On Tue, 23 Apr 2024 12:31:14 -0700, Sean Christopherson wrote:
> Add full memory barriers in kvm_mmu_track_write() and account_shadowed()
> to plug a (very, very theoretical) race where kvm_mmu_track_write() could
> miss a 0->1 transition of indirect_shadow_pages and fail to zap relevant,
> *stale* SPTEs.
>
> Without the barriers, because modern x86 CPUs allow (per the SDM):
>
> [...]
Applied to kvm-x86 mmu.
[1/1] KVM: x86/mmu: Fix a largely theoretical race in kvm_mmu_track_write()
https://github.com/kvm-x86/linux/commit/226d9b8f1688
--
https://github.com/kvm-x86/linux/tree/next
