Q: Given the following code slice:
```
1 static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now)
5 	u64 tdelta, delay, new_delay;```
which has a CWE-190 vulnerability at line:
```
5 	u64 tdelta, delay, new_delay;
```
Please analyze the root cause of the vulnerability.