linux-kernel - Re: [PATCH] KVM: MMU: Reset mmu->pkru

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Message-ID: <YXF+5JiP4pDh2/qW@google.com>
Date:   Thu, 21 Oct 2021 14:53:24 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Chenyi Qiang <chenyi.qiang@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: MMU: Reset mmu->pkru_mask to avoid stale data

On Thu, Oct 21, 2021, Chenyi Qiang wrote:
> When updating mmu->pkru_mask, the value can only be added but it isn't
> reset in advance. This will make mmu->pkru_mask keep the stale data.
> Fix this issue.
> 
> Fixes: commit 2d344105f57c ("KVM, pkeys: introduce pkru_mask to cache conditions")
> Signed-off-by: Chenyi Qiang <chenyi.qiang@...el.com>
> ---

Reviewed-by: Sean Christopherson <seanjc@...gle.com>