Date: Thu, 31 Dec 1998 00:53:24 +0200 (EET) From: Ville Eerola <ve@sci.fi> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/9249: Panic on 2.2.8-STABLE when accessing wcd CDROM Message-ID: <199812302253.AAA00627@vebsd.vlsi.fi>
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>Number: 9249
>Category: kern
>Synopsis: Panic on 2.2.8-STABLE when accessing wcd CDROM
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Dec 30 15:00:01 PST 1998
>Last-Modified:
>Originator: Ville Eerola
>Organization:
>Release: FreeBSD 2.2.8-STABLE i386
>Environment:
FreeBSD vebsd 2.2.8-STABLE FreeBSD 2.2.8-STABLE #0: Thu Dec 24 03:17:06 EET 1998 ville@vebsd:/disk4/FreeBSD/src/sys/compile/VEBSD i386
Last CTM applied to CVS before compiling kernel (& making world) was
cvs-cur.4920.gz
% cat /sys/i386/conf/VEBSD
[...]
options "CD9660" #ISO 9660 Filesystem
[...]
controller wdc0 at isa? port "IO_WD1" bio irq 14 vector wdintr
disk wd0 at wdc0 drive 0
options ATAPI #Enable ATAPI support for IDE bus
options ATAPI_STATIC #Don't do it as an LKM
device wcd0 #IDE CD-ROM
[...]
controller ahc0
controller scbus0
device sd0
device cd0
% dmesg
Copyright (c) 1992-1998 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 2.2.8-STABLE #0: Thu Dec 24 03:17:06 EET 1998
ville@vebsd:/disk4/FreeBSD/src/sys/compile/VEBSD
CPU: Pentium Pro (198.67-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x619 Stepping=9
Features=0xfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV>
real memory = 67108864 (65536K bytes)
avail memory = 63836160 (62340K bytes)
Probing for devices on PCI bus 0:
chip0 <Intel 82440FX (Natoma) PCI and memory controller> rev 2 on pci0:0:0
fxp0 <Intel EtherExpress Pro 10/100B Ethernet> rev 1 int a irq 15 on pci0:6:0
fxp0: Ethernet address 00:a0:c9:49:87:e5
chip1 <Intel 82371SB PCI-ISA bridge> rev 1 on pci0:7:0
chip2 <Intel 82371SB IDE interface> rev 0 on pci0:7:1
ahc0 <Adaptec aic7880 Ultra SCSI host adapter> rev 0 int a irq 11 on pci0:9:0
ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
(ahc0:0:0): "QUANTUM FIREBALL_TM2110S 300X" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 2014MB (4124736 512 byte sectors)
(ahc0:1:0): "SEAGATE ST31230N 0300" type 0 fixed SCSI 2
sd1(ahc0:1:0): Direct-Access 1010MB (2069860 512 byte sectors)
(ahc0:3:0): "IBM DPES-31080 S31Q" type 0 fixed SCSI 2
sd2(ahc0:3:0): Direct-Access 1034MB (2118144 512 byte sectors)
(ahc0:4:0): "SEAGATE ST32155N 0318" type 0 fixed SCSI 2
sd3(ahc0:4:0): Direct-Access 2049MB (4197405 512 byte sectors)
(ahc0:5:0): "SEAGATE ST31230N 0300" type 0 fixed SCSI 2
sd4(ahc0:5:0): Direct-Access 1010MB (2069860 512 byte sectors)
(ahc0:6:0): "TEAC CD-R55S 1.0K" type 5 removable SCSI 2
cd0(ahc0:6:0): CD-ROM can't get the size
vga0 <VGA-compatible display device> rev 1 int a irq 11 on pci0:11:0
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
ppc0 at 0x378 irq 7 on isa
ppc0: Generic chipset (NIBBLE-only) in NIBBLE mode
ppi0: <generic parallel i/o> on ppbus 0
nlpt0: <generic printer> on ppbus 0
nlpt0: Interrupt-driven port
psm0 at 0x60-0x64 irq 12 on motherboard
psm0: model Generic PS/2 mouse, device ID 0
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (atapi): <FX120T/b03>, removable, intr, dma, iordis
npx0 on motherboard
npx0: INT 16 interface
sb0 at 0x220 irq 5 drq 1 on isa
sb0: <SoundBlaster Pro 3.2>
sbmidi0 not found at 0x330
opl0 at 0x388 on isa
opl0: <Yamaha OPL-3 FM>
>Description:
When trying to access CDROM which uses the wcd driver the system
panics with "Fatal trap 12: page fault while in kernel mode"
Also the same system is totally happy accessing a CDROM in a SCSI
cdrom-device (actually a CD-R burner). This leads one to think that
the problem is probably in the wcd driver and not in any general CDROM
code...
The relevant data is:
(typed by hand from not on paper)
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x1c
fault code = supervisor read, page not present
instruction pointer = 0x8:0xf01b9943
stack pointer = 0x10:0xefbffcc0
frame pointer = 0x10:0xefbffcc4
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 = 337 (mount_cd9660)
interrupt mask = bio
panic: page fault
% nm kernel | sort
[...]
f01b993c t _atapi_alloc
f01b997c t _atapi_free
f01b99ac t _atapi_enqueue
[...]
>How-To-Repeat:
I have found at least two ways:
1) Try to mount the CD in the drive
# mount_cd9660 /dev/wcd0c /cdrom
2) Try to read data out of the raw CD
% cat /dev/rwcd0c > /dev/null
>Fix:
>Audit-Trail:
>Unformatted:
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