GENERIC HEAD from Mar 25 12:55 UTC, vmcore.505
Pty/devfs related panic.

GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2006 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 7.0-CURRENT #2: Sat Mar 25 15:28:50 CET 2006
    pho@current.osted.lan:/usr/src/sys/i386/compile/PHO
WARNING: WITNESS option enabled, expect reduced performance.
ACPI APIC Table: <A M I  OEMAPIC >
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Celeron(R) CPU 1.80GHz (1799.15-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf13  Stepping = 3
  Features=0x3febfbff<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>
real memory  = 267583488 (255 MB)
avail memory = 252137472 (240 MB)
:
Trying to mount root from ufs:/dev/ad0s1a
rl0: link state changed to DOWN
Limiting icmp unreach response from 6715 to 200 packets/sec
Limiting icmp unreach response from 2370 to 200 packets/sec
:
Limiting icmp unreach response from 10451 to 200 packets/sec
Limiting icmp unreach response from 9211 to 200 packets/sec
VNASSERT failed
0xc2e95c30: tag none, type VBAD
    usecount 0, writecount 0, refcount 1 mountedhere 0
    flags (VI_DOOMED)
 VI_LOCKed
panic: No vop_lock(0xc2e95c30, 0xcd45f794)
cpuid = 0
KDB: enter: panic
[thread pid 7636 tid 100162 ]
Stopped at      kdb_enter+0x2b: nop
db> where
Tracing pid 7636 tid 100162 td 0xc2ba61b0
kdb_enter(c089bf32) at kdb_enter+0x2b
panic(c08c61d4,c2e95c30,cd45f794,c2e95c30,c08a4e9a) at panic+0x14b
VOP_LOCK_APV(0,cd45f794) at VOP_LOCK_APV+0x73
vn_lock(c2e95c30,2002,c2ba61b0,c2e95c30,2) at vn_lock+0xa8
vget(c2e95c30,2,c2ba61b0) at vget+0xba
devfs_allocv(c23ae980,c23d9000,cd45fb90,c2ba61b0,c0969190) at devfs_allocv+0x37
devfs_lookupx(cd45f974,c23ce490,c0894142,239,c0923900) at devfs_lookupx+0x4a6
devfs_lookup(cd45f974,c23f5000,0,cd45f990,c06bb3ce) at devfs_lookup+0x2d
VOP_LOOKUP_APV(c0923900,cd45f974) at VOP_LOOKUP_APV+0x87
lookup(cd45fb7c,c06c24ae,0,c2ba61b0,c08a5cf8) at lookup+0x402
namei(cd45fb7c,c089d8df,26e,c2ba61b0,cd45fa18) at namei+0x382
vn_open_cred(cd45fb7c,cd45fc7c,0,c376ea80,3) at vn_open_cred+0x277
vn_open(cd45fb7c,cd45fc7c,0,3,cd45fb10) at vn_open+0x1e
kern_open(c2ba61b0,bfbfe150,0,3,0) at kern_open+0xb9
open(c2ba61b0,cd45fd04,cd45fccc,c066ec40,c2ba61b0) at open+0x18
syscall(bfbf003b,ffff003b,bfbf003b,bfbfe15b,ffffffff) at syscall+0x27e
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (5, FreeBSD ELF32, open), eip = 0x281440ab, esp = 0xbfbfe11c, ebp = 0xbfbfe178 ---
db> show pcpu
cpuid        = 0
curthread    = 0xc2ba61b0: pid 7636 "pty"
curpcb       = 0xcd45fd90
fpcurthread  = none
idlethread   = 0xc21bd510: pid 10 "idle: cpu0"
APIC ID      = 0
currentldt   = 0x50
spin locks held:
db> show alllocks
Process 7636 (pty) thread 0xc2ba61b0 (100162)
exclusive sleep mutex vnode interlock r = 0 (0xc2e95cac) locked @ kern/vfs_subr.c:1945
