To generate this patch, we can follow these reasoning steps:

Step 1. Root Cause Analysis:

1. Input Validation:
   - The code reads `pps_id` using `gf_bs_read_ue_log(bs, "pps_id")`.
   - This function likely returns an unsigned integer (u32).

2. Bounds Checking:
   - The code checks if `pps_id >= 64`, but doesn't check for a lower bound.
   - The array access `vvc->pps[pps_id]` assumes `pps_id` is non-negative.

3. Potential Vulnerability:
   - If `pps_id` is negative, it could lead to an out-of-bounds read when accessing `vvc->pps[pps_id]`.
   - This is a CWE-125 (Out-of-bounds Read) vulnerability.

Conclusion:
The vulnerability occurs because the code only checks the upper bound of `pps_id` but not the lower bound. If `pps_id` is negative, it could lead to an out-of-bounds read.

Step 2. Fixing Strategy:

To fix this vulnerability, we need to ensure that `pps_id` is within the valid range for array indexing. This means checking both the lower and upper bounds.

1. Add a check for the lower bound:
   - Ensure `pps_id` is non-negative.

2. Combine with existing upper bound check:
   - Keep the existing check for `pps_id >= 64`.

3. Implement the fix:
   - Modify the condition to check both bounds in a single if statement.

Therefore, the patch should be:

```
< 	if (pps_id >= 64)
---
> 	if ((pps_id<0) || (pps_id >= 64))
```

This patch ensures that `pps_id` is both non-negative and less than 64, preventing out-of-bounds access to the `vvc->pps` array.