ACK: [SRU Focal 0/3] CVE-2022-27672

[Andrei Gherzan]

On 23/06/21 05:22PM, Thadeu Lima de Souza Cascardo wrote:
> [Impact]
> A VM may force the CPU to go to idle and when it gets back from idle, it
> could leverage the RSB from a sibling thread to mount a speculative
> execution attack.
> 
> [Backport]
> Simple conflicts and the placement of setting mitigate_smt_rsb.
> 
> [Potential regression]
> It would affect VMs, specially when dealing with idleness.
> 
> Tom Lendacky (3):
>   x86/speculation: Identify processors vulnerable to SMT RSB predictions
>   KVM: x86: Mitigate the cross-thread return address predictions bug
>   Documentation/hw-vuln: Add documentation for Cross-Thread Return
>     Predictions
> 
>  .../admin-guide/hw-vuln/cross-thread-rsb.rst  | 92 +++++++++++++++++++
>  Documentation/admin-guide/hw-vuln/index.rst   |  1 +
>  arch/x86/include/asm/cpufeatures.h            |  1 +
>  arch/x86/kernel/cpu/common.c                  |  9 +-
>  arch/x86/kvm/x86.c                            | 44 ++++++---
>  5 files changed, 134 insertions(+), 13 deletions(-)
>  create mode 100644 Documentation/admin-guide/hw-vuln/cross-thread-rsb.rst

Acked-by: Andrei Gherzan <andrei.gherzan at canonical.com>

-- 
Andrei Gherzan
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20230626/17dbca3c/attachment.sig>