WM_SYMBOL int WildMidi_SetOption(midi * handle, uint16_t options, uint16_t setting) {
    struct _mdi *mdi;

    if (!WM_Initialized) {
        _WM_GLOBAL_ERROR(__FUNCTION__, __LINE__, WM_ERR_NOT_INIT, NULL, 0);
        return (-1);
    }
    if (handle == NULL) {
        _WM_GLOBAL_ERROR(__FUNCTION__, __LINE__, WM_ERR_INVALID_ARG, "(NULL handle)", 0);
        return (-1);
    }

    mdi = (struct _mdi *) handle;
    _WM_Lock(&mdi->lock);
    if ((!(options & 0x800F)) || (options & 0x7FF0)) {
        _WM_GLOBAL_ERROR(__FUNCTION__, __LINE__, WM_ERR_INVALID_ARG, "(invalid option)", 0);
        _WM_Unlock(&mdi->lock);
        return (-1);
    }
    if (setting & 0x7FF0) {
        _WM_GLOBAL_ERROR(__FUNCTION__, __LINE__, WM_ERR_INVALID_ARG, "(invalid setting)", 0);
        _WM_Unlock(&mdi->lock);
        return (-1);
    }

    mdi->extra_info.mixer_options = ((mdi->extra_info.mixer_options & (0x80FF ^ options))
                                    | (options & setting));

    if (options & WM_MO_LOG_VOLUME) {
            _WM_AdjustChannelVolumes(mdi, 16);  // Settings greater than 15
    } else if (options & WM_MO_REVERB) {
        _WM_reset_reverb(mdi->reverb);
    }

    _WM_Unlock(&mdi->lock);
    return (0);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.