int Jsi_ObjArraySizer(Jsi_Interp *interp, Jsi_Obj *obj, uint len)
{
    int nsiz = len + 1, mod = ALLOC_MOD_SIZE;
    assert(obj->isarrlist);
    if (mod>1)
        nsiz = nsiz + ((mod-1) - (nsiz + mod - 1)%mod);
    if (nsiz > MAX_ARRAY_LIST) {
        Jsi_LogError("array size too large");
        return 0;
    }
    if (len >= obj->arrMaxSize) {
        int oldsz = (nsiz-obj->arrMaxSize);
        obj->arr = (Jsi_Value**)Jsi_Realloc(obj->arr, nsiz*sizeof(Jsi_Value*));
        memset(obj->arr+obj->arrMaxSize, 0, oldsz*sizeof(Jsi_Value*));
        obj->arrMaxSize = nsiz;
    }
    if (len>obj->arrCnt)
        obj->arrCnt = len;
    return nsiz;
}
The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.