KVM: s390: Fix memory leak on busy SIGP stop

commit 7dfc63cf977447e09b1072911c22564f900fc578
(KVM: s390: allow only one SIGP STOP (AND STORE STATUS) at a time)
introduced a memory leak if a sigp stop is already pending. Free
the allocated inti structure.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>

arch/s390/kvm/sigp.c

@@ -139,6 +139,7 @@ static int __inject_sigp_stop(struct kvm_vcpu *dst_vcpu, int action)
 	spin_lock(&li->lock);
 	if (li->action_bits & ACTION_STOP_ON_STOP) {
 		/* another SIGP STOP is pending */
+		kfree(inti);
 		rc = SIGP_CC_BUSY;
 		goto out;
 	}