On Saturday 09 September 2006 07:20, you wrote:
> On Fri, Sep 01, 2006 at 06:52:39PM +0200, Ondrej Zary wrote:
> > Hello,
> > my home router crashed after about a month. It does this sometimes but
> > this time I was able to capture the oops. Here is the result of running
> > ksymoops on it (took a photo of the screen and then manually converted to
> > plain-text). Does it look like a bug or something other?
>
> I have another problem with your oops. It looks like you used a /proc/ksyms
> from another running kernel. The symbol decoding does not match the code.
> For instance, in the disassembled code, you'll see that two functions are
> indicated for the same sequence of instructions (init_or_cleanup then
> ip_conntrack_protocol_register). And the difference does not look like a
> small offset, since neither of those functions seem to produce comparable
> code here.

Sorry, it's the first time I tried to use ksymoops (was reporting only 2.6 
oopses before) and I probably screwed up. The problem is that there is 
no /proc/ksyms (maybe because CONFIG_MODULES is disabled?):

root@router:~# ls -l /proc/k*
-r-------- 1 root root 33558528 2006-09-09 11:58 /proc/kcore
-r-------- 1 root root        0 2006-09-07 14:32 /proc/kmsg

I also didn't have the System.map file but found it in the tree on my desktop 
machine (where that kernel was compiled) - haven't touched that directory 
since the kernel compile so it should be correct one.

> You should backup the /proc/ksyms from your currently running kernel, and
> reuse it to decode the next oops when it occurs. BTW, could you provide
> the full config file and tell us what version of GCC you're using ? Maybe
> we can try to find the same code sequence in a module and identify it
> without waiting for further oops.

I've used GCC 2.95.3. Attached is dmesg and config file.

