linux-kernel - Re: [PATCH v3 10/11] KVM: x86/MMU: Require reboot permission to disable NX hugepages

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Message-ID: <YkSbH3XR0YFzrZik@google.com>
Date:   Wed, 30 Mar 2022 18:02:07 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Ben Gardon <bgardon@...gle.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        David Dunn <daviddunn@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Junaid Shahid <junaids@...gle.com>
Subject: Re: [PATCH v3 10/11] KVM: x86/MMU: Require reboot permission to
 disable NX hugepages

On Wed, Mar 30, 2022, Ben Gardon wrote:
> Ensure that the userspace actor attempting to disable NX hugepages has
> permission to reboot the system. Since disabling NX hugepages would
> allow a guest to crash the system, it is similar to reboot permissions.

This patch needs to be squashed with the patch that introduces the capability,
otherwise you're introdcuing a bug and then fixing it in the same series.