ACK: [SRU][OEM-6.1/L/M][PATCH 0/1] CVE-2023-5090

[Stefan Bader]

On 25.10.23 22:08, Yuxuan Luo wrote:
> [Impact]
> Assuming that the guest's apic was in x2apic mode, reseting its apic
> will bring it back to the xapic mode. In this case, an erroneous check
> statement prevents an interception function from doing anything,
> exposing bare metal environment to the guest, leading to denial of
> service.
> 
> [Backport]
> For Mantic it is a clean cherry pick.
> For Lunar and Jammy-OEM-6.1, there is a refactoring commit f628a34a9d52
> ("KVM: SVM: Replace "avic_mode" enum with "x2avic_enabled" boolean")
> causing a conflict. Ignoring this refactoring and manually removing the
> erroneous check statement does the work.
> 
> [Test]
> Compile and boot tested.
> 
> [Potential Regression]
> Expect low regression potential limited in AMD users.
> 
> Maxim Levitsky (1):
>    x86: KVM: SVM: always update the x2avic msr interception
> 
>   arch/x86/kvm/svm/svm.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 

Acked-by: Stefan Bader <stefan.bader at canonical.com>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_0xE8675DEECBEECEA3.asc
Type: application/pgp-keys
Size: 44613 bytes
Desc: OpenPGP public key
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20231027/ff34de58/attachment-0001.key>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20231027/ff34de58/attachment-0001.sig>