panic: trap type 4, code=0, pc=ffffffff819ba81e
Starting stack trace...
panic(ffffffff82fb2eea) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff8000376153f0) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80002a47aa68,ffff8000376156a0,ffff8000376155f0) at sys_semop+0x3ae sys/kern/sysv_sem.c:620
syscall(ffff8000376156a0) at syscall+0x97 verify_smap sys/arch/amd64/amd64/trap.c:502 [inline]
syscall(ffff8000376156a0) at syscall+0x97 sys/arch/amd64/amd64/trap.c:558
e
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x10ffc030280, count: 251
End of stack trace.
syncing disks...s= 0
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machine ddbcpu 1
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