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Date: 2018-10-13 04:46:34
From: ganbold
Description: Lenovo Thinkpad T400
Copyright (c) 1992-2016 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 12.0-CURRENT #11 r308116M: Mon Oct 31 18:10:20 ULAT 2016
    [_EMAIL_XXXXXXXXXXXXXXXX]:/usr/obj/usr/src/sys/GENERIC i386
FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM 3.8.0)
WARNING: WITNESS option enabled, expect reduced performance.
VT(vga): resolution 640x480
info: [drm] Initialized drm 1.1.0 20060810
CPU: Intel(R) Core(TM)2 Duo CPU     T9400  @ 2.53GHz (2527.06-MHz 686-class CPU)
  Origin="GenuineIntel"  Id=0x10676  Family=0x6  Model=0x17  Stepping=6
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x8e3fd<SSE3,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1>
  AMD Features=0x20000000<LM>
  AMD Features2=0x1<LAHF>
  VT-x: HLT,PAUSE
  TSC: P-state invariant, performance statistics
real memory  = 2147483648 (2048 MB)
avail memory = 2013818880 (1920 MB)
ACPI APIC Table: <LENOVO TP-7U   >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
random: unblocking device.
ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Pm1aControlBlock: 16/32 (20160930/tbfadt-641)
ACPI BIOS Warning (bug): Invalid length for FADT/Pm1aControlBlock: 32, using default 16 (20160930/tbfadt-743)
ioapic0: Changing APIC ID to 1
ioapic0 <Version 2.0> irqs 0-23 on motherboard
random: entropy device external interface
kbd1 at kbdmux0
module_register_init: MOD_LOAD (vesa, 0xc1146490, 0) error 19
nexus0
vtvga0: <VT VGA driver> on motherboard
cryptosoft0: <software crypto> on motherboard
acpi0: <LENOVO TP-7U> on motherboard
CPU0: local APIC error 0x40
acpi_ec0: <Embedded Controller: GPE 0x11, ECDT> port 0x62,0x66 on acpi0
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
attimer0: <AT timer> port 0x40-0x43 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 950
Event timer "HPET" frequency 14318180 Hz quality 450
Event timer "HPET1" frequency 14318180 Hz quality 440
Event timer "HPET2" frequency 14318180 Hz quality 440
Event timer "HPET3" frequency 14318180 Hz quality 440
atrtc0: <AT realtime clock> port 0x70-0x71 irq 8 on acpi0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0x1800-0x1807 mem 0xf4400000-0xf47fffff,0xd0000000-0xdfffffff irq 16 at device 2.0 on pci0
agp0: <Intel GM45 SVGA controller> on vgapci0
agp0: aperture size is 256M, detected 32764k stolen memory
drmn0: <Mobile IntelĀ® GM45 Express Chipset> on vgapci0
intel_iicbb0 on drmn0
iicbus0: <Philips I2C bus> on iicbb0 addr 0xc2
iic0: <I2C generic I/O> on iicbus0
iicbus1: <Philips I2C bus> on intel_gmbus0
iic1: <I2C generic I/O> on iicbus1
intel_iicbb1 on drmn0
iicbus2: <Philips I2C bus> on iicbb1 addr 0xc2
iic2: <I2C generic I/O> on iicbus2
iicbus3: <Philips I2C bus> on intel_gmbus1
iic3: <I2C generic I/O> on iicbus3
intel_iicbb2 on drmn0
iicbus4: <Philips I2C bus> on iicbb2 addr 0xc2
iic4: <I2C generic I/O> on iicbus4
iicbus5: <Philips I2C bus> on intel_gmbus2
iic5: <I2C generic I/O> on iicbus5
intel_iicbb3 on drmn0
iicbus6: <Philips I2C bus> on iicbb3 addr 0xc2
iic6: <I2C generic I/O> on iicbus6
iicbus7: <Philips I2C bus> on intel_gmbus3
iic7: <I2C generic I/O> on iicbus7
intel_iicbb4 on drmn0
iicbus8: <Philips I2C bus> on iicbb4 addr 0xc2
iic8: <I2C generic I/O> on iicbus8
iicbus9: <Philips I2C bus> on intel_gmbus4
iic9: <I2C generic I/O> on iicbus9
intel_iicbb5 on drmn0
iicbus10: <Philips I2C bus> on iicbb5 addr 0xc2
iic10: <I2C generic I/O> on iicbus10
iicbus11: <Philips I2C bus> on intel_gmbus5
iic11: <I2C generic I/O> on iicbus11
info: [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
info: [drm] Driver supports precise vblank timestamp query.
