 2020 at 12:08:47PM +0100, Marek Marczykowski-Górecki wrote:
> culprit: 
> 
> commit 9e2369c06c8a181478039258a4598c1ddd2cadfa
> Author: Roger Pau Monne <roger.pau at citrix.com>
> Date:   Tue Sep 1 10:33:26 2020 +0200
> 
>     xen: add helpers to allocate unpopulated memory
>     
> I'm adding relevant people and xen-devel to the thread.
> For completeness, here is the original crash message:

That commit definitively adds a new ZONE_DEVICE user, so it does look
related.  But you are not running on Xen, are you?