exclusive sx devfsmount r = 0 (0xc23ce490) locked @ fs/devfs/devfs_vnops.c:569
db> show lockedvnods
Locked vnodes

0xc23f4c30: tag ufs, type VDIR
    usecount 76, writecount 0, refcount 78 mountedhere 0
    flags (VV_ROOT)
    v_object 0xc1042bb8 ref 0 pages 1
     lock type ufs: EXCL (count 1) by thread 0xc26c6510 (pid 7637)
        ino 2, on dev ad0s1a

0xc23f4820: tag ufs, type VDIR
    usecount 1, writecount 0, refcount 5 mountedhere 0
    flags ()
    v_object 0xc26c84b0 ref 0 pages 1
     lock type ufs: EXCL (count 1) by thread 0xc24a41b0 (pid 7638) with 1 pending
        ino 24769, on dev ad0s1a

0xc23f5000: tag devfs, type VDIR
    usecount 3, writecount 0, refcount 5 mountedhere 0
    flags (VV_ROOT)
     lock type devfs: EXCL (count 1) by thread 0xc2ba61b0 (pid 7636) with 2 pending

0xc2427820: tag ufs, type VDIR
    usecount 2, writecount 0, refcount 3 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc26c7bd0 (pid 7633)
        ino 98195, on dev ad0s1e

0xc33f430c: tag ufs, type VDIR
    usecount 2, writecount 0, refcount 3 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc24031b0 (pid 7629)
        ino 51335, on dev ad0s1e

0xc2e1e514: tag ufs, type VDIR
    usecount 2, writecount 0, refcount 3 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc380d000 (pid 7632)
        ino 121993, on dev ad0s1e

0xc2b6fa28: tag ufs, type VDIR
    usecount 2, writecount 0, refcount 3 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc24a4870 (pid 7630)
        ino 1832, on dev ad0s1e

0xc273f924: tag ufs, type VDIR
    usecount 2, writecount 0, refcount 3 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc24a4510 (pid 7631)
        ino 74442, on dev ad0s1e

0xc245b924: tag ufs, type VDIR
    usecount 2, writecount 0, refcount 3 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc3a58bd0 (pid 7634)
        ino 27769, on dev ad0s1e
db> where 7637
Tracing pid 7637 tid 100118 td 0xc26c6510
sched_switch(c26c6510,0,1) at sched_switch+0x183
mi_switch(1,0) at mi_switch+0x280
sleepq_switch(c23f4878,c0969190,0,c089eee0,212) at sleepq_switch+0xcd
sleepq_wait(c23f4878,0,c23f489c,b2,c0899d91) at sleepq_wait+0x46
msleep(c23f4878,c0968ce0,50,c08a3b5e,0) at msleep+0x279
acquire(cd396914,40,60000,c26c6510,0) at acquire+0x76
lockmgr(c23f4878,2002,c23f489c,c26c6510,cd396938) at lockmgr+0x44a
vop_stdlock(cd39697c,c093f680,cd39697c,cd396948,c07a2f9c) at vop_stdlock+0x1e
VOP_LOCK_APV(c093fbc0,cd39697c,cd39695c,c0837a33,cd39697c) at VOP_LOCK_APV+0x87
ffs_lock(cd39697c,2002,c23f4820,cd396998,c06cdf48) at ffs_lock+0x10
VOP_LOCK_APV(c093f680,cd39697c) at VOP_LOCK_APV+0x87
vn_lock(c23f4820,2002,c26c6510,c23f4820,2002) at vn_lock+0xa8
vget(c23f4820,2002,c26c6510,cd396a08,c0836297) at vget+0xba
cache_lookup(c23f4c30,cd396bbc,cd396bd0) at cache_lookup+0x348
