[Bug 218886] ifconfig lagg0 destroy will crash the system

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218886

--- Comment #5 from Lutz Rabing <ecin at rabing.de> ---
(In reply to Alan Somers from comment #4)
Yes, dumpdev="NO"  was set in rc.conf. I changed it to AUTO and
repeated the crash. There is just a info.0 and vmcore.0:

drwxr-x---   2 root  wheel           8 May  2 16:34 .
drwxr-xr-x  25 root  wheel          25 May  2 18:34 ..
-rw-r--r--   1 root  wheel           2 May  2 16:34 bounds
-rw-------   1 root  wheel         452 May  2 16:34 info.0
lrwxr-xr-x   1 root  wheel           6 May  2 16:34 info.last -> info.0
-rw-r--r--   1 root  wheel           5 Nov 11  2014 minfree
-rw-------   1 root  wheel  1013112832 May  2 16:34 vmcore.0
lrwxr-xr-x   1 root  wheel           8 May  2 16:34 vmcore.last -> vmcore.0

# cat info.0
Dump header from device: /dev/gpt/swap2
  Architecture: amd64
  Architecture Version: 2
  Dump Length: 1013112832
  Blocksize: 512
  Dumptime: Tue May  2 16:33:14 2017
  Hostname: core10.omc.net
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 11.0-RELEASE-p9 #0: Tue Apr 11 08:48:40 UTC 2017
    root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
  Panic String: page fault
  Dump Parity: 3897632610
  Bounds: 0
  Dump Status: good

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