uvm_fault(fffffd80690dcdc0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600
kpageflttrap(ffff800035699210,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279
kerntrap(ffff800035699210) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x62
kern_sysctl(ffff800035699594,5,20000100,ffff8000356995c8,0,37,491da4627210f4fc) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500
sys_sysctl(ffff80003018ace8,ffff800035699700,ffff800035699650) at sys_sysctl+0x422
syscall(ffff800035699700) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff800035699700) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf016ced15e0, count: -24
ddb{0}> machine ddbcpu 1
Stopped at      proc_trampoline+0xc7:   movl    $0,%gs:0x680
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x740477184450, count: 14
ddb{1}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x740477184450, count: -1