vfs_cache_lookup(cd396abc,c23f4c30,cd396bd0,cd396ad8,c06bb3ce) at vfs_cache_lookup+0x8f
VOP_LOOKUP_APV(c093f680,cd396abc) at VOP_LOOKUP_APV+0x87
lookup(cd396ba8,c26c6510,0,c26c6510,cd396b0c) at lookup+0x402
namei(cd396ba8,c0968848,1,c26c6510,0) at namei+0x382
kern_stat(c26c6510,2815a4f4,0,cd396c1c) at kern_stat+0x35
stat(c26c6510,cd396d04,c096aba0,c21bd850,0) at stat+0x1b
syscall(bfbf003b,ffff003b,bfbf003b,0,a0014f0) at syscall+0x27e
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (188, FreeBSD ELF32, stat), eip = 0x2814404b, esp = 0xbfbfdf7c, ebp = 0xbfbfe058 ---
db> where 7638
Tracing pid 7638 tid 100106 td 0xc24a41b0
sched_switch(c24a41b0,0,1) at sched_switch+0x183
mi_switch(1,0) at mi_switch+0x280
sleepq_switch(c09b6098,c0969190,0,c089eee0,237) at sleepq_switch+0xcd
sleepq_timedwait(c09b6098,0,c08a5d01,359,8) at sleepq_timedwait+0x4a
msleep(c09b6098,c09b6038,50,c08a5f15,3e8) at msleep+0x253
getnewvnode(c08a3b5e,c23d8c00,c093f680,cd33c914,cd33c8ec) at getnewvnode+0x84
ffs_vget(c23d8c00,62a1,2,cd33c978) at ffs_vget+0xc2
ufs_lookup(cd33ca20,c23f4820,cd33cbd0,cd33ca5c,c06b71fa) at ufs_lookup+0xaa2
VOP_CACHEDLOOKUP_APV(c093f680,cd33ca20) at VOP_CACHEDLOOKUP_APV+0x9b
vfs_cache_lookup(cd33cabc,c23f4820,0,cd33cad8,c06bb3ce) at vfs_cache_lookup+0xb2
VOP_LOOKUP_APV(c093f680,cd33cabc) at VOP_LOOKUP_APV+0x87
lookup(cd33cba8,c24a41b0,0,c24a41b0,cd33cb0c) at lookup+0x402
namei(cd33cba8,c0968848,1,c24a41b0,0) at namei+0x382
kern_stat(c24a41b0,2815a4f4,0,cd33cc1c) at kern_stat+0x35
stat(c24a41b0,cd33cd04,cd33cccc,c066ec40,c24a41b0) at stat+0x1b
syscall(2805003b,bfbf003b,bfbf003b,0,a0014f0) at syscall+0x27e
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (188, FreeBSD ELF32, stat), eip = 0x2814404b, esp = 0xbfbfdf7c, ebp = 0xbfbfe058 ---
db> ps
  pid   proc     uid  ppid  pgrp  flag   stat  wmesg    wchan  cmd
 7638 c26c5234 1001  7627  7286 0000002 [SLPQ vlruwk 0xc09b6098][SLP] pty
 7637 c3a31d38 1001  7627  7286 0000002 [SLPQ ufs 0xc23f4878][SLP] pty
 7636 c3809234 1001  7627  7286 0000002 [CPU 0] pty
 7635 c380b69c 1001  7627  7286 0000002 [SLPQ devfs 0xc23f5058][SLP] pty
 7634 c38098d0 1001  7626  7286 0000002 [SLPQ vlruwk 0xc09b6098][SLP] mkdir
 7633 c3a568d0 1001  7626  7286 0000002 [SLPQ vlruwk 0xc09b6098][SLP] mkdir
 7632 c38428d0 1001  7626  7286 0000002 [SLPQ vlruwk 0xc09b6098][SLP] mkdir
 7631 c26c4d38 1001  7626  7286 0000002 [SLPQ vlruwk 0xc09b6098][SLP] mkdir
 7630 c26c48d0 1001  7626  7286 0000002 [SLPQ vlruwk 0xc09b6098][SLP] mkdir
 7629 c24a2000 1001  7626  7286 0000002 [SLPQ vlruwk 0xc09b6098][SLP] mkdir
 7628 c24a18d0 1001  7627  7286 0000002 [SLPQ devfs 0xc23f5058][SLP] pty
 7627 c384169c 1001  7617  7286 0000002 [SLPQ wait 0xc384169c][SLP] pty
 7626 c2664000 1001  7610  7286 0000002 [SLPQ wait 0xc2664000][SLP] mkdir
 7617 c2664d38 1001  7293  7286 0004002 [SLPQ nanslp 0xc0969a64][SLP] pty
