Messages in this thread Patch in this message | | | From | Peter Xu <> | Subject | [PATCH v3 04/21] KVM: Add build-time error check on kvm_run size | Date | Thu, 9 Jan 2020 09:57:12 -0500 |
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It's already going to reach 2400 Bytes (which is over half of page size on 4K page archs), so maybe it's good to have this build-time check in case it overflows when adding new fields.
Signed-off-by: Peter Xu <peterx@redhat.com> --- virt/kvm/kvm_main.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 24c9cf4c8a52..70b78ccaf3b5 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -338,6 +338,7 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) vcpu->pre_pcpu = -1; INIT_LIST_HEAD(&vcpu->blocked_vcpu_list); + BUILD_BUG_ON(sizeof(struct kvm_run) > PAGE_SIZE); page = alloc_page(GFP_KERNEL | __GFP_ZERO); if (!page) { r = -ENOMEM; -- 2.24.1
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