drm_iic_dp_aux0 on drmn0
drmn0: taking over the fictitious range 0xd0000000-0xe0000000
info: [drm] Connector LVDS-1: get mode from tunables:
info: [drm]   - kern.vt.fb.modes.LVDS-1
info: [drm]   - kern.vt.fb.default_mode
info: [drm] Connector VGA-1: get mode from tunables:
info: [drm]   - kern.vt.fb.modes.VGA-1
info: [drm]   - kern.vt.fb.default_mode
info: [drm] Connector DP-1: get mode from tunables:
info: [drm]   - kern.vt.fb.modes.DP-1
info: [drm]   - kern.vt.fb.default_mode
fbd0 on drmn0
VT: Replacing driver "vga" with new "fb".
info: [drm] Initialized i915 1.6.0 20080730 for drmn0 on minor 0
vgapci0: Boot video device
vgapci1: <VGA-compatible display> mem 0xf4200000-0xf42fffff at device 2.1 on pci0
pci0: <simple comms> at device 3.0 (no driver attached)
atapci0: <Intel ATA controller> port 0x1828-0x182f,0x180c-0x180f,0x1820-0x1827,0x1808-0x180b,0x1810-0x181f irq 18 at device 3.2 on pci0
ata2: <ATA channel> at channel 0 on atapci0
ata3: <ATA channel> at channel 1 on atapci0
uart2: <Mobile 4 Series Chipset KT Controller> port 0x1830-0x1837 mem 0xfc324000-0xfc324fff irq 17 at device 3.3 on pci0
em0: <Intel(R) PRO/1000 Network Connection 7.6.1-k> port 0x1840-0x185f mem 0xfc100000-0xfc11ffff,0xfc325000-0xfc325fff irq 20 at device 25.0 on pci0
em0: Using an MSI interrupt
em0: Ethernet address: [_MAC_XXXXXXXXXX]
uhci0: <Intel 82801I (ICH9) USB controller> port 0x1860-0x187f irq 20 at device 26.0 on pci0
uhci0: LegSup = 0x2700
usbus0 on uhci0
uhci1: <Intel 82801I (ICH9) USB controller> port 0x1880-0x189f irq 21 at device 26.1 on pci0
uhci1: LegSup = 0x2700
usbus1 on uhci1
uhci2: <Intel 82801I (ICH9) USB controller> port 0x18a0-0x18bf irq 22 at device 26.2 on pci0
uhci2: LegSup = 0x2700
usbus2 on uhci2
ehci0: <Intel 82801I (ICH9) USB 2.0 controller> mem 0xfc326c00-0xfc326fff irq 23 at device 26.7 on pci0
usbus3: EHCI version 1.0
usbus3 on ehci0
hdac0: <Intel 82801I HDA Controller> mem 0xfc320000-0xfc323fff irq 17 at device 27.0 on pci0
pcib1: <ACPI PCI-PCI bridge> irq 20 at device 28.0 on pci0
pcib1: [GIANT-LOCKED]
pcib2: <ACPI PCI-PCI bridge> irq 21 at device 28.1 on pci0
pcib2: [GIANT-LOCKED]
pci1: <ACPI PCI bus> on pcib2
iwn0: <Intel WiFi Link 5100> mem 0xf4300000-0xf4301fff irq 17 at device 0.0 on pci1
pcib3: <ACPI PCI-PCI bridge> irq 22 at device 28.2 on pci0
pcib3: [GIANT-LOCKED]
pci2: <ACPI PCI bus> on pcib3
pci2: <memory> at device 0.0 (no driver attached)
pcib4: <ACPI PCI-PCI bridge> irq 23 at device 28.3 on pci0
pcib4: [GIANT-LOCKED]
pcib5: <ACPI PCI-PCI bridge> irq 20 at device 28.4 on pci0
pcib5: [GIANT-LOCKED]
uhci3: <Intel 82801I (ICH9) USB controller> port 0x18c0-0x18df irq 16 at device 29.0 on pci0
uhci3: LegSup = 0x2700
usbus4 on uhci3
uhci4: <Intel 82801I (ICH9) USB controller> port 0x18e0-0x18ff irq 17 at device 29.1 on pci0
uhci4: LegSup = 0x2700
usbus5 on uhci4
uhci5: <Intel 82801I (ICH9) USB controller> port 0x1c00-0x1c1f irq 18 at device 29.2 on pci0
uhci5: LegSup = 0x2700
usbus6 on uhci5
ehci1: <Intel 82801I (ICH9) USB 2.0 controller> mem 0xfc327000-0xfc3273ff irq 19 at device 29.7 on pci0
usbus7: EHCI version 1.0
usbus7 on ehci1
pcib6: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci3: <ACPI PCI bus> on pcib6
cbb0: <RF5C476 PCI-CardBus Bridge> mem 0xf4800000-0xf4800fff irq 16 at device 0.0 on pci3
cbb0: Found memory at f4800000
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
pci3: <serial bus, FireWire> at device 0.1 (no driver attached)
sdhci_pci0: <RICOH R5C822 SD> mem 0xf4801800-0xf48018ff irq 18 at device 0.2 on pci3
