[Bug 237568] nginx causes host panic when closing socket descriptor?

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237568

--- Comment #3 from rlwestlund at gmail.com ---
We're unable to reproduce it now. It may have been fixed in the patches since
then. I did get another symptom that might have been related before, which is
the jails failing to unmount on jail -r with "Device busy". Previously we
traced that error to TCP connections being left open in TIME_WAIT state, but on
the server that used to crash it happened always even if the jail had just been
started. Since then we had solved it with a tcpdrop script as an exec.poststop
hook, but with the server I just spun up to test it it still happened a few
times. Once I looked into it and couldn't find anything wrong with the tcpdrop
script I couldn't get the Device busy error to happen anymore. I'm not sure if
this is related.

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