[PATCH] KVM: x86/mmu: Check every prev_roots in __kvm_mmu_free_obsolete_roots()

[shaoqin.huang@xxxxxxxxx]

From: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>

Iterate every prev_roots and only zap obsoleted roots.

Signed-off-by: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
---
 arch/x86/kvm/mmu/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 45e1573f8f1d..22803916a609 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5168,7 +5168,7 @@ static void __kvm_mmu_free_obsolete_roots(struct kvm *kvm, struct kvm_mmu *mmu)
 		roots_to_free |= KVM_MMU_ROOT_CURRENT;
 
 	for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++) {
-		if (is_obsolete_root(kvm, mmu->root.hpa))
+		if (is_obsolete_root(kvm, mmu->prev_roots.hpa))
 			roots_to_free |= KVM_MMU_ROOT_PREVIOUS(i);
 	}
 
-- 
2.30.2