From 027664216d37afe80101de91f73dfbaf6b36ee65 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Mon, 5 Aug 2013 12:59:19 +0800 Subject: [PATCH] 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 Reviewed-by: Gleb Natapov Signed-off-by: Xiao Guangrong Signed-off-by: Paolo Bonzini --- arch/x86/kvm/paging_tmpl.h | 3 +-- 1 file changed, 1 insertion(+), 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 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker, 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; } -- GitLab