kvm_init didn't set return value after create vm failed
And kvm_ioctl(s, KVM_CREATE_VM, 0)'s return value can be < -1, so change the check of vmfd at label 'err'. Signed-off-by: NXu He Jie <xuhj@linux.vnet.ibm.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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