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

[Huang, Shaoqin]

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>