KVM: X86: Fix when shadow_root_level=5 && guest root_level<4

[mirror_ubuntu-jammy-kernel.git] / arch / x86 / kvm / mmu / mmu.c

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index c9b1d63d3cfba40f66e01b14d028225e7977be94..287fc1086db78419a44cef67fb0c993838713525 100644 (file)
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2188,10 +2188,10 @@ static void shadow_walk_init_using_root(struct kvm_shadow_walk_iterator *iterato
        iterator->shadow_addr = root;
        iterator->level = vcpu->arch.mmu->shadow_root_level;
 
-       if (iterator->level == PT64_ROOT_4LEVEL &&
+       if (iterator->level >= PT64_ROOT_4LEVEL &&
            vcpu->arch.mmu->root_level < PT64_ROOT_4LEVEL &&
            !vcpu->arch.mmu->direct_map)
-               --iterator->level;
+               iterator->level = PT32E_ROOT_LEVEL;
 
        if (iterator->level == PT32E_ROOT_LEVEL) {
                /*