Oops, the tweak was not correct, go with my original version.

Pointed out by tb.

diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c
index 38b97a8..a3b3d65 100644 (file)
--- a/sbin/ping/ping.c
+++ b/sbin/ping/ping.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ping.c,v 1.247 2022/12/01 07:11:17 florian Exp $      */
+/*     $OpenBSD: ping.c,v 1.248 2022/12/01 07:34:06 florian Exp $      */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -1525,7 +1525,7 @@ pr_ipopt(int hlen, u_char *buf)
                        break;
                default:
                        printf("\nunknown option %x", *cp);
-                       if (cp[IPOPT_OLEN] > 0 && cp[IPOPT_OLEN] < hlen) {
+                       if (cp[IPOPT_OLEN] > 0 && (cp[IPOPT_OLEN] - 1) <= hlen) {
                                hlen = hlen - (cp[IPOPT_OLEN] - 1);
                                cp = cp + (cp[IPOPT_OLEN] - 1);
                        } else