>
> > ksymoops 2.4.11 on i486 2.4.31.  Options used
> >      -V (default)
> >      -k /proc/ksyms (default)
> >      -l /proc/modules (default)
> >      -o /lib/modules/2.4.31/ (default)
> >      -m System.map (specified)
> >
> > Error (regular_file): read_ksyms stat /proc/ksyms failed
> > No modules in ksyms, skipping objects
> > No ksyms, skipping lsmod
> > Unable to handle kernel paging request at virtual address c2000000
> > *pde = 00000000
> > Oops: 0000
> > CPU:    0
> > EIP:    0010:[<c01eeb9e>]    Not tainted
> > Using defaults from ksymoops -t elf32-i386 -a i386
> > EFLAGS: 00010a96
> > eax: db1cec0a   ebx: 7af4a90b   ecx: fff113e8   edx: 00000008
> > esi: c1ffffe8   edi: c17835a4   ebp: c0b4b8b4   esp: c0227cd0
> > ds: 0018   es: 0018   ss: 0018
> > Process swapper (pid: 0, stackpage=c0227000)
> > Stack: fd00a8c0 c17835a4 c01e6587 c0227ce8 00000008 0000a0c5 0000dff0
> > 0000200f c01e8757 0000dff0 0000200f 00005f3a 00000000 00000028 c1783590
> > c0b4b8b4 c01e7162 c1783590 00000028 c0b4b8b4 00000000 00000006 c0b4b810
> > 00000000 Call Trace:    [<c01e6587>] [<c01e8757>] [<c01e7162>]
> > [<c01e72ea>] [<c017fda8>] [<c01baca0>] [<c01e5ed4>] [<c01baca0>]
> > [<c01e5fba>] [<c01baca0>] [<c01afe00>] [<c01baca0>] [<c01baca0>]
> > [<c01b00d0>] [<c01baca0>] [<c01b8270>] [<c01b9652>] [<c01baca0>]
> > [<c01b8270>] [<c01b82ba>] [<c01b0110>] [<c01b05dc>] [<c01b8214>]
> > [<c01b8270>] [<c01b7220>] [<c01b739b>] [<c01b7220>] [<c01b0110>]
> > [<c01b70a6>] [<c01b7220>] [<c01a87bb>] [<c01a885d>] [<c01a8970>]
> > [<c011427a>] [<c01081cd>] [<c0105250>] [<c010a3b8>] [<c0105250>]
> > [<c0105273>] [<c01052d8>] [<c0105000>] [<c0105027>]
> > Code: 8b 5e 18 11 d8 8b 5e 1c 11 d8 8d 76 20 49 75 d3 83 d0 00 89
> >
> > >>EIP; c01eeb9e <init_or_cleanup+15e/160>   <=====
> > >>
> > >>esp; c0227cd0 <bdf_prm+30/40>
> >
> > Trace; c01e6587 <icmp_timestamp+47/f0>
> > Trace; c01e8757 <inet_sock_release+57/80>
> > Trace; c01e7162 <inet_rtm_newaddr+42/190>
> > Trace; c01e72ea <devinet_ioctl+3a/680>
> > Trace; c017fda8 <ei_start_xmit+248/260>
> > Trace; c01baca0 <sfq_dequeue+e0/1c0>
> > Trace; c01e5ed4 <icmp_send+84/350>
> > Trace; c01baca0 <sfq_dequeue+e0/1c0>
> > Trace; c01e5fba <icmp_send+16a/350>
> > Trace; c01baca0 <sfq_dequeue+e0/1c0>
> > Trace; c01afe00 <nf_iterate+0/80>
> > Trace; c01baca0 <sfq_dequeue+e0/1c0>
> > Trace; c01baca0 <sfq_dequeue+e0/1c0>
> > Trace; c01b00d0 <nf_hook_slow+80/150>
> > Trace; c01baca0 <sfq_dequeue+e0/1c0>
> > Trace; c01b8270 <htb_timer+30/50>
> > Trace; c01b9652 <htb_dump_class+22/260>
> > Trace; c01baca0 <sfq_dequeue+e0/1c0>
> > Trace; c01b8270 <htb_timer+30/50>
> > Trace; c01b82ba <htb_rate_timer+2a/120>
> > Trace; c01b0110 <nf_hook_slow+c0/150>
> > Trace; c01b05dc <eth_header+2c/120>
> > Trace; c01b8214 <htb_requeue+114/140>
> > Trace; c01b8270 <htb_timer+30/50>
> > Trace; c01b7220 <htb_classify+f0/110>
> > Trace; c01b739b <htb_debug_dump+15b/300>
> > Trace; c01b7220 <htb_classify+f0/110>
> > Trace; c01b0110 <nf_hook_slow+c0/150>
> > Trace; c01b70a6 <L2T+26/30>
> > Trace; c01b7220 <htb_classify+f0/110>
> > Trace; c01a87bb <netif_receive_skb+db/140>
> > Trace; c01a885d <process_backlog+3d/110>
> > Trace; c01a8970 <net_rx_action+40/110>
> > Trace; c011427a <do_softirq+5a/b0>
> > Trace; c01081cd <do_IRQ+9d/b0>
> > Trace; c0105250 <default_idle+0/30>
> > Trace; c010a3b8 <call_do_IRQ+5/d>
> > Trace; c0105250 <default_idle+0/30>
> > Trace; c0105273 <default_idle+23/30>
> > Trace; c01052d8 <cpu_idle+38/50>
> > Trace; c0105000 <_stext+0/0>
> > Trace; c0105027 <rest_init+27/30>
> >
> > Code;  c01eeb9e <init_or_cleanup+15e/160>
> > 00000000 <_EIP>:
> > Code;  c01eeb9e <init_or_cleanup+15e/160>   <=====
> >    0:   8b 5e 18                  mov    0x18(%esi),%ebx   <=====
> > Code;  c01eeba1 <ip_conntrack_protocol_register+1/70>
> >    3:   11 d8                     adc    %ebx,%eax
> > Code;  c01eeba3 <ip_conntrack_protocol_register+3/70>
> >    5:   8b 5e 1c                  mov    0x1c(%esi),%ebx
> > Code;  c01eeba6 <ip_conntrack_protocol_register+6/70>
> >    8:   11 d8                     adc    %ebx,%eax
> > Code;  c01eeba8 <ip_conntrack_protocol_register+8/70>
> >    a:   8d 76 20                  lea    0x20(%esi),%esi
> > Code;  c01eebab <ip_conntrack_protocol_register+b/70>
> >    d:   49                        dec    %ecx
> > Code;  c01eebac <ip_conntrack_protocol_register+c/70>
> >    e:   75 d3                     jne    ffffffe3 <_EIP+0xffffffe3>
> > Code;  c01eebae <ip_conntrack_protocol_register+e/70>
> >   10:   83 d0 00                  adc    $0x0,%eax
> > Code;  c01eebb1 <ip_conntrack_protocol_register+11/70>
> >   13:   89 00                     mov    %eax,(%eax)
> >
> >  <0>Kernel panic: Aiee, killing interrupt handler!
> >
> > 1 error issued.  Results may not be reliable.
> >
> >
> > --
> > Ondrej Zary
>
> Regards,
> Willy

-- 
Ondrej Zary