CID 1374307 (#1 of 1): Dereference before null check (REVERSE_INULL)
check_after_deref: Null-checking dns_state suggests that it may be null,
but it has already been dereferenced on all paths leading to the check.
317 if (dns_state != NULL && f != NULL) {
318 dns_state->last_resp = f->lastts;
319 }