2.4.20 Kernel panic in IDE-SCSI with CDROM drive

[Garrett Kajmowicz]

I recieved the appened kernel oops while attempting to mount a cdrom, as well 
as to dd the CDROM into a file.  This as occured under 2.4.19 as well as 
2.4.20 (reason why I tried upgrading).  The drive is bootable and works fine 
under Win98.

The oops in question locks the system up completely and causes Caps+Scroll 
lock lights to blink.

The drive in question is an HP CD-RW drive, attached via IDE using IDE-SCSI.
I have also attached information on my drive, should it be useful.

Thank you for all of yuor hard work.  Let me know if you need more info.
Garrett Kajmowicz
[e-mail]

Output from ksymoops (kernel was NOT tainted):

Unable to handle kernel NULL pointer dereference at virtual address 00000018
Oops: 0
CPU: 0
EIP: 0010:[<c01e702b>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: e7de5b40  ebx: c02df488  ecx: db5ef8c0  edx: db5ef8c0
esi: 00000000  edi: c02df488  ebp: 00000000  esp: c029fe90
ds: 00000018  es: 00000018  ss: 00000018
c01cda7c 000005dc e758ff7c 00000046 e7de5b40 00000000 00000000 c02df488
c02df444 c01cde6a c02df488 00000000 00000000 00000088 00000003 00000000
c026f414 c029ff00 00000000 aca424e9 c02df488 e7f46280 c02df444 db5ef8c0
Call trace: [<c01cda7c>] [<c01cde6a>] [<c01ce065>] [<c01ce345>] [<c01ce260>]
[<c011c3fe>] [<c0118842>] [<c0118756>] [<c0118594>] [<c0108a3e>] [<c01053a0>]
[<c010af98>] [<c01053a0>] [<c01053c3>] [<c0105432>] [<c0105000>]
Code: 8b 56 18 89 70 04 8b 46 1c 8b 7e 0c c7 46 10 00 00 00 00 89

>>EIP; c01e702b <idescsi_issue_pc+1b/1b0>   <=====

>>eax; e7de5b40 <_end+27b01428/28566968>
>>ebx; c02df488 <ide_hwifs+388/20a8>
>>ecx; db5ef8c0 <_end+1b30b1a8/28566968>
>>edx; db5ef8c0 <_end+1b30b1a8/28566968>
>>edi; c02df488 <ide_hwifs+388/20a8>
>>esp; c029fe90 <init_task_union+1e90/2000>

Trace; c01cda7c <ide_wait_stat+bc/130>
Trace; c01cde6a <start_request+1ba/260>
Trace; c01ce065 <ide_do_request+c5/1c0>
Trace; c01ce345 <ide_timer_expiry+e5/1c0>
Trace; c01ce260 <ide_timer_expiry+0/1c0>
Trace; c011c3fe <run_timer_list+ee/160>
Trace; c0118842 <bh_action+22/40>
Trace; c0118756 <tasklet_hi_action+46/70>
Trace; c0118594 <do_softirq+94/a0>
Trace; c0108a3e <do_IRQ+9e/a0>
Trace; c01053a0 <default_idle+0/30>
Trace; c010af98 <call_do_IRQ+5/d>
Trace; c01053a0 <default_idle+0/30>
Trace; c01053c3 <default_idle+23/30>
Trace; c0105432 <cpu_idle+42/60>
Trace; c0105000 <_stext+0/0>

Code;  c01e702b <idescsi_issue_pc+1b/1b0>
00000000 <_EIP>:
Code;  c01e702b <idescsi_issue_pc+1b/1b0>   <=====
   0:   8b 56 18                  mov    0x18(%esi),%edx   <=====
Code;  c01e702e <idescsi_issue_pc+1e/1b0>
   3:   89 70 04                  mov    %esi,0x4(%eax)
Code;  c01e7031 <idescsi_issue_pc+21/1b0>
   6:   8b 46 1c                  mov    0x1c(%esi),%eax
Code;  c01e7034 <idescsi_issue_pc+24/1b0>
   9:   8b 7e 0c                  mov    0xc(%esi),%edi
Code;  c01e7037 <idescsi_issue_pc+27/1b0>
   c:   c7 46 10 00 00 00 00      movl   $0x0,0x10(%esi)
Code;  c01e703e <idescsi_issue_pc+2e/1b0>
  13:   89 00                     mov    %eax,(%eax)

<0>Kernel panic: Aiee, killing interupt handler!

--------------------Enf od ksymoops output----------------------------
Panic message ended with:  In interupt handler - not syncing.

cat /proc/ide/drivers
ide-scsi version 0.9
ide-disk version 1.12

cat /proc/ide/ide1/config
pci bus 00 device 39 vid 1106 did 0571 channel 1
06 11 71 05 07 00 90 02 06 8a 01 01 00 20 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
01 d4 00 00 00 00 00 00 00 00 00 00 06 11 71 05
00 00 00 00 c0 00 00 00 00 00 00 00 ff 00 00 00
0b 52 09 3a 10 10 c0 00 a8 20 a8 20 11 00 20 20
07 07 07 e0 14 00 00 00 a8 a8 a8 a8 00 00 00 00
00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00
02 01 00 00 00 00 00 00 02 01 00 00 00 00 00 00
00 60 df 27 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00
06 00 71 05 06 11 71 05 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

cat /proc/ide/ide1/hdc/settings
name                    value           min             max             mode
----                    -----           ---             ---             ----
bios_cyl                0               0               1023            rw
bios_head               0               0               255             rw
bios_sect               0               0               63              rw
current_speed           34              0               69              rw
ide_scsi                0               0               1               rw
init_speed              12              0               69              rw
io_32bit                1               0               3               rw
keepsettings            0               0               1               rw
log                     0               0               1               rw
nice1                   1               0               1               rw
number                  2               0               3               rw
pio_mode                write-only      0               255             w
slow                    0               0               1               rw
transform               1               0               3               rw
unmaskirq               1               0               1               rw
using_dma               1               0               1               rw

cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 6
model name      : AMD Athlon(tm) XP 1800+
stepping        : 2
cpu MHz         : 1529.036
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 sse syscall mmxext 3dnowext 3dnow
bogomips        : 3047.42

Using version:
GNU assembler 2.13.2
gcc (GCC) 3.2.2
/lib/libc-2.3.1.so