ACK: [SRU OEM-6.0 0/3] CVE-2022-27672

[Cengiz Can]

On 08/08/2023 20:18, 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
Acked-by: Cengiz Can <cengiz.can at canonical.com>
>
>   .../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                            | 43 ++++++---
>   5 files changed, 133 insertions(+), 13 deletions(-)
>   create mode 100644 Documentation/admin-guide/hw-vuln/cross-thread-rsb.rst
>