iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

kvm: nVMX: Add a vmentry check for HOST_SYSENTER_ESP and HOST_SYSENTER_EIP fields

Browse Source 
According to section "Checks on VMX Controls" in Intel SDM vol 3C, the
following check is performed on vmentry of L2 guests:

    On processors that support Intel 64 architecture, the IA32_SYSENTER_ESP
    field and the IA32_SYSENTER_EIP field must each contain a canonical
    address.

Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Krish Sadhukhan 2019-02-07 14:05:30 -05:00 committed by Paolo Bonzini
parent 05d5a48635
commit 711eff3a8f
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kvm/vmx/nested.c
View File

@ -2585,6 +2585,11 @@ static int nested_check_host_control_regs(struct kvm_vcpu *vcpu,
!nested_host_cr4_valid(vcpu, vmcs12->host_cr4) ||
!nested_cr3_valid(vcpu, vmcs12->host_cr3))
return -EINVAL;
if (is_noncanonical_address(vmcs12->host_ia32_sysenter_esp, vcpu) ||
is_noncanonical_address(vmcs12->host_ia32_sysenter_eip, vcpu))
return -EINVAL;
/*
* If the load IA32_EFER VM-exit control is 1, bits reserved in the
* IA32_EFER MSR must be 0 in the field for that register. In addition,