From: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
When freeing obsolete previous roots, check prev_roots as intended, not
the current root.
Signed-off-by: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
Fixes: 527d5cd7eece ("KVM: x86/mmu: Zap only obsolete roots if a root shadow page is zapped")
Cc: stable@xxxxxxxxxxxxxxx
---
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 f4653688fa6d..e826ee9138fa 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5179,7 +5179,7 @@ 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[i].hpa))
roots_to_free |= KVM_MMU_ROOT_PREVIOUS(i);
}
--
2.30.2
