On 09/30/2009 08:58 AM, Jan Lübbe wrote:
Hi!
On Wed, 2009-08-26 at 13:29 +0300, Avi Kivity wrote:
From: Jan Kiszka<jan.kiszka@xxxxxxxxxxx>
So far unprivileged guest callers running in ring 3 can issue, e.g., MMU
hypercalls. Normally, such callers cannot provide any hand-crafted MMU
command structure as it has to be passed by its physical address, but
they can still crash the guest kernel by passing random addresses.
To close the hole, this patch considers hypercalls valid only if issued
from guest ring 0. This may still be relaxed on a per-hypercall base in
the future once required.
Does kvm-72 (used by Debian and Ubuntu in stable releases) have the
problem? If yes, would the approach in this fix also work there?
Probably yes to both.
--
error compiling committee.c: too many arguments to function
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