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Date:      Mon, 11 Sep 2023 09:57:25 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 273715] dumpon: Kernel panic on boot when enabling dumpon over IP
Message-ID:  <bug-273715-227-zBzEPz7DlR@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-273715-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-273715-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273715

--- Comment #2 from Michael Gmelin <grembo@FreeBSD.org> ---
(In reply to Mina Gali=C4=87 from comment #1)

It boots okay when using vtnet0, when calling "service dumpon restart" after
boot, the machine immediately reboots though. So it seems like something is
wrong with aliases.

When removing device aliases completely (and vlans, but I think these are
unrelated), it boots okay and can be reconfigured (via the service command)
after boot as well.

Note that this is what it looks like:


    # service dumpon restart
    kernel dumps on priority: device
    0: /dev/null
    server address: 192.168.255.1
    client address: 192.168.255.3
    gateway address: 192.168.255.1
    dumpon: getifaddrs: Operation not permitted
    /etc/rc.d/dumpon: WARNING: unable to specify vtnet0 as a dump device

Despite the warning, netdump works correctly (tested via sysctl
debug.kdb.panic=3D1).

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