[Bug 255882] vxlan(4): kernel panic when unloading module if vxlan interface in VNET jails not shutdown before jail shutdown

[b***@freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255882

Mark Linimon <***@FreeBSD.org> changed:

What |Removed |Added
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Assignee|***@FreeBSD.org |***@FreeBSD.org
Keywords| |panic

[b***@freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255882

Aleksandr Fedorov <***@FreeBSD.org> changed:

What |Removed |Added
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CC| |***@FreeBSD.org

--- Comment #1 from Aleksandr Fedorov <***@FreeBSD.org> ---
The problem is easily reproducible:

# kldload if_vxlan
# jail -c name=j1 persist vnet
# jexec j1 ifconfig vxlan create
vxlan0
# jail -r j1
# jail -c name=j1 persist vnet
# jexec j1 ifconfig vxlan create
vxlan1
# jail -r j1
# kldunload if_vxlan
panic!!!

Unfortunately if_vxlan (4) does not support VNET.
There was an attempt, but not finished:
https://reviews.freebsd.org/D2868?id=6328#change-57yzNcgb46N6