GROWTH_ALLOWANCE
tmpdata = OPENSSL_malloc(bdata->fault->msg.data_len + GROWTH_ALLOWANCE);
bdata->fault->msgalloc = bdata->fault->msg.data_len + GROWTH_ALLOWANCE;
buf = OPENSSL_malloc(msginlen + GROWTH_ALLOWANCE);
fault->handbufalloc = msginlen + GROWTH_ALLOWANCE;