Date: Tue, 11 Feb 2025 22:42:12 +0100 From: A FreeBSD User <freebsd@walstatt-de.de> To: FreeBSD CURRENT <freebsd-current@freebsd.org> Cc: freebsd-net@freebsd.org Subject: rtadvctl -vv show : Segmentation fault Message-ID: <20250211224239.51cf1d2e@thor.sb211.local>
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Hello,
I'm running a small 14-STABLE (FreeBSD 14.2-STABLE #11 n270324-8d5d7e2ba3a6: Thu Feb 6
16:56:03 CET 2025 amd64) based router appliance, running rtadvd(8).
When stoppimg/starting mpd5 several times, changing the IPv6 prefix, I can almost with a 100%
certainty reproduce such an error calling rtadvctl:
[...]
root@gate:~ # rtadvctl -vv show
igb0: flags=<UP,CONFIGURED,PERSIST> status=<RA_SEND> mtu 1500
DefaultLifetime: 30m
MinAdvInterval/MaxAdvInterval: 3m20s/10m
AdvLinkMTU: <none>, Flags: <none>, Preference: medium
ReachableTime: 0s, RetransTimer: 0s, CurHopLimit: 64
AdvIfPrefixes: no
Next RA send: Tue Feb 11 22:36:21 2025
Last RA send: Tue Feb 11 22:30:23 2025
Prefixes (1):
Segmentation fault
[...]
The indication of such a rtadvd failure within our network is no prefix delegation any
more, several IPv6 on the (client) hosts's NICs are marked "deprecated" or "detached", but
none usable.
Checking on the gateway with the command shown above results in a segmentation fault ... funny.
To solve this, we have to restart rtadvd.
--
A FreeBSD user
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