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

[Jan Beulich]

>>> On 23.11.16 at 11:45, <address@hidden> 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.

Jan