or if there are any plans
for addressing this case in future releases.
Since this issue can potentially cause a hypervisor panic, I believe it
would be valuable to handle this safely.
Thank you for your time
On Mon, Nov 13, 2023 at 4:36 PM Reima ISHII wrote:
>
> Hi Xen Development Tea
6, 2023 at 12:05 PM Reima ISHII
wrote:
> Thank you for your prompt response.
>
> On Tue, Dec 5, 2023 at 11:43 PM Andrew Cooper
> wrote:
> > Who is still in 64-bit mode ?
> >
> > It is legal for a 64-bit L1 to VMRUN into a 32-bit L2 with PG=0.
> >
> > But
larly considering Xen's current lack of AVIC support.
> But, is this by any chance all running nested under KVM in your fuzzer?
No, KVM was not used. The issue was observed on a Xen hypervisor's
domU HVM running directly on the hardware. Within the guest HVM, a
simple custom hypervisor was
)
(XEN)
(XEN) Panic on CPU 10:
(XEN) Xen BUG at arch/x86/hvm/svm/nestedsvm.c:983
(XEN)
(XEN)
--
Graduate School of Information Science and Technology, The University of Tokyo
Reima Ishii
ish...@g.ecc.u-tokyo.ac.jp
anic on CPU 2:
(XEN) Assertion 'vmcb->_vintr.fields.vgif == 0' failed at
arch/x86/hvm/svm/nestedsvm.c:799
(XEN)
Thanks,
--
Graduate School of Information Science and Technology, The University of Tokyo
Reima Ishii
ish...@g.ecc.u-tokyo.ac.jp
