From: Wei Yongjun <yjwei@cn.fujitsu.com>
To: Avi Kivity <avi@redhat.com>
Cc: kvm@vger.kernel.org
Subject: [PATCH RESEND] KVM: PPC: fix leakage of error page in kvmppc_patch_dcbz()
Date: Tue, 17 Aug 2010 10:08:52 +0800 [thread overview]
Message-ID: <4C69EF34.5090706@cn.fujitsu.com> (raw)
Add kvm_release_page_clean() after is_error_page() to avoid
leakage of error page.
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 eee97b5..7656b6d 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -455,8 +455,10 @@ 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
next reply other threads:[~2010-08-17 2:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-17 2:08 Wei Yongjun [this message]
2010-08-17 9:05 ` [PATCH RESEND] KVM: PPC: fix leakage of error page in kvmppc_patch_dcbz() Avi Kivity
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