sdhci_pci0: 1 slot(s) allocated
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
ahci0: <Intel ICH9M AHCI SATA controller> port 0x1c48-0x1c4f,0x183c-0x183f,0x1c40-0x1c47,0x1838-0x183b,0x1c20-0x1c3f mem 0xfc326000-0xfc3267ff irq 16 at device 31.2 on pci0
ahci0: AHCI v1.20 with 4 3Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich1: <AHCI channel> at channel 1 on ahci0
acpi_tz0: <Thermal Zone> on acpi0
acpi_tz1: <Thermal Zone> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model Generic PS/2 mouse, device ID 0
battery0: <ACPI Control Method Battery> on acpi0
acpi_acad0: <AC Adapter> on acpi0
acpi_ibm0: <IBM ThinkPad ACPI Extras> on acpi0
pmtimer0 on isa0
orm0: <ISA Option ROMs> at iomem 0xc0000-0xcffff,0xd0000-0xd0fff,0xd1000-0xd1fff,0xd2000-0xd2fff,0xde000-0xdf7ff,0xe0000-0xeffff pnpid ORM0000 on isa0
ata0: <ATA channel> at port 0x1f0-0x1f7,0x3f6 irq 14 on isa0
ata1: <ATA channel> at port 0x170-0x177,0x376 irq 15 on isa0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
est1: <Enhanced SpeedStep Frequency Control> on cpu1
Timecounters tick every 10.000 msec
hdacc0: <Conexant CX20561 (Hermosa) HDA CODEC> at cad 0 on hdac0
hdaa0: <Conexant CX20561 (Hermosa) Audio Function Group> at nid 1 on hdacc0
pcm0: <Conexant CX20561 (Hermosa) (Analog 2.0+HP/3.1)> at nid 26,22 and 24,29 on hdaa0
hdacc1: <Conexant (0x2c06) HDA CODEC> at cad 1 on hdac0
unknown: <Conexant (0x2c06) HDA CODEC Modem Function Group> at nid 2 on hdacc1 (no driver attached)
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
usbus2: 12Mbps Full Speed USB v1.0
usbus3: 480Mbps High Speed USB v2.0
usbus4: 12Mbps Full Speed USB v1.0
usbus5: 12Mbps Full Speed USB v1.0
usbus6: 12Mbps Full Speed USB v1.0
usbus7: 480Mbps High Speed USB v2.0
ugen7.1: <Intel EHCI root HUB> at usbus7
uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus7
ugen6.1: <Intel UHCI root HUB> at usbus6
uhub1: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus6
ugen5.1: <Intel UHCI root HUB> at usbus5
uhub2: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus5
ugen4.1: <Intel UHCI root HUB> at usbus4
uhub3: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus4
ugen3.1: <Intel EHCI root HUB> at usbus3
uhub4: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus3
ugen2.1: <Intel UHCI root HUB> at usbus2
uhub5: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2
ugen1.1: <Intel UHCI root HUB> at usbus1
uhub6: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
ugen0.1: <Intel UHCI root HUB> at usbus0
uhub7: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
Status is 0x30000006
uhub7: 2 ports with 2 removable, self powered
uhub6: 2 ports with 2 removable, self powered
uhub5: 2 ports with 2 removable, self powered
uhub3: 2 ports with 2 removable, self powered
uhub2: 2 ports with 2 removable, self powered
uhub1: 2 ports with 2 removable, self powered
uhub0: 6 ports with 6 removable, self powered
uhub4: 6 ports with 6 removable, self powered
ada0 at ahcich0 bus 0 scbus2 target 0 lun 0
ada0: <WDC WD3200BEVS-08VAT1 13.01A13> ATA8-ACS SATA 1.x device
ada0: [_SERIAL_NUMBER_XXXXXXXXXXXX]
ada0: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 305245MB (625142448 512 byte sectors)
cd0 at ahcich1 bus 0 scbus3 target 0 lun 0
cd0: <MATSHITA DVD-RAM UJ862A SB04> Removable CD-ROM SCSI device
cd0: [_SERIAL_NUMBER_X] 210838
cd0: 150.000MB/s transfers (SATA 1.x, UDMA2, ATAPI 12bytes, PIO 8192bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
SMP: AP CPU #1 Launched!
