Dear all,
I cannot even understand if this kernel oops really belong to the irda section,
but it happened while I was fussing about with the irda modules and
ksymoops talks about line disciplines, so I'll post it anyway in the
hope that some brave soul is able to make something out of it...
[1.] One line summary of the problem:
ircomm-ircomm_tty oops and module locking
[2.] Full description of the problem/report:
got a kernel oops which did not block the machine; however, after
that the ircomm_tty module was locked into the kernel with a use
count of 1 and it was impossible to remove it; the irda/ircomm
stack was unusable after oops. The oops came at a non-determinable
moment (in fact I realized afterwards, when I saw that irda was
non-functional and I tried to remove it).
[3.] Keywords (i.e., modules, networking, kernel):
kernel networking irda ircomm
[4.] Kernel version (from /proc/version):
Linux version 2.2.10 ([EMAIL PROTECTED]) (gcc version 2.7.2.3) #4 Tue Jun 15
21:28:08 CEST 1999
[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)
Warning in compare_ksyms_lsmod, module i82365 is in lsmod but not in ksyms,
probably no symbols exported
Warning in compare_ksyms_lsmod, module isofs is in lsmod but not in ksyms,
probably no symbols exported
ad1848/cs4248 codec driver Copyright (C) by Hannu Savolainen 1993-1996
ad1848/cs4248 codec driver Copyright (C) by Hannu Savolainen 1993-1996
ad1848/cs4248 codec driver Copyright (C) by Hannu Savolainen 1993-1996
ad1848/cs4248 codec driver Copyright (C) by Hannu Savolainen 1993-1996
Unable to handle kernel NULL pointer dereference at virtual address 0000005c
current->tss.cr3 = 02081000, %cr3 = 02081000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c6876bfa>]
EFLAGS: 00013282
eax: c414d4a0 ebx: c38e3000 ecx: 00000000 edx: 00000000
esi: c38e3000 edi: c38e3100 ebp: c38e3000 esp: c05cbeac
ds: 0018 es: 0018 ss: 0018
Process pppd (pid: 23119, process nr: 86, stackpage=c05cb000)
Stack: c38e3000 c38e3000 c01f9370 c017d11e c38e3000 c38e3000 080640d0 c38e3000
00005423 00000000 c047e108 00000000 00000005 00000000 800018b2 00000000
7f1c0300 01000415 1a131100 170f1200 73000016 c01820f7 c38e3000 c01c0000
Call Trace: [<c017d11e>] [<c01820f7>] [<c01113c6>] [<c01a041f>] [<c018129c>]
[<c0181270>] [<c017fa18>]
[<c017fa54>] [<c0181344>] [<c01819ac>] [<c018229c>] [<c0181094>]
[<c0181b84>] [<c01801d8>] [<c01801a4>]
[<c017f058>] [<c017f44b>] [<c012d314>] [<c0109f74>]
Code: 8b 42 5c 85 c0 74 15 76 13 c7 42 5c 00 00 00 00 8b 82 80 00
Warning: trailing garbage ignored on Code: line
Text: 'Code: 8b 42 5c 85 c0 74 15 76 13 c7 42 5c 00 00 00 00 8b 82 80 00 '
Garbage: ' '
>>EIP: c6876bfa <END_OF_CODE+20e82/????>
Trace: c017d11e <tty_set_ldisc+102/1d0>
Trace: c01820f7 <set_termios+157/16c>
Trace: c01113c6 <schedule+14e/27c>
Trace: c01a041f <NR_TYPES+807/898>
Trace: c018129c <n_tty_open+0/a8>
Trace: c0181270 <n_tty_close+0/2c>
Trace: c017fa18 <n_tty_flush_buffer+0/3c>
Trace: c017fa54 <n_tty_chars_in_buffer+0/40>
Trace: c017f058 <tiocsetd+18/20>
Code: c6876bfa <END_OF_CODE+20e82/????> 00000000 <_EIP>: <===
Code: c6876bfa <END_OF_CODE+20e82/????> 0: 8b 42 5c movl
0x5c(%edx),%eax <===
Code: c6876bfd <END_OF_CODE+20e85/????> 3: 85 c0 testl
%eax,%eax
Code: c6876bff <END_OF_CODE+20e87/????> 5: 74 15 je
c6876c16 <END_OF_CODE+20e9e/????>
Code: c6876c01 <END_OF_CODE+20e89/????> 7: 76 13 jbe
c6876c16 <END_OF_CODE+20e9e/????>
Code: c6876c03 <END_OF_CODE+20e8b/????> 9: c7 42 5c 00 00 movl
$0x0,0x5c(%edx)
Code: c6876c08 <END_OF_CODE+20e90/????> e: 00 00
Code: c6876c0a <END_OF_CODE+20e92/????> 10: 8b 82 80 00 00 movl
0x80(%edx),%eax
Code: c6876c0f <END_OF_CODE+20e97/????> 15: 00
4 warnings issued. Results may not be reliable.
