freebsd stable - Apr 2018 - [Bug 227213] FreeBSD 10.4 kernel deadlocks on sysctlmemlock

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227213

--- Comment #15 from Mark Knight <markk at knigma.org> ---
Created attachment 192199
  -->
https://bugs.freebsd.org/bugzilla/attachment.cgi?id=192199&action=edit
Kernel config file

Attached kernel config. My kernel is close to generic, extras are:
> options         IPFIREWALL
> options         IPDIVERT
> options         DUMMYNET
then added these for debug, but the problem occurred without them:
> options         KDB_UNATTENDED
> options         DDB                     # Support DDB.
> options         GDB                     # Support remote GDB.
> options         INVARIANTS              # Enable calls of extra sanity
checking
> options         INVARIANT_SUPPORT       # Extra sanity checks of internal
structures, required by INVARIANTS
> options         WITNESS                 # Enable checks to detect deadlocks
and cycles
> options         WITNESS_SKIPSPIN        # Don't run witness on
spinlocks for speed
You've probably got these from loader.conf, but I also have these:

mkn at shrewd$ kldstat
Id Refs Address            Size     Name
 1   35 0xffffffff80200000 17dbb70  kernel
 2    1 0xffffffff819dc000 215a8    geom_eli.ko
 3    2 0xffffffff819fe000 352d0    crypto.ko
 4    1 0xffffffff81a34000 23fb0    geom_mirror.ko
 5    1 0xffffffff81a58000 157c0    aio.ko
 6    1 0xffffffff81a6e000 4a70     coretemp.ko
 7    1 0xffffffff81a73000 b188     sem.ko
 8    1 0xffffffff81a7f000 26e0     cc_cubic.ko
 9    1 0xffffffff81c11000 56c6     fdescfs.ko
10    1 0xffffffff81c17000 8df4     uftdi.ko
11    1 0xffffffff81c20000 54c4     ucom.ko
12    1 0xffffffff81c26000 3d12c    linux.ko
13    2 0xffffffff81c64000 683b     linux_common.ko
14    1 0xffffffff81c6b000 37ae9    linux64.ko

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