 7610 c3a5669c 1001  7293  7286 0004002 [SLPQ nanslp 0xc0969a64][SLP] mkdir
 7293 c380969c 1001  7292  7286 0000002 [SLPQ wait 0xc380969c][SLP] run
 7292 c2acb8d0 1001  7291  7286 0000002 [SLPQ wait 0xc2acb8d0][SLP][SWAP] run
 7291 c3841d38 1001  7286  7286 0004002 [SLPQ nanslp 0xc0969a64][SLP] run
 7286 c2664b04 1001  3783  7286 0004002 [SLPQ wait 0xc2664b04][SLP][SWAP] sh
 3783 c2667d38 1001  3782  3783 0004002 [SLPQ wait 0xc2667d38][SLP][SWAP] bash
 3782 c2402b04 1001  3780  3780 0000100 [SLPQ select 0xc09b58fc][SLP] sshd
 3780 c2664468    0   459  3780 0004100 [SLPQ sbwait 0xc24b01e8][SLP][SWAP] sshd
  587 c2667000    0     1   587 0004002 [SLPQ ttyin 0xc2341c10][SLP][SWAP] getty
  586 c24a1d38    0     1   586 0004002 [SLPQ ttyin 0xc2342010][SLP][SWAP] getty
  585 c24a1b04    0     1   585 0004002 [SLPQ ttyin 0xc2342410][SLP][SWAP] getty
  584 c24a2d38    0     1   584 0004002 [SLPQ ttyin 0xc2338410][SLP][SWAP] getty
  583 c24a2468    0     1   583 0004002 [SLPQ ttyin 0xc2328810][SLP][SWAP] getty
  582 c2402d38    0     1   582 0004002 [SLPQ ttyin 0xc233ac10][SLP][SWAP] getty
  581 c24a28d0    0     1   581 0004002 [SLPQ ttyin 0xc2339410][SLP][SWAP] getty
  580 c24a1234    0     1   580 0004002 [SLPQ ttyin 0xc2338810][SLP][SWAP] getty
  563 c24a2b04    0     1   563 0000000 [SLPQ select 0xc09b58fc][SLP] inetd
  534 c23df69c    0     1   534 0000000 [SLPQ select 0xc09b58fc][SLP][SWAP] moused
  475 c2402000    0     1   475 0000000 [SLPQ nanslp 0xc0969a64][SLP] cron
  469 c24a169c   25     1   469 0000100 [SLPQ pause 0xc24a16d0][SLP][SWAP] sendmail
  465 c24a269c    0     1   465 0000100 [SLPQ select 0xc09b58fc][SLP] sendmail
  459 c24a2234    0     1   459 0000100 [SLPQ select 0xc09b58fc][SLP][SWAP] sshd
  439 c24a1000    0     1   439 0000000 [SLPQ select 0xc09b58fc][SLP] ntpd
  389 c23df234    0   384   384 0000000 [SLPQ - 0xc249e600][SLP][SWAP] nfsd
  388 c24028d0    0   384   384 0000000 [SLPQ - 0xc249e800][SLP][SWAP] nfsd
  387 c240269c    0   384   384 0000000 [SLPQ - 0xc249ea00][SLP][SWAP] nfsd
  386 c23dfb04    0   384   384 0000000 [SLPQ - 0xc249e400][SLP][SWAP] nfsd
  384 c2402234    0     1   384 0000000 [SLPQ select 0xc09b58fc][SLP][SWAP] nfsd
  382 c2402468    0     1   382 0000000 [SLPQ select 0xc09b58fc][SLP][SWAP] mountd
  314 c23df8d0    0     1   314 0000000 [SLPQ select 0xc09b58fc][SLP] rpcbind
  298 c23dfd38    0     1   298 0000000 [SLPQ select 0xc09b58fc][SLP] syslogd
  263 c23df468    0     1   263 0000000 [SLPQ select 0xc09b58fc][SLP][SWAP] devd
   50 c22f669c    0     0     0 0000204 [SLPQ - 0xcc9b1d04][SLP] schedcpu
   49 c22f68d0    0     0     0 0000204 [SLPQ - 0xc09bd66c][SLP] nfsiod 3
   48 c22f6b04    0     0     0 0000204 [SLPQ - 0xc09bd668][SLP] nfsiod 2
   47 c22f6d38    0     0     0 0000204 [SLPQ - 0xc09bd664][SLP] nfsiod 1
