From owner-freebsd-current  Thu Oct 24 19: 9:37 2002
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Date: Thu, 24 Oct 2002 19:09:08 -0700 (PDT)
From: Lamont Granquist <lamont@scriptkiddie.org>
To: freebsd-current@freebsd.org
Subject: mi_switch deadlock? 
Message-ID: <20021024190841.E2439-100000@coredump.scriptkiddie.org>
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my -current box keeps freezing about every 24h.  i broke into the kernel
and forced a panic and found lots of processes stuck in mi_switch().

my uname is a build from tuesday running on an SMP machine:

uname -a
FreeBSD coredump.scriptkiddie.org 5.0-CURRENT FreeBSD 5.0-CURRENT #16: Tue
Oct 22 19:42:51 PDT 2002 lamont@coredump.scriptkiddie.org:/usr/obj/usr/src/sys/COREDUMP  i386

i can get more information if anyone needs it...

Script started on Thu Oct 24 18:58:57 2002
You have mail.
coredump# gdb -k kernel.debug /var/crash/vmcore.4
GNU gdb 5.2.1 (FreeBSD)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-undermydesk-freebsd"...
panic: bremfree: bp 0xce62a48c not locked
panic messages:
---
panic: lockmgr: pid 8272, not exclusive lock holder 7858 unlocking
panic: from debugger
Uptime: 4h30m13s
pfs_vncache_unload(): 1 entries remaining
Dumping 511 MB
ata0: resetting devices ..
done
 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 368 384 400 416 432 448 464 480 496Copyright (c) 1992-2002 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 5.0-CURRENT #16: Tue Oct 22 19:42:51 PDT 2002
    lamont@coredump.scriptkiddie.org:/usr/obj/usr/src/sys/COREDUMP
Preloaded elf kernel "/boot/kernel/kernel" at 0xc06a5000.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc06a50a8.
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 1400057705 Hz
CPU: AMD Athlon(TM) XP 1600+ (1400.06-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x662  Stepping = 2
  Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
  AMD Features=0xffffffffc0480000<MP,AMIE,DSP,3DNow!>
real memory  = 536788992 (524208K bytes)
avail memory = 513298432 (501268K bytes)
Initializing GEOMetry subsystem
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <ASUS   A7M266-D> on motherboard
Using $PIR table, 9 entries at 0xc00f1370
acpi0: power button is handled as a fixed feature programming model.
acpi0: sleep button is handled as a fixed feature programming model.
Timecounter "ACPI-fast"  frequency 3579545 Hz
acpi_timer0: <24-bit timer at 3.579545MHz> port 0xe408-0xe40b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_cpu1: <CPU> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
---- initial configuration ------------------------
---- before setting priority for links ------------
---- before fixup boot-disabled links -------------
---- after fixup boot-disabled links --------------
---- arbitrated configuration ---------------------
pci0: <ACPI PCI bus> on pcib0
agp0: <AMD 762 host to AGP bridge> port 0xe800-0xe803 mem 0xfb800000-0xfb800fff,0xfc000000-0xfdffffff at device 0.0 on pci0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
---- initial configuration ------------------------
---- before setting priority for links ------------
---- before fixup boot-disabled links -------------
---- after fixup boot-disabled links --------------
---- arbitrated configuration ---------------------
pci1: <ACPI PCI bus> on pcib1
pci1: <display, VGA> at device 5.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <AMD 768 ATA100 controller> port 0xd800-0xd80f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
ahc0: <Adaptec 3960D Ultra160 SCSI adapter> port 0xd400-0xd4ff mem 0xed800000-0xed800fff irq 10 at device 9.0 on pci0
aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
ahc1: <Adaptec 3960D Ultra160 SCSI adapter> port 0xd000-0xd0ff mem 0xed000000-0xed000fff irq 5 at device 9.1 on pci0
aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs
pcib2: <ACPI PCI-PCI bridge> at device 16.0 on pci0
pcib2: could not get PCI interrupt routing table for \\_SB_.PCI0.OP2P - AE_NOT_FOUND
pci2: <ACPI PCI bus> on pcib2
