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Subject2.4.4, 2.4.4-ac1 and -ac3: oops loading future domain scsi module
Here I am with another, fresh oops that I encountered while exploring
new kernels. This time, the oops is generated when trying to load the
module for a very old (1993) Future Domain SCSI card. 2.4.3-ac7 was my
previous kernel and worked perfectly. Now, loading the module
generates the following OOPS:


ksymoops 2.3.7 on i686 2.4.4-ac3. Options used
-v /usr/src/linux/vmlinux (specified)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.4-ac3/ (default)
-m /usr/src/linux/ (default)

Unable to handle kernel NULL pointer dereference at virtual address 00000078
Oops: 0002
CPU: 0
EIP: 0010:[<c712a847>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010282
eax: 00000000 ebx: 00000142 ecx: c3c36a40 edx: 00000000
esi: c712cce0 edi: 00000148 ebp: 00003080 esp: c4579ec0
ds: 0018 es: 0018 ss: 0018
Process modprobe (pid: 5603, stackpage=c4579000)
Stack: c712cce0 00000001 00000001 00000000 c705bb3a c712cce0 c712cce0 00000001
00000001 00003080 00000286 00000000 c02e6cb8 00000000 00003080 00004df9
00000286 00000212 c712a000 00000001 00000001 00003080 c705c3dd c712cce0
Call Trace: [<c712cce0>] [<c705bb3a>] [<c712cce0>] [<c712cce0>] [<c712a000>]
[<c705c3dd>] [<c712cce0>] [<c712a000>] [<c712b986>] [<c712cce0>] [<c011364d>]
[<c711e000>] [<c712a060>] [<c0106bbb>]
Code: 89 42 78 c6 41 54 10 51 e8 0c f8 ff ff a1 b8 ca 12 c7 83 c4

>>EIP; c712a847 <[fdomain]fdomain_16x0_detect+1f7/2d0> <=====
Trace; c712cce0 <[fdomain]driver_template+0/7f>
Trace; c705bb3a <[scsi_mod]scsi_register_host+6a/2f0>
Trace; c712cce0 <[fdomain]driver_template+0/7f>
Trace; c712cce0 <[fdomain]driver_template+0/7f>
Trace; c712a000 <[snd-pcm-oss]__module_using_checksums+3692/36f2>
Trace; c705c3dd <[scsi_mod]scsi_register_module+2d/60>
Trace; c712cce0 <[fdomain]driver_template+0/7f>
Trace; c712a000 <[snd-pcm-oss]__module_using_checksums+3692/36f2>
Trace; c712b986 <[fdomain]init_this_scsi_driver+16/40>
Trace; c712cce0 <[fdomain]driver_template+0/7f>
Trace; c011364d <sys_init_module+4fd/5a0>
Trace; c711e000 <[snd-seq-midi]__module_parm_desc_input_buffer_size+11a0/1200>
Trace; c712a060 <[fdomain]print_banner+0/140>
Trace; c0106bbb <system_call+33/38>
Code; c712a847 <[fdomain]fdomain_16x0_detect+1f7/2d0>
00000000 <_EIP>:
Code; c712a847 <[fdomain]fdomain_16x0_detect+1f7/2d0> <=====
0: 89 42 78 mov %eax,0x78(%edx) <=====
Code; c712a84a <[fdomain]fdomain_16x0_detect+1fa/2d0>
3: c6 41 54 10 movb $0x10,0x54(%ecx)
Code; c712a84e <[fdomain]fdomain_16x0_detect+1fe/2d0>
7: 51 push %ecx
Code; c712a84f <[fdomain]fdomain_16x0_detect+1ff/2d0>
8: e8 0c f8 ff ff call fffff819 <_EIP+0xfffff819> c712a060 <[fdomain]print_banner+0/140>
Code; c712a854 <[fdomain]fdomain_16x0_detect+204/2d0>
d: a1 b8 ca 12 c7 mov 0xc712cab8,%eax
Code; c712a859 <[fdomain]fdomain_16x0_detect+209/2d0>
12: 83 c4 00 add $0x0,%esp


Then, Linux works quite normally. In lsmod, the module appears as

fdomain 12416 1 (initializing)

Now, why do I have intermixed calls to sound modules, I don't know. I
don't load kernel sound modules, since I have a ForteMedia 801 sound
card, that requires ALSA drivers.

This happens quite regularly, even if loading the fdomain module is
the first thing I do after reboot. It happens with 2.4.4, 2.4.4-ac1
and 2.4.4-ac3.

The machine is an oldish Athlon 500MHz, with a reasonably up-to-date
debian setup. The SCSI card has attached to it an old QIC-tape unit
and a Nikon negative scanner (but this last one can be off, and the
OOPS happens just the same)

I hope this helps. If I can be of help in providing more info or
testing eventual patches, I will be happy to do so.


* Se la Strada e la sua Virtu' non fossero state messe da parte,
* K * Carlo E. Prelz - che bisogno ci sarebbe
* di parlare tanto di amore e di rettitudine? (Chuang-Tzu)

----- End forwarded message -----

* Se la Strada e la sua Virtu' non fossero state messe da parte,
* K * Carlo E. Prelz - che bisogno ci sarebbe
* di parlare tanto di amore e di rettitudine? (Chuang-Tzu)
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