clear errno before strtoull as it may already be set to ERANGE

noticed and ok millert@

diff --git a/usr.sbin/smtpd/lka_filter.c b/usr.sbin/smtpd/lka_filter.c
index 18ac7c1..bb5e8f4 100644 (file)
--- a/usr.sbin/smtpd/lka_filter.c
+++ b/usr.sbin/smtpd/lka_filter.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: lka_filter.c,v 1.71 2023/06/21 17:56:26 op Exp $      */
+/*     $OpenBSD: lka_filter.c,v 1.72 2023/06/21 17:59:24 op Exp $      */
 
 /*
  * Copyright (c) 2018 Gilles Chehade <gilles@poolp.org>
@@ -605,6 +605,8 @@ lka_filter_process_response(const char *name, const char *line)
        if ((ep = strchr(kind, '|')) == NULL)
                fatalx("Missing token: %s", line);
        qid = ep+1;
+
+       errno = 0;
        reqid = strtoull(qid, &ep, 16);
        if (qid[0] == '\0' || *ep != '|')
                fatalx("Invalid reqid: %s", line);