fxp0: <Intel Pro 10/100B/100+ Ethernet> port 0xb800-0xb83f mem 0xeb800000-0xeb8fffff,0xec000000-0xec000fff irq 10 at device 6.0 on pci2
fxp0: Ethernet address 00:90:27:bc:09:95
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pci2: <multimedia, audio> at device 8.0 (no driver attached)
pci2: <input device> at device 8.1 (no driver attached)
ppc0 port 0x778-0x77f,0x378-0x37f irq 7 drq 3 on acpi0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/9 bytes threshold
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
sio1 port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse Explorer, device ID 4
orm0: <Option ROMs> at iomem 0xd8000-0xd8fff,0xc0000-0xcc7ff on isa0
fdc0: cannot reserve I/O port range (6 ports)
pmtimer0 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounters tick every 10.000 msec
acpi_cpu: CPU throttling enabled, 2 steps from 100% to 50.0%
ad0: 12949MB <IBM-DJNA-371350> [26310/16/63] at ata0-master UDMA66
acd0: DVD-ROM <CREATIVEDVD8400E> at ata1-master PIO4
Mounting root from ufs:/dev/ad0s1a
cd0 at ahc0 bus 0 target 4 lun 0
cd0: <PLEXTOR CD-R   PX-W1210S 1.01> Removable CD-ROM SCSI-2 device
cd0: 20.000MB/s transfers (20.000MHz, offset 16)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST336704LW 0004> Fixed Direct Access SCSI-3 device
da0: 40.000MB/s transfers (20.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da0: 35003MB (71687369 512 byte sectors: 255H 63S/T 4462C)
WARNING: / was not properly dismounted
/: mount pending error: blocks 303174 files 21
panic: from debugger

syncing disks... panic: bremfree: bp 0xce62a48c not locked
Uptime: 18h4m17s
Dumping 511 MB
ata0: resetting devices ..
done
 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 368 384 400 416 432 448 464 480 496
---
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:223
223		dumping++;
(kgdb) source mkm
(kgdb) xps
      proc   pid      flag st      wchan comm
0xc4d2d8c0  1081      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d2da80  1080      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d2dc40  1079      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d2de00  1078      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d33000  1077      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d331c0  1076      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d33380  1075      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d33540  1074      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d33700  1073      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d338c0  1072      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d33a80  1071      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d33c40  1070      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d33e00  1069      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d34000  1068      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1a000  1067      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1a1c0  1066      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1a380  1065      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1a540  1064      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1a700  1063      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1a8c0  1062      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1aa80  1061      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1ac40  1060      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1ae00  1059      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1c000  1058      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1c1c0  1057      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1c380  1056      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1c540  1055      100  13 0xc42d2ea4 sshd (ufs)
