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Subjectkernel BUG at slab.c:1062!
Hi,

I have a Motorola SM56 PCI modem, and I got the following error when doing
'insmod sm56'.
The sm56 module used to work for all 2.4 kernels prior to kernel 2.4.6. (It
can be found at
http://e-www.motorola.com/products/softmodem/support/software.html#linux)

Using /lib/modules/2.4.6/kernel/drivers/char/sm56.o
kernel BUG at slab.c:1062!
invalid operand: 0000
CPU: 0
EIP: 0010:[<c012924b>]
EFLAGS: 00010286
eax: 0000001b ebx: c14452b4 ecx: c14c7bc0 edx: 00000005
esi: 00000007 edi: c14452b4 ebp: cc319e74 esp: cc319e1c
ds: 0018 es: 0018 ss: 0018
Process insmod (pid: 843, stackpage=cc319000)
Stack: c01e8c29 c01e8ca5 00000426 c14452b4 00000202 00000007 cc319e74
00000292
0000000d c012951f c14452b4 00000007 00000064 d59f352c 00000000
d59f324b
00000064 00000007 00000000 c010b178 d59a5000 00000000 cc319ea4
d59f3820
Call Trace: [<c012951f>] [<c010b178>] [<c0118d32>] [<c0106eb4>] [<c0116058>]
[<c0106e2b>]

Code: 0f 0b 83 c4 0c f7 c6 00 10 00 00 0f 85 e9 01 00 00 a1 88 a6
Segmentation fault


System info:
------------
/proc/version:

Linux version 2.4.6 (mark@thompson) (gcc version egcs-2.91.66 19990314/Linux
(egcs-1.1.2 release)) #1 Tue Sep 4 21:29:24 EEST 2001

/proc/cpuinfo:


processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 4
model name : AMD Athlon(tm) processor
stepping : 2
cpu MHz : 1006.796
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36
mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips : 2005.40


/proc/modules:

via82cxxx_audio 17360 0 (autoclean)
uart401 6576 0 (autoclean) [via82cxxx_audio]
ac97_codec 8800 0 (autoclean) [via82cxxx_audio]
sound 58400 0 (autoclean) [via82cxxx_audio uart401]
NVdriver 657856 15 (autoclean)
parport_pc 11152 1 (autoclean)
lp 5296 0 (autoclean)
parport 15520 1 (autoclean) [parport_pc lp]
autofs4 9824 1 (autoclean)
dmfe 13632 1 (autoclean)
ide-scsi 8032 0
scsi_mod 82080 1 [ide-scsi]
ide-cd 27520 0
cdrom 28736 0 [ide-cd]

/proc/ioports:

0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
02f8-02ff : serial(auto)
0376-0376 : ide1
0378-037a : parport0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
4000-40ff : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
5000-500f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
6000-607f : VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
d000-d00f : VIA Technologies, Inc. Bus Master IDE
d000-d007 : ide0
d008-d00f : ide1
d400-d41f : VIA Technologies, Inc. UHCI USB
d800-d81f : VIA Technologies, Inc. UHCI USB (#2)
dc00-dcff : VIA Technologies, Inc. AC97 Audio Controller
dc00-dcff : via82cxxx_audio
e000-e003 : VIA Technologies, Inc. AC97 Audio Controller
e000-e003 : via82cxxx_audio
e400-e403 : VIA Technologies, Inc. AC97 Audio Controller
e400-e403 : via82cxxx_audio
e800-e8ff : Advanced System Products, Inc ABP940-U / ABP960-U
ec00-ecff : Davicom Semiconductor, Inc. Ethernet 100/10 MBit
ec00-ecff : eth0

/proc/iomem:

lspci -vvv:

