Re: [Xen-devel] [PATCH 1/3] xen: fix quad word bufioreq handling

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 23 Nov 2016, Jan Beulich wrote:
> >>> On 23.11.16 at 11:45, <Paul.Durrant@xxxxxxxxxx> wrote:
> > No, if QEMU is using a default ioreq server (i.e. the legacy way of doing 
> > things) then it's vulnerable to the guest messing with the rings and I'd 
> > forgotten that migrated-in guests from old QEMUs also end up using the 
> > default 
> > server, so I guess this is a worthy checkt to make... although maybe it's 
> > best to just bail if the check fails, since it would indicate a malicious 
> > guest.
> 
> Okay, that's basically the TBD note I have in the patch; I'll wait for
> at least one of the qemu maintainers to voice their preference.
 
I think we should just print an error and destroy_hvm_domain(false) or
hw_error if the check fails.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel