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SubjectOops in 2.4.0 with hdX=cdrom
Hi,

I got the following Oops with a stock 2.4.0 kernel when specifying
'hdd=cdrom' as lilos commandline. hdd is a Pioneer DR-A24X and
ATA probing confuses it without 'hdd=noprobe hdd=cdrom'. I've also tested
with 'hdc=cdrom' (which is a LG CRD-8482B) and it oopsed, too. Without the
option the system boots, but I encounter the usual 'hdd: lost interrupt'.

System:
- Asus TX97XE (PIIX4 controller)
- AMD K6 233
- hdc is LG CRD-8482B
- hdd is Pioneer DR-A24X

ver_linux output:
Linux glashow 2.4.0 #2 Wed Jan 10 20:13:16 CET 2001 i586 unknown
Kernel modules 2.4.1
Gnu C 2.95.3
Gnu Make 3.79.1
Binutils 2.10.1.0.2
Linux C Library > libc.2.2
Dynamic linker ldd (GNU libc) 2.2
Procps 2.0.6
Mount 2.10q
Net-tools 2.05
Console-tools 0.2.3
Sh-utils 2.0.11
Modules Loaded ne 8390


If you need any further information please let me know.

Thanks for your help
Matthias


$ ksymoops -m /boot/System.map /home/rose/cdrom_oops
ksymoops 2.3.4 on i586 2.4.0. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.0/ (default)
-m /boot/System.map (specified)

Unable to handle kernel NULL pointer dereference at virtual address
00000063
c017c863
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c017c863>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: x026bfe4 ebx: 00000000 ecx: 00000006 edx: 00000004
esi: 00000005 edi: c026bfe4 ebp: c026bfe4 esp: c1119f50
ds: 0018 es: 0018 ss: 0018
Process swapper (pid: 1, stackpage=c119000)
Stack: c026bfe4 00000286 c0212ee0 c017c8a7 c026bfe4 c017ab4a 00000004
c026bfe4
00000007 c026bfe4 c1144a00 00000000 c1144940 c0183f73 c026bfe4
c0212ee0
00000001 c02605e0 000000ff c02601dc 0008e000 c02605e0 000000ff
00000001
Call Trace: [<c017c8a7>] [<c017ab4a>] [<c0183f73>] [<c0107007>]
[<c0107418>]
Code: f6 43 63 08 75 06 f6 43 6a 02 74 0e be 07 00 00 00 57 e8 12

>>EIP; c017c863 <config_drive_xfer_rate+af/e0> <=====
Trace; c017c8a7 <piix_dmaproc+13/2c>
Trace; c017ab4a <ide_register_subdriver+9a/f4>
Trace; c0183f73 <ide_cdrom_init+bf/1cc>
Trace; c0107007 <init+7/110>
Trace; c0107418 <kernel_thread+28/38>
Code; c017c863 <config_drive_xfer_rate+af/e0>
00000000 <_EIP>:
Code; c017c863 <config_drive_xfer_rate+af/e0> <=====
0: f6 43 63 08 testb $0x8,0x63(%ebx) <=====
Code; c017c867 <config_drive_xfer_rate+b3/e0>
4: 75 06 jne c <_EIP+0xc> c017c86f
<config_drive_xfer_rate+bb/e0>
Code; c017c869 <config_drive_xfer_rate+b5/e0>
6: f6 43 6a 02 testb $0x2,0x6a(%ebx)
Code; c017c86d <config_drive_xfer_rate+b9/e0>
a: 74 0e je 1a <_EIP+0x1a> c017c87d
<config_drive_xfer_rate+c9/e0>
Code; c017c86f <config_drive_xfer_rate+bb/e0>
c: be 07 00 00 00 mov $0x7,%esi
Code; c017c874 <config_drive_xfer_rate+c0/e0>
11: 57 push %edi
Code; c017c875 <config_drive_xfer_rate+c1/e0>
12: e8 12 00 00 00 call 29 <_EIP+0x29> c017c88c
<config_drive_xfer_rate+d8/e0>

Kernel panic: Attempted to kill init!

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