--------------------------------------------------------------------------------------------------------------------
(well I could'nt do any better than this...)
[6.] A small shell script or example program which triggers the
problem (if possible)
er....
[7.] Environment
Toshiba Satellite 2540CDS 96 Mbytes RAM 4.3 Gbytes disk w Linux 2.2.10
and stock irda modules + toshoboe 1.9
[7.1.] Software (add the output of the ver_linux script here)
Linux ax-nicb.axnet.it 2.2.10 #4 Tue Jun 15 21:28:08 CEST 1999 i586 unknown
Kernel modules 2.1.121
Gnu C 2.7.2.3
Binutils linux-2.8.1.0.1
Linux C Library 5.4.46
Dynamic linker ldd: version 1.9.9
Linux C++ Library 27.2.8
Linux C++ Library 27.2.8
Procps 1.2.7
Mount 2.9s
Net-tools 1.421
Kbd 0.94
Sh-utils 1.16
Modules Loaded opl3sa2 ad1848 mpu401 sound soundcore ircomm_tty ircomm
toshoboe irda beep ds i82365 pcmcia_core
[7.2.] Processor information (from /proc/cpuinfo):
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : 12
cpu MHz : 333.273633
fdiv_bug : no
hlt_bug : no
sep_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 mce cx8 sep mtrr pge mmx 3dnow
bogomips : 665.19
[7.3.] Module information (from /proc/modules):
opl3sa2 3424 0 (autoclean)
ad1848 15324 0 (autoclean) [opl3sa2]
mpu401 17840 0 (autoclean) [opl3sa2]
sound 56076 0 (autoclean) [opl3sa2 ad1848 mpu401]
soundcore 2216 7 (autoclean) [sound]
ircomm_tty 10192 0 (autoclean) (unused)
ircomm 8568 0 (autoclean) [ircomm_tty]
toshoboe 5456 1 (autoclean)
irda 57777 1 (autoclean) [ircomm_tty ircomm toshoboe]
beep 944 0 (autoclean) (unused)
ds 6180 2
i82365 23208 2
pcmcia_core 42060 0 [ds i82365]
[7.4.] SCSI information (from /proc/scsi/scsi)
[7.5.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):
this is what dmesg says upon irda startup.
IrDA (tm) Protocols for Linux-2.2 (Dag Brattli)
ToshOboe: Found 701 chip at 0xffe0 irq 11
ToshOboe: seting baud to 9600
IrDA: Registered device irda0
irmanager is not running!
ToshOboe: Using single tasks, version $Id: toshoboe.c,v 1.9 1999/06/29 14:21:06
root Exp $
Linux-IrDA: IrCOMM protocol ( revision:Tue May 18 03:11:39 1999 )
ircomm_tty: virtual tty driver for IrCOMM ( revision:Wed May 26 00:49:11 1999 )
[X.] Other notes, patches, fixes, workarounds:
I wish I had some.
Thank you
Nicola
------------------------------------------------------------------------
Nicola Bernardini
E-mail: [EMAIL PROTECTED]
Re graphics: A picture is worth 10K words -- but only those to describe
the picture. Hardly any sets of 10K words can be adequately described
with pictures.