Timecounter "TSC-low" frequency 1263527711 Hz quality 1000
WARNING: WITNESS option enabled, expect reduced performance.
Trying to mount root from ufs:/dev/ada0s1a [rw,noatime]...
WARNING: / was not properly dismounted
ugen7.2: <vendor 0x0b95 product 0x772b> at usbus7
ugen3.2: <Chicony Electronics Co., Ltd. Integrated Camera> at usbus3
ugen1.2: <vendor 0x08ff Fingerprint Sensor> at usbus1
ugen4.2: <vendor 0x1a86 USB2.0-Serial> at usbus4
ZFS NOTICE: KSTACK_PAGES is 2 which could result in stack overflow panic!
Please consider adding 'options KSTACK_PAGES=4' to your kernel config
ZFS NOTICE: Prefetch is disabled by default on i386 -- to enable,
            add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf.
ZFS WARNING: Recommended minimum kmem_size is 512MB; expect unstable behavior.
             Consider tuning vm.kmem_size and vm.kmem_size_max
             in /boot/loader.conf.
ZFS filesystem version: 5
ZFS storage pool version: features support (5000)
GEOM_ELI: Device ada0s1f.eli created.
GEOM_ELI: Encryption: AES-CBC 128
GEOM_ELI:     Crypto: software
WARNING: /usr was not properly dismounted
WARNING: /var was not properly dismounted
bridge0: Ethernet address: [_MAC_XXXXXXXXXX]
tap0: Ethernet address: [_MAC_XXXXXXXXXX]
em0: promiscuous mode enabled
bridge0: link state changed to UP
tap0: promiscuous mode enabled
bridge0: link state changed to DOWN
em0: link state changed to UP
bridge0: link state changed to UP
axe0 on uhub0
axe0: <vendor 0x0b95 product 0x772b, rev 2.00/0.01, addr 2> on usbus7
uchcom0 on uhub3
uchcom0: <vendor 0x1a86 USB2.0-Serial, rev 1.10/2.63, addr 2> on usbus4
uchcom0: CH341 detected
ipfw2 (+ipv6) initialized, divert loadable, nat loadable, default to deny, logging disabled
lock order reversal:
 1st 0xe2154f6c bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:3506
 2nd 0xc8eecddc snaplk (snaplk) @ /usr/src/sys/ufs/ffs/ffs_snapshot.c:2298
stack backtrace:
#0 0xc0caf051 at witness_debugger+0x81
#1 0xc0caef76 at witness_checkorder+0xd46
#2 0xc0c22502 at __lockmgr_args+0x482
#3 0xc0f1a4cf at ffs_copyonwrite+0x1cf
#4 0xc0f3b402 at ffs_geom_strategy+0x82
#5 0xc0cf2087 at bufwrite+0x1c7
#6 0xc0f3b1e4 at ffs_bufwrite+0x114
#7 0xc0f11346 at ffs_update+0x2f6
#8 0xc0f3d668 at ffs_syncvnode+0x528
#9 0xc0f3c4a6 at ffs_fsync+0x26
#10 0xc120bfc1 at VOP_FSYNC_APV+0xd1
#11 0xc0d23518 at kern_fsync+0x1d8
#12 0xc0d23602 at sys_fsync+0x22
#13 0xc11db1f2 at syscall+0x3b2
#14 0xc11c5f1e at Xint0x80_syscall+0x2e
miibus0: <MII bus> on axe0
ukphy0: <Generic IEEE 802.3u media interface> PHY 16 on miibus0
ukphy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto, auto-flow
ue0: <USB Ethernet> on axe0
ue0: Ethernet address: [_MAC_XXXXXXXXXX]
ue0: link state changed to DOWN
lock order reversal:
 1st 0xe215a948 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:3506
 2nd 0xc787ea00 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:281
