Based on the provided code slice and the identified vulnerability (CWE-476: NULL Pointer Dereference) on line 32, here are five possible patches to address the issue:

Patch 1:
```c
32     table = fib6_get_table(net, tb_id);
33     if (!table) {
34         err = -EAGAIN;
35         goto out;
36     }
```

Patch 2:
```c
32     table = fib6_get_table(net, tb_id);
33     if (table == NULL) {
34         err = -EINVAL;
35         goto out;
36     }
```

Patch 3:
```c
32     table = fib6_get_table(net, tb_id);
33     if (IS_ERR_OR_NULL(table)) {
34         err = PTR_ERR(table) ?: -EINVAL;
35         goto out;
36     }
```

Patch 4:
```c
32     table = fib6_get_table(net, tb_id);
33     if (!table) {
34         pr_err("Failed to get IPv6 table for tb_id %u\n", tb_id);
35         err = -ENOENT;
36         goto out;
37     }
```

Patch 5:
```c
31     tb_id = fib_rule_get_table(rule, arg);
32     if (tb_id == 0) {
33         err = -EINVAL;
34         goto out;
35     }
36     table = fib6_get_table(net, tb_id);
37     if (!table) {
38         err = -EAGAIN;
39         goto out;
40     }
```

These patches aim to check if the `table` pointer is NULL after calling `fib6_get_table()` and handle the error condition appropriately. Each patch provides a slightly different approach to error handling and reporting.