Commit fcd97ad5 authored by Peter Xu's avatar Peter Xu Committed by Paolo Bonzini
Browse files

KVM: Add build-time error check on kvm_run size 



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: default avatarPeter Xu <peterx@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent ef82eddc

virt/kvm/kvm_main.c

+1 −0
Original line number Diff line number Diff line
@@ -2710,6 +2710,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) 
		goto vcpu_decrement;

	}



	BUILD_BUG_ON(sizeof(struct kvm_run) > PAGE_SIZE);

	page = alloc_page(GFP_KERNEL | __GFP_ZERO);

	if (!page) {

		r = -ENOMEM;