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Date: Mon, 23 Jul 2001 10:30:50 +0200
From: =?iso-8859-1?Q?J=F6rn?= Nettingsmeier 
	<nettings@folkwang-hochschule.de>
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To: Andrew Friedley <saai@swbell.net>, linux-kernel@vger.kernel.org
CC: netfilter-devel@lists.samba.org, nettings@folkwang-hochschule.de
Subject: Re: pppoe patch in 2.4.7 results - still problem
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hello everyone !

i have also upgraded to 2.4.7, and it looks like all the pppoe fixes
from davem and michael ostrowski are included. however, the problem
remains :(
my oops is similar to the one andrew reports.

it can be triggered by opening an ftp session on a box behind the
router to another box on the internet and issuing crtl-c during an
ftp operation. at that moment, the router freezes, giving an oops
like the one below.

at first i reported this to the netfilter lists, because it seems it
can only be triggered when forwarding a connection. when i open an
ftp session on the router itself, i haven't been able to make it
oops.
so there seems to be at least an interaction between
netfilter/ip-forwarding and the pppoe bug.

please keep me cc:ed on follow-ups, i only read the archives.
thanks.

all the best,

j?rn




Andrew Friedley wrote:

> In response to the pppoe patch to try to fix panics with pppoe and smp:
> When running napster/napigator from a windows machine on my LAN, the router
> running 2.4.7 still panics.  It has not been long enough to tell if the
> "random" panics have been fixed for sure, but so far, so good - 1 day, 4
> hour uptime right now.  Here is a paste of a napster-induced panic with
> kernel 2.4.7 followed by the ksymoops output.
> 
> Unable to handle kernel paging request at virtual address 00002e
> c8
> *pde = 00000000
> Oops: 0000
> CPU:    0
> EIP:    0010:[<c01d6fc3>]
> EFLAGS: 00010202
> eax: c6987de0   ebx: 00002ec8   ecx: 00000000   edx: 00002ec8
> esi: c51b96e0   edi: c605a060   ebp: 00000060   esp: c0297db8
> ds: 0018   es: 0018   ss: 0018
> Process swapper (pid: 0, stackpage=c0297000)
> Stack: ff6d22e0 c01d706b c51b96e0 ff6d22e0 c51b96e0 c01d7653 c51b96e0
> c12ad800
>        c51b96e0 0000000e c51b96e0 ffffffe6 c01da0f7 c51b96e0 00000020
> 00000004
>        c5235d40 0000000e c01ddfed c51b96e0 00000001 00000000 c51b96e0
> c01e7ea0
> Call Trace: [<c01d706b>] [<c01d7653>] [<c01da0f7>] [<c01ddfed>] [<c01e7ea0>]
> [<c01e7f60>] [<c01df228>]
>        [<c01e5450>] [<c01e7e83>] [<c01e7ea0>] [<c01e54aa>] [<c01df228>]
> [<c01e05dc>] [<c01e53e4>] [<c01e5450>]
>        [<c01e4488>] [<c01e462a>] [<c01e4488>] [<c01df228>] [<c01e42c7>]
> [<c01e4488>] [<c01da8ce>] [<c0116c8a>]
>        [<c0108680>] [<c0105180>] [<c0106d40>] [<c0105180>] [<c01051ac>]
> [<c0105212>] [<c0105000>]
> 
> Code: 8b 1b 8b 42 70 83 f8 01 74 0b f0 ff 4a 70 0f 94 c0 84 c0 74
> Kernel panic: Aiee, killing interrupt handler!
> In interrupt handler - not syncing
> 
> Unable to handle kernel paging request at virtual address 00002e
> *pde = 00000000
> Oops: 0000
> CPU:    0
> EIP:    0010:[<c01d6fc3>]
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00010202
> eax: c6987de0   ebx: 00002ec8   ecx: 00000000   edx: 00002ec8
> esi: c51b96e0   edi: c605a060   ebp: 00000060   esp: c0297db8
> ds: 0018   es: 0018   ss: 0018
> Process swapper (pid: 0, stackpage=c0297000)
> Stack: ff6d22e0 c01d706b c51b96e0 ff6d22e0 c51b96e0 c01d7653 c51b96e0
> c12ad800
>        c51b96e0 0000000e c51b96e0 ffffffe6 c01da0f7 c51b96e0 00000020
> 00000004
>        c5235d40 0000000e c01ddfed c51b96e0 00000001 00000000 c51b96e0
> c01e7ea0
> Call Trace: [<c01d706b>] [<c01d7653>] [<c01da0f7>] [<c01ddfed>] [<c01e7ea0>]
> [<c
> 01e7f60>] [<c01df228>]
>        [<c01e5450>] [<c01e7e83>] [<c01e7ea0>] [<c01e54aa>] [<c01df228>]
> [<c01e05
>        [<c01e4488>] [<c01e462a>] [<c01e4488>] [<c01df228>] [<c01e42c7>]
> [<c01e44
>        [<c0108680>] [<c0105180>] [<c0106d40>] [<c0105180>] [<c01051ac>]
> [<c01052
> Code: 8b 1b 8b 42 70 83 f8 01 74 0b f0 ff 4a 70 0f 94 c0 84 c0 74
> 
> >>EIP; c01d6fc3 <skb_copy_bits+47/1e8>   <=====
> Trace; c01d706b <skb_copy_bits+ef/1e8>
> Trace; c01d7653 <skb_copy_and_csum_dev+7b/cc>
> Trace; c01da0f7 <dev_change_flags+67/f8>
> Trace; c01ddfed <nf_iterate+41/84>
> Trace; c01e7ea0 <ip_setsockopt+d4/944>
> Code;  c01d6fc3 <skb_copy_bits+47/1e8>
> 00000000 <_EIP>:
> Code;  c01d6fc3 <skb_copy_bits+47/1e8>   <=====
>    0:   8b 1b                     mov    (%ebx),%ebx   <=====
> Code;  c01d6fc5 <skb_copy_bits+49/1e8>
>    2:   8b 42 70                  mov    0x70(%edx),%eax
> Code;  c01d6fc8 <skb_copy_bits+4c/1e8>
>    5:   83 f8 01                  cmp    $0x1,%eax
> Code;  c01d6fcb <skb_copy_bits+4f/1e8>
>    8:   74 0b                     je     15 <_EIP+0x15> c01d6fd8
> <skb_copy_bits+5c/1e8>
> Code;  c01d6fcd <skb_copy_bits+51/1e8>
>    a:   f0 ff 4a 70               lock decl 0x70(%edx)
> Code;  c01d6fd1 <skb_copy_bits+55/1e8>
>    e:   0f 94 c0                  sete   %al
> Code;  c01d6fd4 <skb_copy_bits+58/1e8>
>   11:   84 c0                     test   %al,%al
> Code;  c01d6fd6 <skb_copy_bits+5a/1e8>
>   13:   74 00                     je     15 <_EIP+0x15> c01d6fd8
> <skb_copy_bits+5c/1e8>
> 
> Kernel panic: Aiee, killing interrupt handler!

-- 
J?rn Nettingsmeier     
home://Kurf?rstenstr.49.45138.Essen.Germany      
phone://+49.201.491621
http://icem-www.folkwang-hochschule.de/~nettings/
http://www.linuxdj.com/audio/lad/
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