Re: [PATCH v2] KVM: x86/mmu: Check every prev_roots in __kvm_mmu_free_obsolete_roots()

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Thanks Sean!

On 6/7/2022 12:56 AM, Sean Christopherson wrote:
On Mon, Jun 06, 2022, shaoqin.huang@xxxxxxxxx wrote:
From: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>

When freeing obsolete previous roots, check prev_roots as intended, not
the current root.

Signed-off-by: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
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:

   Cc: stable@xxxxxxxxxxxxxxx

Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>



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