   46 c23db000    0     0     0 0000204 [SLPQ - 0xc09bd660][SLP] nfsiod 0
   45 c23db234    0     0     0 0000204 [SLPQ sdflush 0xc09c2bc0][SLP] softdepflush
   44 c23db468    0     0     0 0000204 [SLPQ syncer 0xc0969770][SLP] syncer
   43 c23db69c    0     0     0 0000204 [SLPQ vlrup 0xc23db69c][SLP] vnlru
   42 c23db8d0    0     0     0 0000204 [SLPQ psleep 0xc09b5d6c][SLP] bufdaemon
   41 c23dbb04    0     0     0 000020c [SLPQ pgzero 0xc09cb4f0][SLP] pagezero
   40 c23dbd38    0     0     0 0000204 [SLPQ psleep 0xc09c341c][SLP] vmdaemon
   39 c23df000    0     0     0 0000204 [SLPQ psleep 0xc09c33dc][SLP] pagedaemon
   38 c229dd38    0     0     0 0000204 [IWAIT] irq7: ppc0
   37 c22f3000    0     0     0 0000204 [SLPQ - 0xc22e3c3c][SLP] fdc0
   36 c22f3234    0     0     0 0000204 [IWAIT] swi0: sio
   35 c22f3468    0     0     0 0000204 [IWAIT] irq12: psm0
   34 c22f369c    0     0     0 0000204 [IWAIT] irq1: atkbd0
   33 c22f38d0    0     0     0 0000204 [IWAIT] irq17: pcm0
   32 c22f3b04    0     0     0 0000204 [IWAIT] irq15: ata1
   31 c22f3d38    0     0     0 0000204 [IWAIT] irq14: ata0
   30 c22f6000    0     0     0 0000204 [IWAIT] irq22: rl0
   29 c22f6234    0     0     0 0000204 [SLPQ usbevt 0xc2289a10][SLP] usb4
   28 c22f6468    0     0     0 0000204 [IWAIT] irq23: ehci0
   27 c220769c    0     0     0 0000204 [SLPQ usbevt 0xc22d7210][SLP] usb3
   26 c22078d0    0     0     0 0000204 [SLPQ usbevt 0xc22d8210][SLP] usb2
   25 c2207b04    0     0     0 0000204 [IWAIT] irq18: uhci2
   24 c2207d38    0     0     0 0000204 [SLPQ usbevt 0xc22c9210][SLP] usb1
   23 c229d000    0     0     0 0000204 [IWAIT] irq19: uhci1
   22 c229d234    0     0     0 0000204 [SLPQ usbtsk 0xc0966f64][SLP] usbtask
   21 c229d468    0     0     0 0000204 [SLPQ usbevt 0xc2294210][SLP] usb0
   20 c229d69c    0     0     0 0000204 [IWAIT] irq16: uhci0 uhci3
   19 c229d8d0    0     0     0 0000204 [IWAIT] irq9: acpi0
    9 c229db04    0     0     0 0000204 [SLPQ - 0xc21f0400][SLP] thread taskq
   18 c21c1234    0     0     0 0000204 [IWAIT] swi6: Giant taskq
    8 c21c1468    0     0     0 0000204 [SLPQ - 0xc21f0580][SLP] acpi_task_2
    7 c21c169c    0     0     0 0000204 [SLPQ - 0xc21f0580][SLP] acpi_task_1
    6 c21c18d0    0     0     0 0000204 [SLPQ - 0xc21f0580][SLP] acpi_task_0
   17 c21c1b04    0     0     0 0000204 [IWAIT] swi6: task queue
    5 c21c1d38    0     0     0 0000204 [SLPQ - 0xc21f0700][SLP] kqueue taskq
   16 c2207000    0     0     0 0000204 [IWAIT] swi2: cambio
   15 c2207234    0     0     0 0000204 [IWAIT] swi5: +
   14 c2207468    0     0     0 0000204 [SLPQ - 0xc0964bc0][SLP] yarrow
    4 c21bc000    0     0     0 0000204 [SLPQ - 0xc09676dc][SLP] g_down
    3 c21bc234    0     0     0 0000204 [SLPQ - 0xc09676d8][SLP] g_up
    2 c21bc468    0     0     0 0000204 [SLPQ - 0xc09676d0][SLP] g_event
