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SubjectRe: [PATCH v2] KVM: x86/mmu: Check every prev_roots in __kvm_mmu_free_obsolete_roots()
On Mon, Jun 06, 2022, wrote:
> From: Shaoqin Huang <>
> When freeing obsolete previous roots, check prev_roots as intended, not
> the current root.
> Signed-off-by: Shaoqin Huang <>
> Fixes: 527d5cd7eece ("KVM: x86/mmu: Zap only obsolete roots if a root shadow page is zapped")

Because KVM patches aren't guaranteed to be backported without it (though it's
"only" v5.18 that's affected), this needs:


Reviewed-by: Sean Christopherson <>

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