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Date:      Thu, 10 Apr 2003 12:16:31 EST
From:      Andrea Venturoli <ml.ventu@flashnet.it>
To:        freebsd-stable@freebsd.org
Subject:   Crash dump in umount
Message-ID:  <200304101016.h3AAGV8U001162@soth.ventu>

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Hello.

I'm having a 4.7Rp9 server which is since months quite unstable, so I've compiled a debug kernel and got a crash dump.
I'm a programmer and I know a little how to use gdb, I'm not so expert about FreeBSD kernel insides however, so I can't
get much from it. Any kind of help is appreciated.


This is the crash message:


IdlePTD at phsyical address 0x0032f000
initial pcb at physical address 0x00288ca0
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0x2c
fault code		= supervisor read, page not present
instruction pointer	= 0x8:0xc014f4ea
stack pointer	        = 0x10:0xc82c7d5c
frame pointer	        = 0x10:0xc82c7d5c
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, def32 1, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 1108 (umount)
interrupt mask		= bio 
trap number		= 12
panic: page fault

syncing disks... 

Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0x2c
fault code		= supervisor read, page not present
instruction pointer	= 0x8:0xc014f4ea
stack pointer	        = 0x10:0xc82c7a88
frame pointer	        = 0x10:0xc82c7a88
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, def32 1, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 1108 (umount)
interrupt mask		= bio 
trap number		= 12
panic: page fault
Uptime: 54m10s

dumping to dev #da/0x20019, offset 262304
dump 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 






Following is the stack trace (as output from bt):


