Date: Wed, 12 Feb 2025 22:13:28 +0800 From: Zhenlei Huang <zlei@FreeBSD.org> To: A FreeBSD User <freebsd@walstatt-de.de> Cc: FreeBSD CURRENT <freebsd-current@freebsd.org>, freebsd-net@freebsd.org Subject: Re: rtadvctl -vv show : Segmentation fault Message-ID: <40962DA9-AAE6-4B6D-8240-703D2E364DA5@FreeBSD.org> In-Reply-To: <20250211224239.51cf1d2e@thor.sb211.local> References: <20250211224239.51cf1d2e@thor.sb211.local>
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[-- Attachment #1 --] > On Feb 12, 2025, at 5:42 AM, A FreeBSD User <freebsd@walstatt-de.de> wrote: > > 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. Do you get the core dump ? You can attach the core to gdb or lldb to easily figure out which line of source code is to be blamed. > > To solve this, we have to restart rtadvd. > > -- > > A FreeBSD user [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iNUEARYKAH0WIQRj28YmNowGX1isJg7GJJ6Jgbd0XwUCZ6ysiF8UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0NjNE QkM2MjYzNjhDMDY1RjU4QUMyNjBFQzYyNDlFODk4MUI3NzQ1RgAKCRDGJJ6Jgbd0 X34bAQDlQpib6mzf1H0zWdPzHfjiQNBo1plcoQVQxBEI3C2jNQEAuKX8y7NwALGT DuIHoRWhV3C+WbckW0d1FjZ6RqDblwE= =fvf+ -----END PGP SIGNATURE-----
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