Which of the following memory violations (if any) does the following function have?

1: int fun(int k) { 2: int * tmp 3: tmp = (int *) calloc(k, sizeof(int)); 4: for (int i = 0; i < k; i++) 5: scanf("%d", &tmp[i]) 6: realloc(tmp, sizeof(int) * k * 2); 7: int ans = tmp[k-1]; 8: free(tmp); 9: return ans 10:}