void *load_device_tree(const char *filename_path, int *sizep)
{
    int dt_size;
    int dt_file_load_size;
    int ret;
    void *fdt = NULL;

    *sizep = 0;
    dt_size = get_image_size(filename_path);
    if (dt_size < 0) {
        error_report("Unable to get size of device tree file '%s'",
                     filename_path);
        goto fail;
    }

    /* Expand to 2x size to give enough room for manipulation.  */
    dt_size += 10000;
    dt_size *= 2;
     /* First allocate space in qemu for device tree */
     fdt = g_malloc0(dt_size);
 
    dt_file_load_size = load_image_size(filename_path, fdt, dt_size);
     if (dt_file_load_size < 0) {
         error_report("Unable to open device tree file '%s'",
                      filename_path);
        goto fail;
    }

    ret = fdt_open_into(fdt, fdt, dt_size);
    if (ret) {
        error_report("Unable to copy device tree in memory");
        goto fail;
    }

    /* Check sanity of device tree */
    if (fdt_check_header(fdt)) {
        error_report("Device tree file loaded into memory is invalid: %s",
                     filename_path);
        goto fail;
    }
    *sizep = dt_size;
    return fdt;

fail:
    g_free(fdt);
    return NULL;
}

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.