https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295995
Bug ID: 295995
Summary: rtadvd segfault with -d
Product: Base System
Version: 15.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
rtadvd segfaults when run with the -d flag in my environment. It seems to be
caused by sections like the following in rtadvd.c:
/* O flag */
if ((nra->nd_ra_flags_reserved & ND_RA_FLAG_OTHER) !=
rai->rai_otherflg) {
syslog(LOG_NOTICE,
"O flag inconsistent on %s:"
" %s from %s, %s from us",
ifi->ifi_ifname, on_off[!rai->rai_otherflg],
inet_ntop(AF_INET6, &from->sin6_addr, ntopbuf,
sizeof(ntopbuf)), on_off[rai->rai_otherflg]);
inconsistent++;
}
where rai->rai_otherflg in this case is 0x40 but handled as a bool. Here's a
diff that fixes it for my case as well as other similarly-handled flags:
--- config.c.orig 2025-12-04 16:54:44.000000000 +0000
+++ config.c 2026-06-11 11:59:51.691932000 +0100
@@ -443,8 +443,8 @@
} else
MAYHAVE(val, "raflags", 0);
- rai->rai_managedflg = val & ND_RA_FLAG_MANAGED;
- rai->rai_otherflg = val & ND_RA_FLAG_OTHER;
+ rai->rai_managedflg = !!(val & ND_RA_FLAG_MANAGED);
+ rai->rai_otherflg = !!(val & ND_RA_FLAG_OTHER);
#ifndef ND_RA_FLAG_RTPREF_MASK
#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
@@ -456,7 +456,7 @@
goto getconfig_free_rai;
}
#ifdef DRAFT_IETF_6MAN_IPV6ONLY_FLAG
- rai->rai_ipv6onlyflg = val & ND_RA_FLAG_IPV6_ONLY;
+ rai->rai_ipv6onlyflg = !!(val & ND_RA_FLAG_IPV6_ONLY);
#endif
MAYHAVE(val, "rltime", rai->rai_maxinterval * 3);
--
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