You can write down the stack trace adresses manually on a piece of paper and then look up the adresses after the next reboot and driver load in the kernel symbol table:
$ cat /proc/ksyms | sort | less
Unfortunately I couldn't do that as ksyms only includes the exported module symbols so I would have had to export all "private" dvb functions too. But I found another way to get the kernel oops message and to ksymoops it.
First two things I noticed:
° When I setup the network device and run tcpdump -ni dvb0_0 only, allone, nothing happens. I can dump as many packets as I want without any problems.
° The actual kernel hang only happens when I try to run the T-DSL Satellit proxy application (http://ipviasky.de/tsky/down/downtslinux.html) after having tcpdump'ed packets. After approx. half a minute I get that fatal oops. Seems that the driver has both problems with promisc mode and multiple network connections/filters..
Here's the oops:
Unable to handle kernel paging request at virtual address ccb37000
cca13113
*pde = 0bf3b067
Oops: 0002
CPU: 0
EIP: 0010:[<cca13113>] Tainted: P
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010216
eax: ffffffb8 ebx: 00000104 ecx: 3ffbdff3 edx: c91a4018
esi: c606c77d edi: ccb37000 ebp: ffffffb8 esp: cbf7fd4c
ds: 0018 es: 0018 ss: 0018
Process kupdated (pid: 7, stackpage=cbf7f000)
Stack: cca2f000 cca2f026 cca134b7 cca2f000 cca2f014 c5f64791 ffffffb8 cca2f000
cca30074 c5f6468d db5b00fb 00000104 c91a4018 cca13761 cca2f000 c5f6468d
c5f64000 0000068d c91a412c 00002000 c91a4124 cca138df c91a4018 c5f6468d
Call Trace: [<cca134b7>] [<cca13761>] [<cca138df>] [<cca22abc>] [<cca22095>]
[<cca22abc>] [<c011c5d0>] [<c011c413>] [<c011c23f>] [<c01088bb>] [<c01052a0>]
[<c01052a0>] [<c010adf8>] [<c01052a0>] [<c01052a0>] [<c01052cc>] [<c0105332>]
[<c0105000>] [<c010504f>]
Code: f3 a5 a8 02 74 02 66 a5 a8 01 74 01 a4 5e 5f c3 90 83 ec 04
>>EIP; cca13113 <[dvb-core]dvb_dmx_memcopy+13/24> <=====
>>edx; c91a4018 <_end+8e32794/c4dc7dc> >>esi; c606c77d <_end+5cfaef9/c4dc7dc> >>esp; cbf7fd4c <_end+bc0e4c8/c4dc7dc>
Trace; cca134b7 <[dvb-core]dvb_dmx_swfilter_section_packet+31f/49c> Trace; cca13761 <[dvb-core]dvb_dmx_swfilter_packet+12d/184> Trace; cca138df <[dvb-core]dvb_dmx_swfilter+df/11c> Trace; cca22abc <[dvb-bt8xx]dvb_bt8xx_tasklet+0/13> Trace; cca22095 <[dvb-bt8xx]dvb_bt8xx_task+35/58> Trace; cca22abc <[dvb-bt8xx]dvb_bt8xx_tasklet+0/13> Trace; c011c5d0 <bh_action+4c/88> Trace; c011c413 <tasklet_action+67/a0> Trace; c011c23f <do_softirq+6f/cc> Trace; c01088bb <do_IRQ+db/ec> Trace; c01052a0 <default_idle+0/34> Trace; c01052a0 <default_idle+0/34> Trace; c010adf8 <call_do_IRQ+5/d> Trace; c01052a0 <default_idle+0/34> Trace; c01052a0 <default_idle+0/34> Trace; c01052cc <default_idle+2c/34> Trace; c0105332 <cpu_idle+3e/54> Trace; c0105000 <_stext+0/0> Trace; c010504f <rest_init+4f/50>
Code; cca13113 <[dvb-core]dvb_dmx_memcopy+13/24> 00000000 <_EIP>: Code; cca13113 <[dvb-core]dvb_dmx_memcopy+13/24> <===== 0: f3 a5 repz movsl %ds:(%esi),%es:(%edi) <===== Code; cca13115 <[dvb-core]dvb_dmx_memcopy+15/24> 2: a8 02 test $0x2,%al Code; cca13117 <[dvb-core]dvb_dmx_memcopy+17/24> 4: 74 02 je 8 <_EIP+0x8> Code; cca13119 <[dvb-core]dvb_dmx_memcopy+19/24> 6: 66 a5 movsw %ds:(%esi),%es:(%edi) Code; cca1311b <[dvb-core]dvb_dmx_memcopy+1b/24> 8: a8 01 test $0x1,%al Code; cca1311d <[dvb-core]dvb_dmx_memcopy+1d/24> a: 74 01 je d <_EIP+0xd> Code; cca1311f <[dvb-core]dvb_dmx_memcopy+1f/24> c: a4 movsb %ds:(%esi),%es:(%edi) Code; cca13120 <[dvb-core]dvb_dmx_memcopy+20/24> d: 5e pop %esi Code; cca13121 <[dvb-core]dvb_dmx_memcopy+21/24> e: 5f pop %edi Code; cca13122 <[dvb-core]dvb_dmx_memcopy+22/24> f: c3 ret Code; cca13123 <[dvb-core]dvb_dmx_memcopy+23/24> 10: 90 nop Code; cca13124 <[dvb-core]dvb_dmx_swfilter_sectionfilter+0/74> 11: 83 ec 04 sub $0x4,%esp
<0>Kernel panic: Aiee: killing interrupt handler!
1 warning issued. Results may not be reliable.
I hope you've got an idea what's going wrong.. Thanks for your help, -André.
-- http://www.steinsoft.net cout << "Happy Coding!" << endl;
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