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SubjectOops in vanilla 2.4.22 serial-usb driver
From
Date
This happened at the end of a Palm sync.
The machine went on, but USB is not irresponsive to USB attach/detach
since khubd is dead. The USB low-level driver is UHCI_ALT, compiled
in-kernel.

BTW, is there any way to restart khubd without rebooting?

Phil.

Kernel info:

vanilla 2.4.22 + vfs-lock + lvm-1.0.7 + kmsgdump 0.4.4
Linux ceramic 2.4.22 #1 SMP Tue Sep 16 18:14:44 PDT 2003 i686 unknown

Oops:

Unable to handle kernel NULL pointer dereference at virtual address 000009a4
ed341d05
*pde = 00000000
Oops: 0002
CPU: 1
EIP: 0010:[<ed341d05>] Tainted: P
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: 00000000 ebx: dae4bc90 ecx: 00000046 edx: 00000001
esi: 00000002 edi: dae4bc00 ebp: 00000000 esp: e7d1df48
ds: 0018 es: 0018 ss: 0018
Process khubd (pid: 10, stackpage=e7d1d000)
Stack: ed342e20 d16591e0 ed342e40 c01f2fd0 ce5eac00 dae4bc00 00000100 00000002
e7d2b000 00000001 00000000 ce5eac00 c01f539e e7d2b114 00000001 00000002
e7d2b000 e7d1f8a0 00000001 00000001 0000000a c01f565d e7d1f8a0 00000001
Call Trace: [<ed342e20>] [<ed342e40>] [<c01f2fd0>] [<c01f539e>] [<c01f565d>]
[<c01f584b>] [<c0105a54>]
Code: c7 80 a4 09 00 00 00 00 00 00 8d 4b 5c f0 ff 43 5c 0f 8e ae


>>EIP; ed341d05 <[usbserial]usb_serial_disconnect+6d/1ec> <=====

>>ebx; dae4bc90 <_end+1aae7f44/284a02b4>
>>edi; dae4bc00 <_end+1aae7eb4/284a02b4>
>>esp; e7d1df48 <_end+279ba1fc/284a02b4>

Trace; ed342e20 <[usbserial]usb_serial_driver+0/0>
Trace; ed342e40 <[usbserial].data.start+20/3c>
Trace; c01f2fd0 <usb_disconnect+88/128>
Trace; c01f539e <usb_hub_port_connect_change+4a/20c>
Trace; c01f565d <usb_hub_events+fd/29c>
Trace; c01f584b <usb_hub_thread+4f/f4>
Trace; c0105a54 <arch_kernel_thread+28/38>

Code; ed341d05 <[usbserial]usb_serial_disconnect+6d/1ec>
00000000 <_EIP>:
Code; ed341d05 <[usbserial]usb_serial_disconnect+6d/1ec> <=====
0: c7 80 a4 09 00 00 00 movl $0x0,0x9a4(%eax) <=====
Code; ed341d0c <[usbserial]usb_serial_disconnect+74/1ec>
7: 00 00 00
Code; ed341d0f <[usbserial]usb_serial_disconnect+77/1ec>
a: 8d 4b 5c lea 0x5c(%ebx),%ecx
Code; ed341d12 <[usbserial]usb_serial_disconnect+7a/1ec>
d: f0 ff 43 5c lock incl 0x5c(%ebx)
Code; ed341d16 <[usbserial]usb_serial_disconnect+7e/1ec>
11: 0f 8e ae 00 00 00 jle c5 <_EIP+0xc5> ed341dca <[usbserial]usb_serial_disconnect+132/1ec>

Module list:

nfsd 67264 12
visor 10624 0
usbserial 16224 0 [visor]
microcode 3744 0 (autoclean)
mousedev 3904 1
lvm-mod 59680 9
quota_v2 6376 2
nfs 69372 5
lockd 47648 1 [nfsd nfs]
sunrpc 65396 1 [nfsd nfs lockd]
vfat 9308 0 (unused)
msdos 4828 0
fat 29944 0 [vfat msdos]
isofs 17408 0 (unused)
udf 79392 0 (unused)
eeprom 3520 0 (unused)
mtp008 8064 0 (unused)
i2c-proc 5952 0 [eeprom mtp008]
i2c-viapro 3848 0 (unused)
i2c-core 12192 0 [eeprom mtp008 i2c-proc i2c-viapro]
syncfb 12098 0 (unused)
matroxfb_base 19040 63
matroxfb_DAC1064 5312 0 [matroxfb_base]
matroxfb_accel 7264 0 [matroxfb_base matroxfb_DAC1064]
matroxfb_misc 14528 0 [matroxfb_base matroxfb_DAC1064 matroxfb_accel]fbcon-cfb24 4192 0 [matroxfb_accel]
fbcon-cfb8 3264 0 [matroxfb_accel]
fbcon-cfb32 3616 0 [matroxfb_accel]
fbcon-cfb16 3904 0 [matroxfb_accel]
mga_vid 8256 0
mga 98576 1
agpgart 17696 3
emu10k1 56512 2
sound 52940 0 [emu10k1]
ac97_codec 11648 0 [emu10k1]
soundcore 3460 7 [emu10k1 sound]
apm 9504 0
softdog 1764 1
loop 8624 0
floppy 47072 0
sg 25092 0 (unused)
sr_mod 11896 0
cdrom 26976 0 [sr_mod]
st 27344 0
3c59x 25864 1
af_packet 13096 0 (unused)
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