Re: [Qemu-devel] [PATCH] audio/hda: fix guest triggerable assert

[Gerd Hoffmann]

On Thu, Nov 22, 2018 at 03:52:12PM +0000, Dr. David Alan Gilbert wrote:
> * Gerd Hoffmann (address@hidden) wrote:
> > Guest writes to a readonly register trigger the assert in
> > intel_hda_reg_write().  Add a check and just ignore them.
> > 
> > Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1628433
> > Signed-off-by: Gerd Hoffmann <address@hidden>
> 
> Does make you wonder:
>   a) Why the guest was writing to a read-only register
>   b) Wth it only did it in the weird combination of
>      devices tested.

Note that we also have pci hotplug involved.  Probably a bug in the
guest, maybe due to a register access landing at the wrong device while
reshuffling the bars or something like that.

cheers,
  Gerd