panic: trap type 4, code=0, pc=ffffffff81a38dde
Starting stack trace...
panic(ffffffff832e1e01) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff800033535410) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
lf_advlock(ffff80000144e420,0,fffffd8067f51b40,8,ffff800033535608,30) at lf_advlock+0x2ee ls_ref sys/kern/vfs_lockf.c:138 [inline]
lf_advlock(ffff80000144e420,0,fffffd8067f51b40,8,ffff800033535608,30) at lf_advlock+0x2ee sys/kern/vfs_lockf.c:278
VOP_ADVLOCK(fffffd806c5bf648,fffffd8067f51b40,8,ffff800033535608,30) at VOP_ADVLOCK+0x87 sys/kern/vfs_vops.c:620
sys_flock(ffff80002a7bc2a0,ffff800033535750,ffff8000335356a0) at sys_flock+0x291
syscall(ffff800033535750) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x97f20d0d480, count: 249
End of stack trace.