kern/52602: Panic when trying to list probes after dtrace_sdt.kmod has been loaded

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>Number:         52602
>Category:       kern
>Synopsis:       Panic when trying to list probes after dtrace_sdt.kmod has been loaded
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 08 16:20:00 +0000 2017
>Originator:     Sevan Janiyan
>Release:        HEAD/201710080310Z
>Organization:
>Environment:
GENERIC i386 kernel
>Description:
system panics with 
uvm_fault(0xc12f7b40, 0xdc41f000, 1) -> 0xe
uvm_fault(0xc12f7b40, 0xdc41f000, 1) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 0 eip 0xc011d265 cs 0x8 eflag 0x10246 cr2 0xdc41f007 ilevel 0 esp 0xc0f777c8
curlwp 0xc4c902a0 pid 34 lid 1 lowest kstack 0xdcc032c8
kernel: supervisor trap mode page fault, code=0
Stopped in pid 34.1 (dtrace) at netbsd:trap+0x9e6: movzbl 0(%eax),%ecx
>How-To-Repeat:
modload dtrace_sdt.kmod
run dtrace -l
>Fix: