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Re: [Qemu-devel] [PATCH 1/3] xen: fix quad word bufioreq handling
From: |
Jan Beulich |
Subject: |
Re: [Qemu-devel] [PATCH 1/3] xen: fix quad word bufioreq handling |
Date: |
Wed, 23 Nov 2016 04:28:02 -0700 |
>>> 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
[Qemu-devel] [PATCH 2/3] xen: slightly simplify bufioreq handling, Jan Beulich, 2016/11/23
[Qemu-devel] [PATCH 3/3] xen: ignore direction in bufioreq handling, Jan Beulich, 2016/11/23