#0  dumpsys () at ../../kern/kern_shutdown.c:487
#1  0xc015b2ef in boot (howto=260) at ../../kern/kern_shutdown.c:316
#2  0xc015b714 in poweroff_wait (junk=0xc02594cc, howto=-1071280145)
    at ../../kern/kern_shutdown.c:595
#3  0xc021c30a in trap_fatal (frame=0xc82c7a48, eva=44)
    at ../../i386/i386/trap.c:974
#4  0xc021bfdd in trap_pfault (frame=0xc82c7a48, usermode=0, eva=44)
    at ../../i386/i386/trap.c:867
#5  0xc021bbc7 in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, 
      tf_edi = -1060177920, tf_esi = 1, tf_ebp = -936609144, 
      tf_isp = -936609164, tf_ebx = -1060241888, tf_edx = 2, tf_ecx = 1, 
      tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip = -1072368406, tf_cs = 8, 
      tf_eflags = 66118, tf_esp = -936609112, tf_ss = -1062357007})
    at ../../i386/i386/trap.c:466
#6  0xc014f4ea in devsw (dev=0x0) at ../../kern/kern_conf.c:76
#7  0xc0adb7f1 in ?? ()
#8  0xc0adb4ea in ?? ()
#9  0xc0adb352 in ?? ()
#10 0xc0193f48 in spec_strategy (ap=0xc82c7b2c)
    at ../../miscfs/specfs/spec_vnops.c:479
#11 0xc0193971 in spec_vnoperate (ap=0xc82c7b2c)
    at ../../miscfs/specfs/spec_vnops.c:119
#12 0xc01dc955 in ufs_vnoperatespec (ap=0xc82c7b2c)
    at ../../ufs/ufs/ufs_vnops.c:2440
#13 0xc0180bfa in bwrite (bp=0xc33c24bc) at vnode_if.h:944
#14 0xc018620e in vop_stdbwrite (ap=0xc82c7b74) at ../../kern/vfs_default.c:331
#15 0xc0186069 in vop_defaultop (ap=0xc82c7b74) at ../../kern/vfs_default.c:150
#16 0xc0193971 in spec_vnoperate (ap=0xc82c7b74)
    at ../../miscfs/specfs/spec_vnops.c:119
#17 0xc01dc955 in ufs_vnoperatespec (ap=0xc82c7b74)
    at ../../ufs/ufs/ufs_vnops.c:2440
#18 0xc0180f4a in bawrite (bp=0xc33c24bc) at vnode_if.h:1193
#19 0xc01d1baa in softdep_fsync_mountdev (vp=0xc841c640)
    at ../../ufs/ffs/ffs_softdep.c:4048
#20 0xc01d5d12 in ffs_fsync (ap=0xc82c7bfc) at ../../ufs/ffs/ffs_vnops.c:134
#21 0xc01d49a3 in ffs_sync (mp=0xc0b9ae00, waitfor=2, cred=0xc0731900, 
    p=0xc02b94e0) at vnode_if.h:558
#22 0xc018b0df in sync (p=0xc02b94e0, uap=0x0) at ../../kern/vfs_syscalls.c:576
#23 0xc015b08a in boot (howto=256) at ../../kern/kern_shutdown.c:235
#24 0xc015b714 in poweroff_wait (junk=0xc02594cc, howto=-1071280145)
    at ../../kern/kern_shutdown.c:595
#25 0xc021c30a in trap_fatal (frame=0xc82c7d1c, eva=44)
    at ../../i386/i386/trap.c:974
#26 0xc021bfdd in trap_pfault (frame=0xc82c7d1c, usermode=0, eva=44)
    at ../../i386/i386/trap.c:867
#27 0xc021bbc7 in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, 
      tf_edi = -1060344832, tf_esi = 1, tf_ebp = -936608420, 
      tf_isp = -936608440, tf_ebx = -1061470176, tf_edx = 1, tf_ecx = 1, 
      tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip = -1072368406, tf_cs = 8, 
      tf_eflags = 66118, tf_esp = -936608388, tf_ss = -1062357007})
    at ../../i386/i386/trap.c:466
#28 0xc014f4ea in devsw (dev=0x0) at ../../kern/kern_conf.c:76
#29 0xc0adb7f1 in ?? ()
#30 0xc0adb4ea in ?? ()
#31 0xc0adb352 in ?? ()
#32 0xc0193f48 in spec_strategy (ap=0xc82c7dfc)
    at ../../miscfs/specfs/spec_vnops.c:479
#33 0xc0193971 in spec_vnoperate (ap=0xc82c7dfc)
    at ../../miscfs/specfs/spec_vnops.c:119
#34 0xc01dc955 in ufs_vnoperatespec (ap=0xc82c7dfc)
    at ../../ufs/ufs/ufs_vnops.c:2440
#35 0xc01dc255 in ufs_strategy (ap=0xc82c7e40) at vnode_if.h:944
#36 0xc01dc925 in ufs_vnoperate (ap=0xc82c7e40)
    at ../../ufs/ufs/ufs_vnops.c:2422
#37 0xc0180bfa in bwrite (bp=0xc33a4cac) at vnode_if.h:944
#38 0xc018620e in vop_stdbwrite (ap=0xc82c7e7c) at ../../kern/vfs_default.c:331
#39 0xc0186069 in vop_defaultop (ap=0xc82c7e7c) at ../../kern/vfs_default.c:150
#40 0xc01dc925 in ufs_vnoperate (ap=0xc82c7e7c)
    at ../../ufs/ufs/ufs_vnops.c:2422
#41 0xc0180f4a in bawrite (bp=0xc33a4cac) at vnode_if.h:1193
#42 0xc01d5e9e in ffs_fsync (ap=0xc82c7ee8) at ../../ufs/ffs/ffs_vnops.c:198
#43 0xc01d48cb in ffs_sync (mp=0xc0b9ae00, waitfor=2, cred=0xc0731900, 
    p=0xc7801700) at vnode_if.h:558
#44 0xc018b0df in sync (p=0xc7801700, uap=0xc82c7f80)
    at ../../kern/vfs_syscalls.c:576
#45 0xc021c5b9 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47, 
      tf_edi = 2, tf_esi = -1077936668, tf_ebp = -1077936752, 
      tf_isp = -936607788, tf_ebx = -1077936668, tf_edx = 0, tf_ecx = 0, 
      tf_eax = 36, tf_trapno = 12, tf_err = 2, tf_eip = 134522764, tf_cs = 31, 
      tf_eflags = 658, tf_esp = -1077936812, tf_ss = 47})
    at ../../i386/i386/trap.c:1175
#46 0xc02109b5 in Xint0x80_syscall ()
#47 0x8048135 in ?? ()





And, finally, this is my kernel configuration file:


#
# GENERIC -- Generic kernel configuration file for FreeBSD/i386
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
#    http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ./LINT configuration file. If you are
# in doubt as to the purpose or necessity of a line, check first in LINT.
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.246.2.48 2002/08/31 20:28:26 obrien Exp $

machine		i386
#cpu		I386_CPU
#cpu		I486_CPU
#cpu		I586_CPU
cpu		I686_CPU
ident		GENERIC
maxusers	0