0xc4d1c700  1054      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1c8c0  1053      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1ca80  1052      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1cc40  1051      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d1ce00  1050      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfb1c0  1049      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfb380  1048      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfb540  1047      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfb700  1046      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfb8c0  1045      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfba80  1044      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfbc40  1043      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cfbe00  1042      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0b000  1041      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0b1c0  1040      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0b380  1039      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0b540  1038      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0b700  1037      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0b8c0  1036      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0ba80  1035      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0bc40  1034      100  13 0xc42d2ea4 sendmail (ufs)
0xc4d0be00  1033      100  13 0xc42d2ea4 sendmail (ufs)
0xc451f540  1032      100  13 0xc42d2ea4 sendmail (ufs)
0xc451f700  1031      100  13 0xc42d2ea4 sendmail (ufs)
---Type <return> to continue, or q <return> to quit---
0xc451f8c0  1030      100  13 0xc42d2ea4 sendmail (ufs)
0xc451fa80  1029      100  13 0xc42d2ea4 sendmail (ufs)
0xc451fc40  1028      100  13 0xc42d2ea4 sendmail (ufs)
0xc451fe00  1027      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf7000  1026      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf71c0  1025      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf7380  1024      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf7540  1023      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf7700  1022      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf78c0  1021      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf7a80  1020      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf7c40  1019      100  13 0xc42d2ea4 sendmail (ufs)
0xc4cf7e00  1018       10  13 0xc43b1c54 cron (ufs)
0xc4cfb000  1017        0  13 0xc4cfb000 cron (ppwait)
0xc451f380  1016       10  13 0xc058b630 cron (nbufbs)
0xc4202e00  1015        0  13 0xc4202e00 cron (ppwait)
0xc42d0a80  1014     4000  13 0xc058b630 logger (flswai)
0xc451f000  1013     4000  13 0xc451f000 sh (wait)
0xc451e380  1005   404000  13 0xc058b630 find (nbufbs)
0xc451ea80  1004     4000  13 0xc417d210 sort (piperd)
0xc42d08c0  1003     4000  13 0xc417d2c0 sed (piperd)
0xc451e1c0  1002     4000  13 0xc416d840 xargs (piperd)
0xc4202540  1001        0  13 0xc4202540 sh (wait)
0xc4202a80   994     4000  13 0xc416de70 mail (piperd)
0xc451ec40   993     4000  13 0xc451ec40 sh (wait)
0xc451e000   992        0  13 0xc451e000 sh (wait)
0xc4202c40   991        0  13 0xc4202c40 sh (wait)
0xc451ee00   985     4000  13 0xc451ee00 sh (wait)
0xc42d0700   984     4000  13 0xc42d0700 sh (wait)
0xc451f1c0   908     4000  13 0xc416da50 mail (piperd)
0xc451e700   906        0  13 0xc451e700 sh (wait)
0xc4195e00   905        0  13 0xc4195e00 sh (wait)
0xc451e540   898     4000  13 0xc451e540 sh (wait)
0xc42d0c40   897     4000  13 0xc42d0c40 sh (wait)
0xc451e8c0   895        0  13 0xc416d4d0 cron (piperd)
0xc42d01c0   461     4002  13 0xc42c2810 getty (ttyin)
0xc4202700   460     4002  13 0xc42b4810 getty (ttyin)
0xc42d0e00   459     4002  13 0xc42b5810 getty (ttyin)
0xc42021c0   458     4002  13 0xc42abc10 getty (ttyin)
0xc42d0540   457     4002  13 0xc417cc10 getty (ttyin)
0xc4202000   456     4002  13 0xc417ca10 getty (ttyin)
0xc42d0380   455     4002  13 0xc42b4410 getty (ttyin)
0xc42cd700   454     4002  13 0xc058b630 getty (flswai)
0xc42cd1c0   446        0  13 0xc430b564 cron (ufs)
0xc4202380   398  2000100  13 0xdad5a000 sendmail (pause)
