From fa1de2bfc0feb7245328ad25fb3e6d5cd2c903b4 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Fri, 16 Jul 2010 11:19:51 +0800 Subject: KVM: MMU: add missing reserved bits check in speculative path In the speculative path, we should check guest pte's reserved bits just as the real processor does Reported-by: Marcelo Tosatti Signed-off-by: Xiao Guangrong Signed-off-by: Avi Kivity --- arch/x86/kvm/paging_tmpl.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/x86/kvm/paging_tmpl.h') diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index d9a2742..51ef909 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -638,8 +638,9 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, return -EINVAL; gfn = gpte_to_gfn(gpte); - if (gfn != sp->gfns[i] || - !is_present_gpte(gpte) || !(gpte & PT_ACCESSED_MASK)) { + if (is_rsvd_bits_set(vcpu, gpte, PT_PAGE_TABLE_LEVEL) + || gfn != sp->gfns[i] || !is_present_gpte(gpte) + || !(gpte & PT_ACCESSED_MASK)) { u64 nonpresent; if (is_present_gpte(gpte) || !clear_unsync) -- cgit v1.1