[PATCH] KVM: MMU: Ensure freed shadow pages are clean

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index c55ce7d..b9ba240 100644 (file)
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -318,6 +318,7 @@ static void kvm_mmu_free_page(struct kvm_vcpu *vcpu, hpa_t page_hpa)
 {
        struct kvm_mmu_page *page_head = page_header(page_hpa);
 
+       ASSERT(is_empty_shadow_page(page_hpa));
        list_del(&page_head->link);
        page_head->page_hpa = page_hpa;
        list_add(&page_head->link, &vcpu->free_pages);