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KVM: x86/mmu: Set kvm_page_fault.hva to KVM_HVA_ERR_BAD for "no slot" faults

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Explicitly set fault->hva to KVM_HVA_ERR_BAD when handling a "no slot"
fault to ensure that KVM doesn't use a bogus virtual address, e.g. if
there *was* a slot but it's unusable (APIC access page), or if there
really was no slot, in which case fault->hva will be '0' (which is a
legal address for x86).

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Message-ID: <20240228024147.41573-15-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2024-02-27 18:41:45 -08:00 committed by Paolo Bonzini
parent f6adeae81f
commit 36d4492765
1 changed files with 1 additions and 0 deletions
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arch/x86/kvm/mmu/mmu.c
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@ -3272,6 +3272,7 @@ static int kvm_handle_noslot_fault(struct kvm_vcpu *vcpu,
fault->slot = NULL;
fault->pfn = KVM_PFN_NOSLOT;
fault->map_writable = false;
fault->hva = KVM_HVA_ERR_BAD;
/*
* If MMIO caching is disabled, emulate immediately without