stack backtrace:
#0 0xc0caf051 at witness_debugger+0x81
#1 0xc0caef76 at witness_checkorder+0xd46
#2 0xc0c55730 at _sx_xlock+0x70
#3 0xc0f422e0 at ufsdirhash_add+0x40
#4 0xc0f45087 at ufs_direnter+0x4b7
#5 0xc0f4de99 at ufs_mkdir+0x809
#6 0xc120c601 at VOP_MKDIR_APV+0xd1
#7 0xc0d23ed4 at kern_mkdirat+0x234
#8 0xc0d23c91 at sys_mkdir+0x31
#9 0xc11db1f2 at syscall+0x3b2
#10 0xc11c5f1e at Xint0x80_syscall+0x2e
lock order reversal:
 1st 0xc1b603a0 pcbinfohash (pcbinfohash) @ /usr/src/sys/netinet6/udp6_usrreq.c:1274
 2nd 0xc1b5f59c PFil shared rmlock (PFil shared rmlock) @ /usr/src/sys/net/pfil.c:78
stack backtrace:
#0 0xc0caf051 at witness_debugger+0x81
#1 0xc0caef76 at witness_checkorder+0xd46
#2 0xc0c47457 at _rm_rlock_debug+0x107
#3 0xc0d5cc26 at pfil_run_hooks+0x46
#4 0xc0e7b4f7 at ip6_output+0x18f7
#5 0xc0e973e9 at udp6_send+0x779
#6 0xc0cdf1cf at sosend_dgram+0x39f
#7 0xc0ed1507 at clnt_dg_call+0x627
#8 0xc0ed6eed at clnt_call_private+0xbd
#9 0xc0ebd209 at nlm_get_rpc+0x189
#10 0xc0ebd9e4 at sys_nlm_syscall+0x114
#11 0xc11db1f2 at syscall+0x3b2
#12 0xc11c5f1e at Xint0x80_syscall+0x2e
lock order reversal:
 1st 0xca2b7388 ufs (ufs) @ /usr/src/sys/kern/vfs_syscalls.c:3384
 2nd 0xe2260cd4 bufwait (bufwait) @ /usr/src/sys/ufs/ffs/ffs_vnops.c:277
 3rd 0xc976fd84 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2592
stack backtrace:
#0 0xc0caf051 at witness_debugger+0x81
#1 0xc0caef76 at witness_checkorder+0xd46
#2 0xc0c22502 at __lockmgr_args+0x482
#3 0xc0f3c614 at ffs_lock+0x84
#4 0xc120d0d7 at VOP_LOCK1_APV+0xd7
#5 0xc0d270c6 at _vn_lock+0x96
#6 0xc0d15634 at vget+0x64
#7 0xc0d077f1 at vfs_hash_get+0xd1
#8 0xc0f378d7 at ffs_vgetf+0x47
#9 0xc0f2dcc1 at softdep_sync_buf+0xb01
#10 0xc0f3d41f at ffs_syncvnode+0x2df
#11 0xc0f3c4a6 at ffs_fsync+0x26
#12 0xc120bfc1 at VOP_FSYNC_APV+0xd1
#13 0xc0d23518 at kern_fsync+0x1d8
#14 0xc0d23602 at sys_fsync+0x22
#15 0xc11db1f2 at syscall+0x3b2
#16 0xc11c5f1e at Xint0x80_syscall+0x2e
lock order reversal:
 1st 0xca4b705c snaplk (snaplk) @ /usr/src/sys/kern/vfs_vnops.c:442
 2nd 0xc94104a4 ufs (ufs) @ /usr/src/sys/ufs/ffs/ffs_snapshot.c:1629
stack backtrace:
#0 0xc0caf051 at witness_debugger+0x81
#1 0xc0caef76 at witness_checkorder+0xd46
#2 0xc0c22502 at __lockmgr_args+0x482
#3 0xc0f18533 at ffs_snapremove+0x113
#4 0xc0f11694 at ffs_truncate+0x2a4
#5 0xc0f435ea at ufs_inactive+0x1ea
#6 0xc120cdc1 at VOP_INACTIVE_APV+0xd1
#7 0xc0d15922 at vinactive+0xf2
#8 0xc0d15e91 at vputx+0x321
#9 0xc0d2722c at vn_close+0xfc
#10 0xc0d25e5f at vn_closefile+0x4f
#11 0xc0bf5fb1 at _fdrop+0x21
#12 0xc0bf92fe at closef+0x21e
#13 0xc0bf669c at closefp+0xac
#14 0xc0bf7010 at kern_close+0x120
#15 0xc0bf6eea at sys_close+0x1a
#16 0xc11db1f2 at syscall+0x3b2
#17 0xc11c5f1e at Xint0x80_syscall+0x2e
ugen4.2: <vendor 0x1a86 USB2.0-Serial> at usbus4 (disconnected)
uchcom0: at uhub3, port 2, addr 2 (disconnected)
uchcom0: detached