0xc42028c0   395      100  13 0xc0516b44 sendmail (select)
0xc42cd540   389      100  13 0xc42d2ea4 sshd (ufs)
0xc4195a80   360        0  13 0xc058b630 ntpd (flswai)
0xc42cd000   228        0  13 0xc058b630 syslogd (flswai)
0xc42cd380   178        0  13 0xc42cd380 dhclient (wait)
0xc4195c40   127  2000000  13 0xd9b0b000 adjkerntz (pause)
0xc42cd8c0    38      204  13 0xc0524b6c nfsiod 3 (nfsidl)
---Type <return> to continue, or q <return> to quit---
0xc42cda80    37      204  13 0xc0524b68 nfsiod 2 (nfsidl)
0xc42cdc40    36      204  13 0xc0524b64 nfsiod 1 (nfsidl)
0xc42cde00    35      204  13 0xc0524b60 nfsiod 0 (nfsidl)
0xc42d0000    34   400204  13 0xc058b630 syncer (nbufbs)
0xc4128540     9      204  13 0xc4128540 vnlru (vlruwt)
0xc4128700     8      204  13 0xc41385c0 bufdaemon (snaplk)
0xc41288c0     7      20c  13 0xc058f098 pagezero (pgzero)
0xc4128a80     6      204  13 0xc058f0ac vmdaemon (psleep)
0xc4128c40     5      204  13 0xc052b178 pagedaemon (psleep)
0xc4128e00    33      204  13          0 irq8: rtc
0xc4195000    32      204  13          0 irq0: clk
0xc41951c0    31      204  13          0 irq12: psm0
0xc4195380    30      204  13          0 irq1: atkbd0
0xc4195540    29      204  13          0 irq3: sio1
0xc4195700    28      204  13          0 irq4: sio0
0xc41958c0    27      204  13          0 swi0: tty:sio
0xc16261c0    26      204  13          0 irq7: ppc0
0xc1626380    25      204  13          0 irq5: ahc1
0xc1626540    24      204  13          0 irq10: fxp0 ahc0
0xc1626700    23      204  13          0 irq15: ata1
0xc16268c0    22      204  13          0 irq14: ata0
0xc1626a80    21      204  13          0 irq9: acpi0
0xc1626c40    20      204  13          0 irq13:
0xc1626e00    19      204  13          0 swi5: acpitaskq
0xc4128000    18      204  13          0 swi5: task queue
0xc41281c0    17      204  13          0 swi3: cambio
0xc4128380    16      204  13          0 swi2: camnet
0xc161f000    15      204  13 0xc0551e40 random (sleep)
0xc161f1c0     4      204  13 0xc050db10 g_down (g_down)
0xc161f380     3      204  13 0xc050db0c g_up (g_up)
0xc161f540     2      204  13 0xc050db04 g_event (g_events)
0xc161f700    14      204  13          0 swi4: vm
0xc161f8c0    13      20c  13          0 swi6: tty:sio clock
0xc161fa80    12      204  13          0 swi1: net
0xc161fc40    11      20c  13          0 idle
0xc161fe00     1     4200  13 0xc161fe00 init (wait)
0xc1626000    10      204  13 0xc0562964 ktrace (ktrace)
0xc050ed80     0      200  13 0xc050ed80 swapper (sched)
(kgdb) proc 1081
(kgdb) bt
#0  mi_switch () at /usr/src/sys/kern/kern_synch.c:503
#1  0xc02e4e26 in msleep (ident=0xc42d2ea4, mtx=0xc05645c8, priority=80,
    wmesg=0x0, timo=0) at /usr/src/sys/kern/kern_synch.c:248
#2  0xc02d1707 in acquire (lkp=0xc42d2ea4, extflags=16777280, wanted=1536)
    at /usr/src/sys/kern/kern_lock.c:168
#3  0xc02d1ac8 in lockmgr (lkp=0xc42d2ea4, flags=16973826, interlkp=0x1000040,
    td=0xc4cf88f0) at /usr/src/sys/kern/kern_lock.c:381
#4  0xc0327e6c in vop_stdlock (ap=0x0) at /usr/src/sys/kern/vfs_default.c:279
#5  0xc040f1a8 in ufs_vnoperate (ap=0x0)
    at /usr/src/sys/ufs/ufs/ufs_vnops.c:2763
#6  0xc033c6cb in vn_lock (vp=0xc42d2de0, flags=131074, td=0xc4cf88f0)
    at vnode_if.h:990
#7  0xc0329bfe in lookup (ndp=0xdadf1bd8) at /usr/src/sys/kern/vfs_lookup.c:348
#8  0xc032986e in namei (ndp=0xdadf1bd8) at /usr/src/sys/kern/vfs_lookup.c:181
#9  0xc033b47a in vn_open_cred (ndp=0xdadf1bd8, flagp=0xdadf1cd8, cmode=420,
    cred=0xc41f8c00) at /usr/src/sys/kern/vfs_vnops.c:190
#10 0xc033b209 in vn_open (ndp=0x0, flagp=0x0, cmode=0)
    at /usr/src/sys/kern/vfs_vnops.c:91
#11 0xc0334c73 in kern_open (td=0xc4cf88f0, path=0x0, pathseg=UIO_USERSPACE,
    flags=1, mode=438) at /usr/src/sys/kern/vfs_syscalls.c:656
#12 0xc0334ae0 in open (td=0x0, uap=0x0)
    at /usr/src/sys/kern/vfs_syscalls.c:619
#13 0xc045cb1e in syscall (frame=
