[Bug 234985] kernel panic when destroying epair interface of vnet jail after using ifconfig inside the jail

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234985

Rocco <v_bachvarov at mail.bg> changed:

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                 CC|                            |v_bachvarov at mail.bg

--- Comment #5 from Rocco <v_bachvarov at mail.bg> ---
I have had the same problem quite early on. I believe it is a bug in the VNET
cleanup code.
It has an easy workaround, which works quite well in my setup:

Before destroying the interface, remove it from the jail (maybe use a prestop
hook in the jail.conf). Use this command on the host:

ifconfig $interfaceName -vnet $jailName

It will remove the interface from the jail's VNET. Then you can destroy the
epair on the host.

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