makeoptions	DEBUG=-g		#Build kernel with gdb(1) debug symbols

#options 	MATH_EMULATE		#Support for x87 emulation
options 	INET			#InterNETworking
#options 	INET6			#IPv6 communications protocols
options 	FFS			#Berkeley Fast Filesystem
options 	FFS_ROOT		#FFS usable as root device [keep this!]
options 	SOFTUPDATES		#Enable FFS soft updates support
options 	UFS_DIRHASH		#Improve performance on big directories
options 	MFS			#Memory Filesystem
options 	MD_ROOT			#MD is a potential root device
#options 	NFS			#Network Filesystem
#options 	NFS_ROOT		#NFS usable as root device, NFS required
options 	MSDOSFS			#MSDOS Filesystem
options 	CD9660			#ISO 9660 Filesystem
#options 	CD9660_ROOT		#CD-ROM usable as root, CD9660 required
options 	PROCFS			#Process filesystem
options 	COMPAT_43		#Compatible with BSD 4.3 [KEEP THIS!]
options 	SCSI_DELAY=15000	#Delay (in ms) before probing SCSI
options 	UCONSOLE		#Allow users to grab the console
options 	USERCONFIG		#boot -c editor
#options 	VISUAL_USERCONFIG	#visual boot -c editor
options 	KTRACE			#ktrace(1) support
options 	SYSVSHM			#SYSV-style shared memory
options 	SYSVMSG			#SYSV-style message queues
options 	SYSVSEM			#SYSV-style semaphores
options 	P1003_1B		#Posix P1003_1B real-time extensions
options 	_KPOSIX_PRIORITY_SCHEDULING
options		ICMP_BANDLIM		#Rate limit bad replies
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
options		AHC_REG_PRETTY_PRINT	# Print register bitfields in debug
					# output.  Adds ~128k to driver.
options		AHD_REG_PRETTY_PRINT	# Print register bitfields in debug 
					# output.  Adds ~215k to driver.

# To make an SMP kernel, the next two are needed
#options 	SMP			# Symmetric MultiProcessor Kernel
#options 	APIC_IO			# Symmetric (APIC) I/O

device		isa
#device		eisa
device		pci

# Floppy drives
#device		fdc0	at isa? port IO_FD1 irq 6 drq 2
#device		fd0	at fdc0 drive 0
#device		fd1	at fdc0 drive 1
#
# If you have a Toshiba Libretto with its Y-E Data PCMCIA floppy,
# don't use the above line for fdc0 but the following one:
#device		fdc0

# ATA and ATAPI devices
#device		ata0	at isa? port IO_WD1 irq 14
#device		ata1	at isa? port IO_WD2 irq 15
#device		ata
#device		atadisk			# ATA disk drives
#device		atapicd			# ATAPI CDROM drives
#device		atapifd			# ATAPI floppy drives
#device		atapist			# ATAPI tape drives
#options 	ATA_STATIC_ID		#Static device numbering

# SCSI Controllers
#device		ahb		# EISA AHA1742 family
#device		ahc		# AHA2940 and onboard AIC7xxx devices
#device		amd		# AMD 53C974 (Teckram DC-390(T))
#device		isp		# Qlogic family
#device		ncr		# NCR/Symbios Logic
device		sym		# NCR/Symbios Logic (newer chipsets)
options		SYM_SETUP_LP_PROBE_MAP=0x40
				# Allow ncr to attach legacy NCR devices when 
				# both sym and ncr are configured

#device		adv0	at isa?
#device		adw
#device		bt0	at isa?
#device		aha0	at isa?
#device		aic0	at isa?

#device		ncv		# NCR 53C500
#device		nsp		# Workbit Ninja SCSI-3
#device		stg		# TMC 18C30/18C50

# SCSI peripherals
device		scbus		# SCSI bus (required)
device		da		# Direct Access (disks)
#device		sa		# Sequential Access (tape etc)
device		cd		# CD
#device		pass		# Passthrough device (direct SCSI access)

# RAID controllers interfaced to the SCSI subsystem
#device		asr		# DPT SmartRAID V, VI and Adaptec SCSI RAID
#device		dpt		# DPT Smartcache - See LINT for options!
#device		mly		# Mylex AcceleRAID/eXtremeRAID

# RAID controllers
#device		ida		# Compaq Smart RAID
#device		amr		# AMI MegaRAID
#device		mlx		# Mylex DAC960 family
#device		twe		# 3ware Escalade

# atkbdc0 controls both the keyboard and the PS/2 mouse
device		atkbdc0	at isa? port IO_KBD
device		atkbd0	at atkbdc? irq 1 flags 0x1
#device		psm0	at atkbdc? irq 12

device		vga0	at isa?

# splash screen/screen saver
pseudo-device	splash

# syscons is the default console driver, resembling an SCO console
device		sc0	at isa? flags 0x100

# Enable this and PCVT_FREEBSD for pcvt vt220 compatible console driver
#device		vt0	at isa?
#options 	XSERVER			# support for X server on a vt console
#options 	FAT_CURSOR		# start with block cursor
# If you have a ThinkPAD, uncomment this along with the rest of the PCVT lines
#options 	PCVT_SCANSET=2		# IBM keyboards are non-std

# Floating point support - do not disable.
device		npx0	at nexus? port IO_NPX irq 13

# Power management support (see LINT for more options)
device		apm0    at nexus? flags 0x20 # Advanced Power Management

# PCCARD (PCMCIA) support
#device		card
#device		pcic0	at isa? irq 0 port 0x3e0 iomem 0xd0000
#device		pcic1	at isa? irq 0 port 0x3e2 iomem 0xd4000 disable

