From: Jan Kiszka <[email protected]> commit cf64527bb33f6cec2ed50f89182fc4688d0056b6 upstream.
Letting this pend may cause nested_get_vmcs12_pages to run against an invalid state, corrupting the effective vmcs of L1. This was triggerable in QEMU after a guest corruption in L2, followed by a L1 reset. Signed-off-by: Jan Kiszka <[email protected]> Reviewed-by: Liran Alon <[email protected]> Cc: [email protected] Fixes: 7f7f1ba33cf2 ("KVM: x86: do not load vmcs12 pages while still in SMM") Signed-off-by: Paolo Bonzini <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/x86/kvm/vmx.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -8490,6 +8490,8 @@ static void free_nested(struct vcpu_vmx if (!vmx->nested.vmxon && !vmx->nested.smm.vmxon) return; + kvm_clear_request(KVM_REQ_GET_VMCS12_PAGES, &vmx->vcpu); + hrtimer_cancel(&vmx->nested.preemption_timer); vmx->nested.vmxon = false; vmx->nested.smm.vmxon = false;
