From: Avi Kivity <avi@qumranet.com>
Date: Sat, 6 Jan 2007 00:36:49 +0000 (-0800)
Subject: [PATCH] KVM: MMU: Ensure freed shadow pages are clean
X-Git-Tag: v2.6.20-rc4~35
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f1e0b6abcc100a79528387207adc3dd92aa5374;p=linux-2.6

[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 c55ce7d150..b9ba240144 100644
--- 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);