00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev
02)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort+ >SERR- <PERR-
Latency: 8
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=64M]
Capabilities: [a0] AGP version 2.0
Status: RQ=31 SBA+ 64bit- FW+ Rate=x1,x2
Command: RQ=0 SBA- AGP+ 64bit- FW- Rate=x2
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
(prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort+ >SERR- <PERR-
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000f000-00000fff
Memory behind bridge: e6000000-e7ffffff
Prefetchable memory behind bridge: e4000000-e5ffffff
BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 22)
Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 0

00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 10)
(prog-if 8a [Master SecP PriP])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 32
Region 4: I/O ports at d000 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.2 USB Controller: VIA Technologies, Inc. UHCI USB (rev 10) (prog-if 00
[UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 9
Region 4: I/O ports at d400 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.3 USB Controller: VIA Technologies, Inc. UHCI USB (rev 10) (prog-if 00
[UHCI])
Subsystem: Unknown device 0925:1234
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 32, cache line size 08
Interrupt: pin D routed to IRQ 9
Region 4: I/O ports at d800 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 30)
Subsystem: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI]
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Interrupt: pin ? routed to IRQ 11
Capabilities: [68] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:07.5 Multimedia audio controller: VIA Technologies, Inc. AC97 Audio
Controller (rev 20)
Subsystem: VIA Technologies, Inc.: Unknown device 4511
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Interrupt: pin C routed to IRQ 10
Region 0: I/O ports at dc00 [size=256]
Region 1: I/O ports at e000 [size=4]
Region 2: I/O ports at e400 [size=4]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:08.0 Communication controller: Analog Devices: Unknown device 1805
Subsystem: Analog Devices: Unknown device 1805
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR+
Latency: 32 (250ns min, 63750ns max)
Interrupt: pin A routed to IRQ 5
Region 0: Memory at e9001000 (32-bit, prefetchable) [size=256]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA PME(D0+,D1-,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:09.0 SCSI storage controller: Advanced System Products, Inc ABP940-U /
ABP960-U (rev 03)
Subsystem: Advanced System Products, Inc ASC1300 SCSI Adapter
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR+
Latency: 32 (1000ns min, 1000ns max), cache line size 08
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at e800 [size=256]
Region 1: Memory at e9000000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]

00:0a.0 Ethernet controller: Davicom Semiconductor, Inc. Ethernet 100/10
MBit (rev 31)
Subsystem: Unknown device 3030:5032
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR+
Latency: 32 (5000ns min, 10000ns max)
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at ec00 [size=256]
Region 1: Memory at e9002000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=256K]
Capabilities: [50] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:00.0 VGA compatible controller: nVidia Corporation Vanta [NV6] (rev 15)
(prog-if 00 [VGA])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 248 (1250ns min, 250ns max)
Interrupt: pin A routed to IRQ 5
Region 0: Memory at e6000000 (32-bit, non-prefetchable) [size=16M]
Region 1: Memory at e4000000 (32-bit, prefetchable) [size=32M]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [60] Power Management version 1
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [44] AGP version 2.0
Status: RQ=31 SBA- 64bit- FW- Rate=x1,x2
Command: RQ=31 SBA- AGP+ 64bit- FW- Rate=x2


/proc/scsi/scsi:

Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: MATSHITA Model: CD-RW CW-7586 Rev: 1.01
Type: CD-ROM ANSI SCSI revision: 02

ver_linux script:

If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.

Linux ghazaleh1 2.4.6 #1 Tue Sep 4 21:29:24 EEST 2001 i686 unknown

Gnu C 3.0
Gnu make 3.79.1
binutils 2.10.91.0.2
util-linux 2.11d
mount 2.11d
modutils 2.4.2
e2fsprogs 1.19
reiserfsprogs 3.x.0f
pcmcia-cs 3.1.22
PPP 2.4.0
Linux C Library 2.2.2
Dynamic linker (ldd) 2.2.2
Procps 2.0.7
Net-tools 1.57
Console-tools 0.3.3
Sh-utils 2.0
Modules Loaded NVdriver parport_pc parport autofs4 dmfe ide-scsi
scsi_mod ide-cd cdrom









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