diff --git a/sys/amd64/vmm/vmm_snapshot.c b/sys/amd64/vmm/vmm_snapshot.c
--- a/sys/amd64/vmm/vmm_snapshot.c
+++ b/sys/amd64/vmm/vmm_snapshot.c
@@ -57,7 +57,7 @@
 vm_snapshot_buf(void *data, size_t data_size, struct vm_snapshot_meta *meta)
 {
 	struct vm_snapshot_buffer *buffer;
-	int op;
+	int op, error;
 
 	buffer = &meta->buffer;
 	op = meta->op;
@@ -68,11 +68,14 @@
 	}
 
 	if (op == VM_SNAPSHOT_SAVE)
-		copyout(data, buffer->buf, data_size);
+		error = copyout(data, buffer->buf, data_size);
 	else if (op == VM_SNAPSHOT_RESTORE)
-		copyin(buffer->buf, data, data_size);
+		error = copyin(buffer->buf, data, data_size);
 	else
-		return (EINVAL);
+		error = EINVAL;
+
+	if (error)
+		return (error);
 
 	buffer->buf += data_size;
 	buffer->buf_rem -= data_size;
@@ -104,30 +107,29 @@
 {
 	struct vm_snapshot_buffer *buffer;
 	int op;
-	int ret;
+	int error;
 
 	buffer = &meta->buffer;
 	op = meta->op;
 
 	if (buffer->buf_rem < data_size) {
 		printf("%s: buffer too small\r\n", __func__);
-		ret = E2BIG;
-		goto done;
+		return (E2BIG);
 	}
 
 	if (op == VM_SNAPSHOT_SAVE) {
-		ret = 0;
-		copyout(data, buffer->buf, data_size);
+		error = copyout(data, buffer->buf, data_size);
 	} else if (op == VM_SNAPSHOT_RESTORE) {
-		ret = memcmp(data, buffer->buf, data_size);
+		error = memcmp(data, buffer->buf, data_size);
 	} else {
-		ret = EINVAL;
-		goto done;
+		error = EINVAL;
 	}
 
+	if (error)
+		return (error);
+
 	buffer->buf += data_size;
 	buffer->buf_rem -= data_size;
 
-done:
-	return (ret);
+	return (0);
 }