ACK: [SRU][J][PATCH v2 0/1] CVE-2024-56721

[Kuba Pawlak]

On 1.04.2025 20:39, Kevin Becker wrote:
> https://ubuntu.com/security/CVE-2024-56721
>
> [ Impact ]
>
> x86/CPU/AMD: Terminate the erratum_1386_microcode array
>
> The erratum_1386_microcode array requires an empty entry at the end.
> Otherwise x86_match_cpu_with_stepping() will continue iterate the array
> after it ended. Add an empty entry to erratum_1386_microcode to its end.
>
> [ Fix ]
>
> Oracular:       fixed via stable updates
> Noble:          fixed via stable updates
> Jammy:          backport
> Focal:          not affected
> Bionic:         not affected
> Xenial:         not affected
>
> [ Test Plan ]
>
> * Build test for all supported architectures.
> * Boot tested on amd64 architecture.
>
> [ Where Problems Could Occur ]
>
> This patch affects AMD CPUs. However, the change is very minimal, so
> it should not cause a problem there is code that can't handle an
> empty entry in the erratum_1386_microcode array.
>
> Sebastian Andrzej Siewior (1):
>    x86/CPU/AMD: Terminate the erratum_1386_microcode array
>
>   arch/x86/kernel/cpu/amd.c | 1 +
>   1 file changed, 1 insertion(+)
>
Acked-by: Kuba Pawlak <kuba.pawlak at canonical.com>
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