https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213896
--- Comment #10 from gronke <ste...@gronke.net> ---
I used a similar script to reproduce the bug and noticed it only occurs when
the host's epair nic went up before destroying the jail.
This snippet manually attaches the nic to the jail after it was started and
takes "yes" as first argument to change the host's nic state.
$ ./crash-demo.sh no
...
> done
$ ./crash-demo.sh yes
> crash
--
#!/bin/sh
UPDOWNIF="$1"
BRIDGE_IF=bridge1
ifconfig $BRIDGE_IF create
set -x
for i in $(seq 0 200); do
#jail -c vnet persist path=$RELEASE_FOLDER name=jail-vnet
jail -c vnet persist name=jail-vnet
epair_a="$(ifconfig epair create)"
epair_b="$(echo $epair_a | rev | cut -c2- | rev)b"
mac_a=$(openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//')
ifconfig $epair_a name a-$i
ifconfig a-$i ether "$mac_a"
if [ "$UPDOWNIF" == "yes" ]; then
ifconfig a-$i up
fi
ifconfig $BRIDGE_IF addm a-$i
ifconfig $epair_b vnet jail-vnet
jexec jail-vnet /sbin/ifconfig $epair_b name vnet0
jexec jail-vnet /sbin/ifconfig vnet0 up
jexec jail-vnet /sbin/ifconfig
jail -r jail-vnet
if [ "$UPDOWNIF" == "yes" ]; then
ifconfig a-$i down
fi
ifconfig $BRIDGE_IF deletem a-$i
ifconfig a-$i destroy
done
echo "done"
--
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