| commit | 86ef97b2dfd504fbc65f6b244a422db0c1b15797 | |
| author | Jim Mattson <jmattson@google.com> | |
| Tue, 12 Sep 2017 20:02:54 +0000 (12 13:02 -0700) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Thu, 5 Oct 2017 07:44:03 +0000 (5 09:44 +0200) | ||
| tree | 76d9c5e3514b9c968af808a075c3dc86a3826f16 | treesnapshot (tar.gz zip) |
| parent | 3d4213fac7d10e72859112c9100d8015ce442a3a | commitdiff |
kvm: nVMX: Don't allow L2 to access the hardware CR8
commit 51aa68e7d57e3217192d88ce90fd5b8ef29ec94f upstream.
If L1 does not specify the "use TPR shadow" VM-execution control in
vmcs12, then L0 must specify the "CR8-load exiting" and "CR8-store
exiting" VM-execution controls in vmcs02. Failure to do so will give
the L2 VM unrestricted read/write access to the hardware CR8.
This fixes CVE-2017-12154.
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 51aa68e7d57e3217192d88ce90fd5b8ef29ec94f upstream.
If L1 does not specify the "use TPR shadow" VM-execution control in
vmcs12, then L0 must specify the "CR8-load exiting" and "CR8-store
exiting" VM-execution controls in vmcs02. Failure to do so will give
the L2 VM unrestricted read/write access to the hardware CR8.
This fixes CVE-2017-12154.
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| arch/x86/kvm/vmx.c | diffblobblamehistory |