int64_t xbzrle_cache_resize(int64_t new_size)
{
    PageCache *new_cache;
    int64_t ret;

    if (new_size < TARGET_PAGE_SIZE) {
        return -1;
    }

    XBZRLE_cache_lock();

    if (XBZRLE.cache != NULL) {
        if (pow2floor(new_size) == migrate_xbzrle_cache_size()) {
            goto out_new_size;
        }
        new_cache = cache_init(new_size / TARGET_PAGE_SIZE,
                                        TARGET_PAGE_SIZE);
        if (!new_cache) {
            error_report("Error creating cache");
            ret = -1;
            goto out;
        }

        cache_fini(XBZRLE.cache);
        XBZRLE.cache = new_cache;
    }

out_new_size:
    ret = pow2floor(new_size);
out:
    XBZRLE_cache_unlock();
    return ret;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.