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authorXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>2013-08-05 12:59:19 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2013-08-07 15:57:33 +0200
commit027664216d37afe80101de91f73dfbaf6b36ee65 (patch)
treececa9fe0c20332082886962987d54ed3c3679ba5 /arch/x86/kvm
parent205befd9a5c701b56f569434045821f413f08f6d (diff)
downloadlinux-027664216d37afe80101de91f73dfbaf6b36ee65.tar.bz2
KVM: MMU: fix check the reserved bits on the gpte of L2
Current code always uses arch.mmu to check the reserved bits on guest gpte which is valid only for L1 guest, we should use arch.nested_mmu instead when we translate gva to gpa for the L2 guest Fix it by using @mmu instead since it is adapted to the current mmu mode automatically The bug can be triggered when nested npt is used and L1 guest and L2 guest use different mmu mode Reported-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/paging_tmpl.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 7769699d48a8..3a75828be29b 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -218,8 +218,7 @@ retry_walk:
if (unlikely(!is_present_gpte(pte)))
goto error;
- if (unlikely(is_rsvd_bits_set(&vcpu->arch.mmu, pte,
- walker->level))) {
+ if (unlikely(is_rsvd_bits_set(mmu, pte, walker->level))) {
errcode |= PFERR_RSVD_MASK | PFERR_PRESENT_MASK;
goto error;
}