Re: [PATCH v4 2/2] The ccp driver can be overloaded even with guest request rate limits. The return value of -EBUSY means that there is no firmware error to report back to user space, so the guest VM would see this as exitinfo2 = 0. The false success can trick the guest to update its message sequence number when it shouldn't have.

[Dionna Amalie Glaze <dionnaglaze@xxxxxxxxxx>]

On Wed, May 14, 2025 at 11:42 AM Dionna Glaze <dionnaglaze@xxxxxxxxxx> wrote:
>
> Instead, when ccp returns -EBUSY, that is reported to userspace as the
> throttling return value.
>

Ah, disregard this email. Globbed one too many patch files.


-- 
-Dionna Glaze, PhD, CISSP, CCSP (she/her)