canfd_sanitize_len
len = canfd_sanitize_len(cf->len);
if (canfd_sanitize_len(cfd1->len) != canfd_sanitize_len(cfd2->len))
len = canfd_sanitize_len(cfd1->len);
len_sanitized = canfd_sanitize_len(cfd->len);
__msg_len = canfd_sanitize_len(__msg.len); \
cfd->len = canfd_sanitize_len(frame->length);
frame->length = canfd_sanitize_len(cfd->len);