Commit 73cb8556 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
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KVM: nVMX: Don't dump VMCS if virtual APIC page can't be mapped 



... 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: 69090810 ("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: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 8ef863e6

arch/x86/kvm/vmx/nested.c

+0 −3
Original line number Diff line number Diff line
@@ -2880,9 +2880,6 @@ static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu) 
			 */

			vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL,

					CPU_BASED_TPR_SHADOW);

		} else {

			printk("bad virtual-APIC page address\n");

			dump_vmcs();

		}

	}