On Fri, 28 Feb 2025 15:08:04 -0800, Sean Christopherson wrote:
> During the initial mprotect(RO) stage of mmu_stress_test, keep vCPUs
> spinning until all vCPUs have hit -EFAULT, i.e. until all vCPUs have tried
> to write to a read-only page. If a vCPU manages to complete an entire
> iteration of the loop without hitting a read-only page, *and* the vCPU
> observes mprotect_ro_done before starting a second iteration, then the
> vCPU will prematurely fall through to GUEST_SYNC(3) (on x86 and arm64) and
> get out of sequence.
>
> [...]
Applied to kvm-x86 fixes, with Fixes and Closes. Thanks!
[1/1] KVM: selftests: Ensure all vCPUs hit -EFAULT during initial RO stage
https://github.com/kvm-x86/linux/commit/d88ed5fb7c88
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https://github.com/kvm-x86/linux/tree/next
