KVM: nVMX: sync vmcs02 segment regs prior to vmx_set_cr0

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Segment registers must be synchronized prior to any code that may
trigger a call to emulation_required()/guest_state_valid(), e.g.
vmx_set_cr0().  Because preparing vmcs02 writes segmentation fields
directly, i.e. doesn't use vmx_set_segment(), emulation_required
will not be re-evaluated when synchronizing the segment registers,
which can result in L0 incorrectly starting emulation of L2.

Fixes: 8665c3f973 ("KVM: nVMX: initialize descriptor cache fields in prepare_vmcs02_full")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
[Move all of prepare_vmcs02_full earlier, not just segment registers. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2018-03-05 09:33:27 -08:00 • committed by Paolo Bonzini

parent e13c2ac512

commit 9d1887ef32

1 changed files with 5 additions and 5 deletions

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arch/x86/kvm/vmx.c

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