From: Mircea Cîrjaliu <[email protected]> This change is needed because the introspection tool can write-protect guest page tables or exec-protect heap/stack pages.
Signed-off-by: Mircea Cîrjaliu <[email protected]> Signed-off-by: Adalbert Lazăr <[email protected]> --- arch/x86/kvm/mmu/mmu.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 7c6368ddc6a5..35be9f2a2fc7 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5536,8 +5536,13 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code, if (WARN_ON(!VALID_PAGE(vcpu->arch.mmu->root_hpa))) return RET_PF_RETRY; - /* With shadow page tables, fault_address contains a GVA or nGPA. */ - if (vcpu->arch.mmu->direct_map) { + /* + * With shadow page tables, fault_address contains a GVA or nGPA. + * On a fetch fault, fault_address contains the instruction pointer. + */ + if (vcpu->arch.mmu->direct_map && + likely(!(error_code & PFERR_FETCH_MASK)) && + (error_code & PFERR_GUEST_FINAL_MASK)) { vcpu->arch.gpa_available = true; vcpu->arch.gpa_val = cr2_or_gpa; } _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
