panic: trap type 4, code=0, pc=ffffffff818750fb
Starting stack trace...
panic(ffffffff83311524) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c1454a0) at kerntrap+0x2bb sys/arch/amd64/amd64/trap.c:482
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80002ccf9738,ffff80003c145750,ffff80003c1456a0) at sys_semop+0x45b sys/kern/sysv_sem.c:615
syscall(ffff80003c145750) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c145750) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x27d5172a710, count: 251
End of stack trace.