[PATCH] KVM: PPC: fix leakage of page release in kvmppc_patch_dcbz()

Wei Yongjun
2010-07-15T01:37:47Z

Add kvm_release_page_clean() after is_error_page() to avoid
leakage of error page. No test.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
---
arch/powerpc/kvm/book3s.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index a3cef30..5baa3ab 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -415,8 +415,10 @@ static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
int i;

hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
- if (is_error_page(hpage))
+ if (is_error_page(hpage)) {
+ kvm_release_page_clean(hpage);
return;
+ }

hpage_offset = pte->raddr & ~PAGE_MASK;
hpage_offset &= ~0xFFFULL;
--
1.7.0.4