APPLIED[R/N]: [SRU][S:linux/R:linux/N:linux][PATCH 0/1] Malformed HV_LINUX_VENDOR_ID breaks VM Availability Metric on Azure Edit

[Edoardo Canepa]

Applied to R/N:linux/master-next. Thanks.

On 6/26/26 19:55, Vinicius Peixoto via kernel-team wrote:
> BugLink: https://bugs.launchpad.net/bugs/2158462
>
> [Impact]
>
> Commit 56f727d2cc7a ("UBUNTU: SAUCE: (no-up) hv: Supply vendor ID and package ABI") introduced a regression that breaks the VM Availability Metric functionality on Azure due to a malformed HV_LINUX_VENDOR_ID being reported to Hyper-V. This impacts customers that rely on that metric to assess if their VMs are in a healthy state or not.
>
> [Fix]
>
> The HV_LINUX_VENDOR_ID should be 0x8180 rather than 0x80; this issue can be fixed by adjusting the value of the constant in all generic kernels affected by this.
>
> [Test Plan]
>
> Compile and boot tested; verified that the metric works on an Azure VM running a kernel with the fix. Microsoft is to perform validation on their side as well.
>
> [Regression Potential]
>
> Low regression potential, but could impact the identification of Ubuntu guests on Azure.
>
> [Other Info]
>
> SF: #00439544
>
> Vinicius Peixoto (1):
>    UBUNTU: SAUCE: (no-up) hv: Fix supplied vendor ID
>
>   include/hyperv/hvgdk.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
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