   13 c21bc69c    0     0     0 0000204 [IWAIT] swi1: net
   12 c21bc8d0    0     0     0 0000204 [IWAIT] swi3: vm
   11 c21bcb04    0     0     0 000020c [RUNQ] swi4: clock sio
   10 c21bcd38    0     0     0 000020c [Can run] idle: cpu0
    1 c21c1000    0     0     1 0004200 [SLPQ wait 0xc21c1000][SLP] init
    0 c09677e0    0     0     0 0000200 [IWAIT] swapper
 7622 c3a3269c 1001  7293  7286 0006002 zomb[INACTIVE] thr2
 7611 c3842468 1001  7293  7286 0006002 zomb[INACTIVE] thr1
 7614 c2acb000 1001  7293  7286 0006002 zomb[INACTIVE] sysctl
 7618 c380bd38 1001  7293  7286 0006002 zomb[INACTIVE] mkfifo
 7613 c3a32b04 1001  7293  7286 0006002 zomb[INACTIVE] syscall
 7620 c380b8d0 1001  7293  7286 0006002 zomb[INACTIVE] lockf
 7621 c26c469c 1001  7293  7286 0006002 zomb[INACTIVE] symlink
 7624 c26c569c 1001  7293  7286 0006002 zomb[INACTIVE] mmap
 7616 c3a56234 1001  7293  7286 0006002 zomb[INACTIVE] udp
 7619 c266769c 1001  7293  7286 0006002 zomb[INACTIVE] shm
 7625 c380bb04 1001  7293  7286 0006002 zomb[INACTIVE] socket
 7612 c380b234 1001  7293  7286 0006002 zomb[INACTIVE] rw
 7615 c2ba5000 1001  7293  7286 0006002 zomb[INACTIVE] tcp
 7623 c26668d0 1001  7293  7286 0006002 zomb[INACTIVE] badcode
db> call doadump
Dumping 254 MB (2 chunks)
  chunk 0: 1MB (159 pages) ... ok
  chunk 1: 255MB (65072 pages) 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15 ... ok

Dump complete
= 0xf
db> reset

(kgdb) bt
#0  doadump () at pcpu.h:166
#1  0xc046bfa7 in db_fncall (dummy1=0xcd45f588, dummy2=0x0, dummy3=0xc09e8a40, dummy4=0xcd45f564 "tExE\220\a")
    at ../../../ddb/db_command.c:479
#2  0xc046bdb8 in db_command (last_cmdp=0xc0950164, cmd_table=0x0) at ../../../ddb/db_command.c:395
#3  0xc046be76 in db_command_loop () at ../../../ddb/db_command.c:446
#4  0xc046da8d in db_trap (type=0x3, code=0x0) at ../../../ddb/db_main.c:228
#5  0xc0682cbc in kdb_trap (type=0x3, code=0x0, tf=0xcd45f6f0) at ../../../kern/subr_kdb.c:485
#6  0xc0824e10 in trap (frame=
      {tf_fs = 0xcd450008, tf_es = 0xc0680028, tf_ds = 0xc0890028, tf_edi = 0xc08c61d4, tf_esi = 0x1, tf_ebp = 0xcd45f730, tf_isp = 0xcd45f71c, tf_ebx = 0xcd45f75c, tf_edx = 0x0, tf_ecx = 0xc1033000, tf_eax = 0x12, tf_trapno = 0x3, tf_err = 0x0, tf_eip = 0xc06829c3, tf_cs = 0x20, tf_eflags = 0x296, tf_esp = 0xcd45f750, tf_ss = 0xc066825b}) at ../../../i386/i386/trap.c:622
#7  0xc081130a in calltrap () at ../../../i386/i386/exception.s:137
#8  0xc06829c3 in kdb_enter (msg=0x12 <Address 0x12 out of bounds>) at cpufunc.h:60
#9  0xc066825b in panic (fmt=0xc08c61d4 "No vop_lock(%p, %p)") at ../../../kern/kern_shutdown.c:552
#10 0xc0837a1f in VOP_LOCK_APV (vop=0x0, a=0xcd45f794) at vnode_if.c:1609
#11 0xc06cdf48 in vn_lock (vp=0xc2e95c30, flags=0x2002, td=0xc2ba61b0) at vnode_if.h:844
