[Bug 201466] ifconfig called from ruby shell class causes kernel panic

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201466

--- Comment #8 from Preetpal Sohal <preetpal.sohal at gmail.com> ---
I did some more testing with other time intervals (0.05 as well as no delay).
Still could not reproduce on FreeBSD 11.1 AMD64.

root at freebsd-gateway:~ # sh
# for i in $(jot 100); do result=$(ifconfig epair create); sleep 0.25; ifconfig
$result destroy; done
# uname -a
FreeBSD freebsd-gateway 11.1-RELEASE-p4 FreeBSD 11.1-RELEASE-p4 #0: Tue Nov 14
06:12:40 UTC 2017    
root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
# for i in $(jot 100); do result=$(ifconfig epair create); sleep 0.05; ifconfig
$result destroy; done
# echo "Still fine"
Still fine
# for i in $(jot 100); do result=$(ifconfig epair create); ifconfig $result
destroy; done
# echo "Again, still fine"
Again, still fine
# whoami
root
#

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