Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.2 326/413] KVM: nVMX: Dont dump VMCS if virtual APIC page cant be mapped | Date | Wed, 24 Jul 2019 21:20:17 +0200 |
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From: Sean Christopherson <sean.j.christopherson@intel.com>
commit 73cb85568433feadb79e963bf2efba9b3e9ae3df upstream.
... as a malicious userspace can run a toy guest to generate invalid virtual-APIC page addresses in L1, i.e. flood the kernel log with error messages.
Fixes: 690908104e39d ("KVM: nVMX: allow tests to use bad virtual-APIC page address") Cc: stable@vger.kernel.org Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/x86/kvm/vmx/nested.c | 3 --- 1 file changed, 3 deletions(-)
--- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2878,9 +2878,6 @@ static void nested_get_vmcs12_pages(stru */ vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL, CPU_BASED_TPR_SHADOW); - } else { - printk("bad virtual-APIC page address\n"); - dump_vmcs(); } }
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