      {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 0, tf_esi = 135141280, tf_ebp = -1077943720, tf_isp = -622912140, tf_ebx = 0, tf_edx = 135043099, tf_ecx = 135381808, tf_eax = 5, tf_trapno = 12, tf_err = 2, tf_eip = 673529411, tf_cs = 31, tf_eflags = 663, tf_esp = -1077943748, tf_ss = 47})
    at /usr/src/sys/i386/i386/trap.c:1071
#14 0xc044d28d in Xint0x80_syscall () at {standard input}:140
Cannot access memory at address 0xbfbfe258
(kgdb) proc 1055
(kgdb) bt
#0  mi_switch () at /usr/src/sys/kern/kern_synch.c:503
#1  0xc02e4e26 in msleep (ident=0xc42d2ea4, mtx=0xc05645c8, priority=80,
    wmesg=0x0, timo=0) at /usr/src/sys/kern/kern_synch.c:248
#2  0xc02d1707 in acquire (lkp=0xc42d2ea4, extflags=16777280, wanted=1536)
    at /usr/src/sys/kern/kern_lock.c:168
#3  0xc02d1ac8 in lockmgr (lkp=0xc42d2ea4, flags=16973826, interlkp=0x1000040,
    td=0xc4d0c270) at /usr/src/sys/kern/kern_lock.c:381
#4  0xc0327e6c in vop_stdlock (ap=0x0) at /usr/src/sys/kern/vfs_default.c:279
#5  0xc040f1a8 in ufs_vnoperate (ap=0x0)
    at /usr/src/sys/ufs/ufs/ufs_vnops.c:2763
#6  0xc033c6cb in vn_lock (vp=0xc42d2de0, flags=131074, td=0xc4d0c270)
    at vnode_if.h:990
#7  0xc0329bfe in lookup (ndp=0xdae45bd8) at /usr/src/sys/kern/vfs_lookup.c:348
#8  0xc032986e in namei (ndp=0xdae45bd8) at /usr/src/sys/kern/vfs_lookup.c:181
#9  0xc033b47a in vn_open_cred (ndp=0xdae45bd8, flagp=0xdae45cd8, cmode=420,
    cred=0xc41f8b00) at /usr/src/sys/kern/vfs_vnops.c:190
#10 0xc033b209 in vn_open (ndp=0x0, flagp=0x0, cmode=0)
    at /usr/src/sys/kern/vfs_vnops.c:91
#11 0xc0334c73 in kern_open (td=0xc4d0c270, path=0x0, pathseg=UIO_USERSPACE,
    flags=1, mode=438) at /usr/src/sys/kern/vfs_syscalls.c:656
#12 0xc0334ae0 in open (td=0x0, uap=0x0)
    at /usr/src/sys/kern/vfs_syscalls.c:619
#13 0xc045cb1e in syscall (frame=
      {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 4, tf_esi = 673881024, tf_ebp = -1077941144, tf_isp = -622568076, tf_ebx = 673802908, tf_edx = 673881024, tf_ecx = 673013122, tf_eax = 5, tf_trapno = 12, tf_err = 2, tf_eip = 673336899, tf_cs = 31, tf_eflags = 518, tf_esp = -1077941188, tf_ss = 47})
    at /usr/src/sys/i386/i386/trap.c:1071
#14 0xc044d28d in Xint0x80_syscall () at {standard input}:140
Cannot access memory at address 0xbfbfec68
(kgdb) proc 1018
(kgdb) bt
#0  mi_switch () at /usr/src/sys/kern/kern_synch.c:503
#1  0xc02e4e26 in msleep (ident=0xc43b1c54, mtx=0xc0565178, priority=80,
    wmesg=0x0, timo=0) at /usr/src/sys/kern/kern_synch.c:248
#2  0xc02d1707 in acquire (lkp=0xc43b1c54, extflags=16777280, wanted=1536)
    at /usr/src/sys/kern/kern_lock.c:168
#3  0xc02d1ac8 in lockmgr (lkp=0xc43b1c54, flags=16842754, interlkp=0x1000040,
    td=0xc4cf81a0) at /usr/src/sys/kern/kern_lock.c:381
#4  0xc0327e6c in vop_stdlock (ap=0x0) at /usr/src/sys/kern/vfs_default.c:279
#5  0xc040f1a8 in ufs_vnoperate (ap=0x0)
    at /usr/src/sys/ufs/ufs/ufs_vnops.c:2763
#6  0xc033c6cb in vn_lock (vp=0xc43b1b90, flags=65538, td=0xc4cf81a0)
    at vnode_if.h:990
#7  0xc0330dd9 in vget (vp=0xc43b1b90, flags=2, td=0x0)
    at /usr/src/sys/kern/vfs_subr.c:2065
#8  0xc03257ed in vfs_cache_lookup (ap=0x0)
    at /usr/src/sys/kern/vfs_cache.c:632
#9  0xc040f1a8 in ufs_vnoperate (ap=0x0)
    at /usr/src/sys/ufs/ufs/ufs_vnops.c:2763
#10 0xc0329e72 in lookup (ndp=0xdadd6c24) at vnode_if.h:52
#11 0xc032986e in namei (ndp=0xdadd6c24) at /usr/src/sys/kern/vfs_lookup.c:181
#12 0xc0336b72 in stat (td=0xc4cf81a0, uap=0xdadd6d10)
    at /usr/src/sys/kern/vfs_syscalls.c:1648
#13 0xc045cb1e in syscall (frame=
      {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 0, tf_esi = 134565888, tf_ebp = -1077938696, tf_isp = -623022732, tf_ebx = 672344732, tf_edx = 0, tf_ecx = 0, tf_eax = 188, tf_trapno = 12, tf_err = 2, tf_eip = 671875395, tf_cs = 31, tf_eflags = 582, tf_esp = -1077938852, tf_ss = 47})
    at /usr/src/sys/i386/i386/trap.c:1071
#14 0xc044d28d in Xint0x80_syscall () at {standard input}:140
Cannot access memory at address 0xbfbff5f8
(kgdb) quit
coredump# exit
exit

Script done on Thu Oct 24 19:00:39 2002



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