Commit 3b80fffe authored by Izik Eidus's avatar Izik Eidus Committed by Avi Kivity
Browse files

KVM: MMU: make __kvm_mmu_free_some_pages handle empty list 



First check if the list is empty before attempting to look at list
entries.

Cc: stable@kernel.org
Signed-off-by: default avatarIzik Eidus <ieidus@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 95fb4eb6

arch/x86/kvm/mmu.c

+2 −1
Original line number Diff line number Diff line
@@ -2705,7 +2705,8 @@ EXPORT_SYMBOL_GPL(kvm_mmu_unprotect_page_virt); 


void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)

{

	while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES) {

	while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES &&

	       !list_empty(&vcpu->kvm->arch.active_mmu_pages)) {

		struct kvm_mmu_page *sp;



		sp = container_of(vcpu->kvm->arch.active_mmu_pages.prev,