Hi,
I'm using kernel 2.5.8. When my Adaptec USB2connect for Notebooks USB 2.0 Cardbus
Adapter is plugged in to my Dell Inspiron 4100 notebook and I press the power switch
on, I get an Oops message during bootup.
jventura@debian:/var/log/ksymoops -k 20020507194439.ksyms -l 20020507194439.modules <
/root/kernel/linux-2.5.8/the_oops.txt
ksymoops 2.4.5 on i686 2.5.8. Options used
-V (default)
-k 20020507194439.ksyms (specified)
-l 20020507194439.modules (specified)
-o /lib/modules/2.5.8/ (default)
-m /boot/System.map-2.5.8 (default)
Unable to handle kernel NULL pointer dereference at virtual address 000005a
c8875b32
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c8875b32>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010202
eax: c887758c ebx: c7e68400 ecx: 0000000b edx: c7e6842c
esi: 00000000 edi: c7e68400 ebp: c02accc0 esp: c6647e2c
ds: 0018 es: 0018 ss: 0018
Stack: c7e68400 c02aca00 00000000 c887759d c7e68400 00000000 c011964e c7e68400
00000001 c02accd8 fffffff7 c01194da c02accd8 00000160 c02a5a60 0000000b
c6647e88 00000046 c01081b2 c6646000 00000001 00000000 c7e667e0 00000000
Call Trace: [<c887759d>] [<c011964e>] [<c01194da>] [<c01081b2>] [<c0106e53>]
[<c0120018>] [<c0126f65>] [<c0131616>] [<c0126a68>] [<c0131741>] [<c0106d07>]
Code: 66 c7 46 5a 03 00 c7 46 48 00 00 00 00 56 57 e8 a6 ef ff ff
>>EIP; c8875b32 <[ehci-hcd]end_unlink_async+a/68> <=====
>>eax; c887758c <[ehci-hcd]ehci_tasklet+0/30>
>>ebx; c7e68400 <_end+7b951f0/8587df0>
>>edx; c7e6842c <_end+7b9521c/8587df0>
>>edi; c7e68400 <_end+7b951f0/8587df0>
>>ebp; c02accc0 <softirq_vec+0/100>
>>esp; c6647e2c <_end+6374c1c/8587df0>
Trace; c887759d <[ehci-hcd]ehci_tasklet+11/30>
Trace; c011964e <tasklet_action+46/64>
Trace; c01194da <Letext+5a/a4>
Trace; c01081b2 <do_IRQ+96/a8>
Trace; c0106e53 <common_interrupt+1f/24>
Trace; c0120018 <Letext+59/91>
Trace; c0126f65 <generic_file_write+4fd/6d8>
Trace; c0131616 <do_readv_writev+1c6/25c>
Trace; c0126a68 <generic_file_write+0/6d8>
Trace; c0131741 <sys_writev+41/54>
Trace; c0106d07 <syscall_call+7/b>
Code; c8875b32 <[ehci-hcd]end_unlink_async+a/68>
00000000 <_EIP>:
Code; c8875b32 <[ehci-hcd]end_unlink_async+a/68> <=====
0: 66 c7 46 5a 03 00 movw $0x3,0x5a(%esi) <=====
Code; c8875b38 <[ehci-hcd]end_unlink_async+10/68>
6: c7 46 48 00 00 00 00 movl $0x0,0x48(%esi)
Code; c8875b3f <[ehci-hcd]end_unlink_async+17/68>
d: 56 push %esi
Code; c8875b40 <[ehci-hcd]end_unlink_async+18/68>
e: 57 push %edi
Code; c8875b41 <[ehci-hcd]end_unlink_async+19/68>
f: e8 a6 ef ff ff call ffffefba <_EIP+0xffffefba> c8874aec
<[ehci-hcd]qh_unput+0/4c>
<0> Kernel panic: Aiee, killing interrupt handler!
jventura@debian:/var/log/ksymoops$ cd /lib/modules/2.5.8/kernel/drivers/usb/host/
jventura@debian:/lib/modules/2.5.8/kernel/drivers/usb/host$ objdump --source -d
ehci-hcd.o
ehci-hcd.o: file format elf32-i386
Disassembly of section .text:
00000000 <dbg_hcs_params>:
0: 83 ec 40 sub $0x40,%esp
.
.
.
.
00001ac8 <end_unlink_async>:
1ac8: 57 push %edi
1ac9: 56 push %esi
1aca: 53 push %ebx
}
/*-------------------------------------------------------------------------*/
/* the async qh for the qtds being reclaimed are now unlinked from the HC */
/* caller must not own ehci->lock */
static void end_unlink_async (struct ehci_hcd *ehci)
{
1acb: 8b 7c 24 10 mov 0x10(%esp,1),%edi
struct ehci_qh *qh = ehci->reclaim;
1acf: 8b 77 08 mov 0x8(%edi),%esi
qh->qh_state = QH_STATE_IDLE;
1ad2: 66 c7 46 5a 03 00 movw $0x3,0x5a(%esi) <=====
qh->qh_next.qh = 0;
1ad8: c7 46 48 00 00 00 00 movl $0x0,0x48(%esi)
qh_unput (ehci, qh); // refcount from reclaim
1adf: 56 push %esi
1ae0: 57 push %edi
1ae1: e8 a6 ef ff ff call a8c <qh_unput>
.
.
.
.
I think I'm getting the Oops because struct ehci_qh *reclaim in struct ehci_hcd is not
initialized. I'm not sure what instance of struct ehci_qh to declare and if I should
put it in struct ehci_hcd so I can initialize *reclaim.
Thank you for any help you can extend to me.
Regards,
James Ventura
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