panic: vclean: deadlock
Starting stack trace...
panic(ffffffff830dcab3) at panic+0x1d0 sys/kern/subr_prf.c:229
vclean(fffffd8076a699a0,8,ffff8000371c76f8) at vclean+0x482 sys/kern/vfs_subr.c:1065
vgonel(fffffd8076a699a0,ffff8000371c76f8) at vgonel+0xec sys/kern/vfs_subr.c:1197
checkalias(fffffd806a4379a8,504,ffff800000a66c00) at checkalias+0x1ab
ffs_vinit(ffff800000a66c00,ffff800030a391f0) at ffs_vinit+0x13d
ffs_vget(ffff800000a66c00,14434,ffff800030a392d8) at ffs_vget+0x429 sys/ufs/ffs/ffs_vfsops.c:1283
ufs_lookup() at ufs_lookup+0x16bc sys/ufs/ufs/ufs_lookup.c:573
VOP_LOOKUP(fffffd807ec0d1b0,ffff800030a396b0,ffff800030a396e0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff800030a39680) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
namei(ffff800030a39680) at namei+0x7aa sys/kern/vfs_lookup.c:250
ptmioctl(5100,40287401,ffff800030a399a0,3,ffff8000371c76f8) at ptmioctl+0x4cb sys/kern/tty_pty.c:1143
VOP_IOCTL(fffffd806e091440,40287401,ffff800030a399a0,3,fffffd807f7d3548,ffff8000371c76f8) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd805ad37c80,40287401,ffff800030a399a0,ffff8000371c76f8) at vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525
sys_ioctl(ffff8000371c76f8,ffff800030a39b80,ffff800030a39ad0) at sys_ioctl+0x67c
syscall(ffff800030a39b80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff800030a39b80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc4b605b6330, count: 241
End of stack trace.