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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2019-05-07 19:06:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 10:13:00 +0300 |
| commit | 4ff7d3d1986f7c8ae88b943f43d46f1362ac8d07 (patch) | |
| tree | b0106cca0150be4012b4181a920ba6ed35a4fc4d | |
| parent | 95fdf43fe06bfcc18644cb70291beac5e5f8f191 (diff) | |
| download | linux-4ff7d3d1986f7c8ae88b943f43d46f1362ac8d07.tar.xz | |
KVM: nVMX: Don't dump VMCS if virtual APIC page can't be mapped
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>
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 4ca834d22169..dffada006af2 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2891,9 +2891,6 @@ 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(); } } |