linux-l: Fwd: MPPP & Isdn4linux

[M . Dietrich]

hi kernel-hacker

ein bekannter von mir hat ein problem mit seinem mppp. anbei seine
anfrage in einer anderen liste:

I have configured Linux to dial our Internet Provider - and it works
perfectly for months - then I added Multiport-PPP and it also works
perfectly for a few hours or days - then suddenly the ipppd dies with
this error message:

kernel: Unable to handle kernel NULL pointer dereference at virtual
address c0000440
kernel: current->tss.cr3 =3D 00a86000, Xr3 =3D 00a86000
kernel: *pde =3D 00102067
kernel: *pte =3D 00000000
kernel: Oops: 0000
kernel: CPU:    0
kernel: EIP:    0010:[<02835d9e>]
kernel: EFLAGS: 00010286
kernel: eax: 00000000   ebx: 017b94c0   ecx: 00000000   edx: 01934018
kernel: esi: 017b9414   edi: 7fffffff   ebp: 01639018   esp: 01818ef8
kernel: ds: 0018   es: 0018   fs: 002b   gs: 002b   ss: 0018
kernel: Process ipppd (pid: 2951, process nr: 52, stackpage=3D01818000)
kernel: Stack: 00e33534 017b9530 00000014 017b9414 01639018 00000580
000000c0 00000000
kernel:        0282d28e 017b9414 017b9414 00e33534 00000000 00e33534
00000000 00000000
kernel:        0282d303 017b9530 00e33534 028272e6 00000000 00e33534
016cdb98 016cdbc4
kernel: Call Trace: [<0282d28e>] [<0282d303>] [<028272e6>] [<02846737>]
[<0283dbcb>] [<0283dbfa>] [immediate_bh+40/64]
kernel:        [do_bottom_half+59/112] [handle_bottom_half+11/32]
kernel: Code: 8b 80 40 04 00 00 85 c0 7c 06 39 f8 7d 02 89 c7 8b 92 f4
00
kernel: Aiee, killing interrupt handler

kernel: Unable to handle kernel NULL pointer dereference at virtual
address c0000440
=2E..
kernel: Aiee, killing interrupt handler

When I disable MPPP everything is stable and back to normal...

Some details about the configuration:

- Linux, Kernel 2.0.35, SuSE distribution
  (generic MP support included in kernel)
- Teles 16.3 ISDN card
- ipppd i2.2 pl 9anubis
- ippp0 is configured as
                =

Secure:                 on
Callback:               off
Reject before Callback: on
Callback-delay:         1
Dialmax:                5
Hangup-Timeout:         60
Incoming-Hangup:        off
ChargeHangup:           on
Charge-Units:           0
Charge-Interval:        0
Layer-2-Protocol:       hdlc
Layer-3-Protocol:       trans
Encapsulation:          syncppp
Slave Interface:        ippp1
Slave delay:            10
Master Interface:       None
Pre-Bound to:           Nothing

- ippp1 is configured as

Secure:                 on
Callback:               off
Reject before Callback: on
Callback-delay:         5
Dialmax:                1
Hangup-Timeout:         60
Incoming-Hangup:        on
ChargeHangup:           on
Charge-Units:           0
Charge-Interval:        0
Layer-2-Protocol:       hdlc
Layer-3-Protocol:       trans
Encapsulation:          syncppp
Slave Interface:        None
Slave delay:            10
Master Interface:       ippp0
Pre-Bound to:           Nothing
                =

- the ipppd for ippp0 is configured with

/dev/ippp0 /dev/ippp1
+mp
xxx.yy.zz.xxx:
user username
ipcp-accept-local
ipcp-accept-remote
noipdefault
useifip
defaultroute
-vj
-vjccomp
-ac
-pc
-bsdcomp
noccp
mru 1524
mtu 1500

- and I use the dynamic bandwith agent from
  http://www.compound.se/ibod.html

haben wir hier jemanden, der ihm helfen kann?
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