# Serial (COM) ports
device		sio0	at isa? port IO_COM1 flags 0x10 irq 4
#device		sio1	at isa? port IO_COM2 irq 3
#device		sio2	at isa? disable port IO_COM3 irq 5
#device		sio3	at isa? disable port IO_COM4 irq 9

# Parallel port
device		ppc0	at isa? irq 7
device		ppbus		# Parallel port bus (required)
device		lpt		# Printer
#device		plip		# TCP/IP over parallel
#device		ppi		# Parallel port interface device
#device		vpo		# Requires scbus and da


# PCI Ethernet NICs.
#device		de		# DEC/Intel DC21x4x (``Tulip'')
#device		tx		# SMC 9432TX (83c170 ``EPIC'')
#device		vx		# 3Com 3c590, 3c595 (``Vortex'')
#device		wx		# Intel Gigabit Ethernet Card (``Wiseman'')

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device		miibus		# MII bus support
#device		dc		# DEC/Intel 21143 and various workalikes
device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)
#device		pcn		# AMD Am79C79x PCI 10/100 NICs
#device		rl		# RealTek 8129/8139
#device		sf		# Adaptec AIC-6915 (``Starfire'')
#device		sis		# Silicon Integrated Systems SiS 900/SiS 7016
#device		ste		# Sundance ST201 (D-Link DFE-550TX)
#device		tl		# Texas Instruments ThunderLAN
#device		vr		# VIA Rhine, Rhine II
#device		wb		# Winbond W89C840F
#device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')

# ISA Ethernet NICs.
#device		ed0	at isa? port 0x280 irq 10 iomem 0xd8000
#device		ex
#device		ep
#device		fe0	at isa? port 0x300
# WaveLAN/IEEE 802.11 wireless NICs. Note: the WaveLAN/IEEE really
# exists only as a PCMCIA device, so there is no ISA attachment needed
# and resources will always be dynamically assigned by the pccard code.
#device		wi
# Aironet 4500/4800 802.11 wireless NICs. Note: the declaration below will
# work for PCMCIA and PCI cards, as well as ISA cards set to ISA PnP
# mode (the factory default). If you set the switches on your ISA
# card for a manually chosen I/O address and IRQ, you must specify
# those paremeters here.
#device		an
# Xircom Ethernet
#device		xe
# The probe order of these is presently determined by i386/isa/isa_compat.c.
#device		ie0	at isa? port 0x300 irq 10 iomem 0xd0000
#device		le0	at isa? port 0x300 irq 5 iomem 0xd0000
#device		lnc0	at isa? port 0x280 irq 10 drq 0
#device		cs0	at isa? port 0x300
#device		sn0	at isa? port 0x300 irq 10

# Pseudo devices - the number indicates how many units to allocate.
pseudo-device	loop		# Network loopback
pseudo-device	ether		# Ethernet support
#pseudo-device	sl	1	# Kernel SLIP
#pseudo-device	ppp	1	# Kernel PPP
pseudo-device	tun		# Packet tunnel.
pseudo-device	pty		# Pseudo-ttys (telnet etc)
pseudo-device	md		# Memory "disks"
#pseudo-device	gif		# IPv6 and IPv4 tunneling
#pseudo-device	faith	1	# IPv6-to-IPv4 relaying (translation)

# The `bpf' pseudo-device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
pseudo-device	bpf		#Berkeley packet filter

# USB support
device		uhci		# UHCI PCI->USB interface
device		ohci		# OHCI PCI->USB interface
device		usb		# USB Bus (required)
device		ugen		# Generic
device		uhid		# "Human Interface Devices"
device		ukbd		# Keyboard
#device		ulpt		# Printer
#device		umass		# Disks/Mass storage - Requires scbus and da
#device		ums		# Mouse
#device		uscanner	# Scanners
# USB Ethernet, requires mii
#device		aue		# ADMtek USB ethernet
#device		cue		# CATC USB ethernet
#device		kue		# Kawasaki LSI USB ethernet

options		IPFIREWALL
options		IPFIREWALL_VERBOSE
options		IPDIVERT
options		TCP_DROP_SYNFIN

options		NETATALK

options		ELSA_QS1PCI
device		isic
pseudo-device	"i4bq921"
pseudo-device	"i4bq931"
pseudo-device	"i4b"
pseudo-device	"i4btrc"	4
pseudo-device	"i4bctl"
pseudo-device	"i4brbch"	4
#pseudo-device	"i4btel"	2
#pseudo-device	"i4bisppp"	4
#pseude-device	"i4bipr"	4
#options		IPR_VJ

options		SEMMNI=256
options		SEMMNS=512




bye & Thanks
        av.


P.S. Please respond directy to my address too.




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