#12 0xc06c1ec6 in vget (vp=0xc2e95c30, flags=0x2, td=0xc2ba61b0) at ../../../kern/vfs_subr.c:1961
#13 0xc061ca13 in devfs_allocv (de=0xc23ae980, mp=0xc23d9000, vpp=0xcd45fb90, td=0xc2ba61b0) at ../../../fs/devfs/devfs_vnops.c:137
#14 0xc061d86e in devfs_lookupx (ap=0x12) at ../../../fs/devfs/devfs_vnops.c:558
#15 0xc061d8a5 in devfs_lookup (ap=0xcd45f974) at ../../../fs/devfs/devfs_vnops.c:570
#16 0xc0835af3 in VOP_LOOKUP_APV (vop=0xc0923900, a=0xcd45f974) at vnode_if.c:97
#17 0xc06bb3ce in lookup (ndp=0xcd45fb7c) at vnode_if.h:56
#18 0xc06bad6a in namei (ndp=0xcd45fb7c) at ../../../kern/vfs_lookup.c:211
#19 0xc06ccfcf in vn_open_cred (ndp=0xcd45fb7c, flagp=0xcd45fc7c, cmode=0x0, cred=0xc376ea80, fdidx=0x3)
    at ../../../kern/vfs_vnops.c:183
#20 0xc06ccd56 in vn_open (ndp=0x0, flagp=0xcd45fc7c, cmode=0x0, fdidx=0x3) at ../../../kern/vfs_vnops.c:91
#21 0xc06c617d in kern_open (td=0xc2ba61b0, path=0x12 <Address 0x12 out of bounds>, pathseg=18, flags=0x3, mode=0x0)
    at ../../../kern/vfs_syscalls.c:995
#22 0xc06c60c0 in open (td=0xc2ba61b0, uap=0x12) at ../../../kern/vfs_syscalls.c:962
#23 0xc0825676 in syscall (frame=
      {tf_fs = 0xbfbf003b, tf_es = 0xffff003b, tf_ds = 0xbfbf003b, tf_edi = 0xbfbfe15b, tf_esi = 0xffffffff, tf_ebp = 0xbfbfe178, tf_isp = 0xcd45fd64, tf_ebx = 0x28091ea0, tf_edx = 0x28090240, tf_ecx = 0x281610a8, tf_eax = 0x5, tf_trapno = 0x0, tf_err = 0x2, tf_eip = 0x281440ab, tf_cs = 0x33, tf_eflags = 0x202, tf_esp = 0xbfbfe11c, tf_ss = 0x3b}) at ../../../i386/i386/trap.c:1016
#24 0xc081135f in Xint0x80_syscall () at ../../../i386/i386/exception.s:190
#25 0x00000033 in ?? ()
(kgdb) f 13
#13 0xc061ca13 in devfs_allocv (de=0xc23ae980, mp=0xc23d9000, vpp=0xcd45fb90, td=0xc2ba61b0) at ../../../fs/devfs/devfs_vnops.c:137
137                     if (vget(vp, LK_EXCLUSIVE, td))
(kgdb) l
132
133             KASSERT(td == curthread, ("devfs_allocv: td != curthread"));
134     loop:
135             vp = de->de_vnode;
136             if (vp != NULL) {
137                     if (vget(vp, LK_EXCLUSIVE, td))
138                             goto loop;
139                     *vpp = vp;
140                     return (0);
141             }
(kgdb) info loc
error = 0xc23f5000
vp = (struct vnode *) 0xc2e95c30
dev = (struct cdev *) 0xc23ae9e0
__func__ = "devfs_allocv"
(kgdb) p *de
$4 = {de_cdp = 0xc3d68700, de_inode = 0x93, de_flags = 0x0, de_dirent = 0xc23ae9d8, de_list = {tqe_next = 0xc3590280,
    tqe_prev = 0xc3880a10}, de_dlist = {tqh_first = 0x0, tqh_last = 0x0}, de_dir = 0xc23ce200, de_links = 0x1, de_mode = 0x1b6,
  de_uid = 0x0, de_gid = 0x0, de_label = 0x0, de_atime = {tv_sec = 0x44266424, tv_nsec = 0x0}, de_mtime = {tv_sec = 0x44266424,
    tv_nsec = 0x0}, de_ctime = {tv_sec = 0x44266424, tv_nsec = 0x0}, de_vnode = 0x0, de_symlink = 0x0}
(kgdb) p de->de_vnode
$6 = (struct vnode *) 0x0