I finally found an explanation for my problem : the debian hotplug
script it not yet 2.6-aware and module-autoloading did't work any more
on 2.6* kernels...
Launching pppd/pppoatm without the speedtouch kernel module causes the
same oops also on 2.5.75-bk3.
My problem is now solved, but it remains that I really don't think that
I should have gotten a kernel oops !
Steps to reproduce:
1) Put something like this in /etc/ppp/peers/bug (probably only the last
two lines are necessary):
--------------------------
lock
persist
defaultroute
noipdefault
noauth
holdoff 4
maxfail 0
asyncmap 0
lcp-echo-interval 2
lcp-echo-failure 7
user "anonymous"
plugin /usr/lib/pppd/2.4.1/pppoatm.so
8.35
-------------------------
2) Do not load and/or remove any DSL+pppoatm kernel driver
3) pppd call bug
I really believe this is a kernel bug that should be fixed (and most
probably a pppoatm one : I don't remember ever getting such an error
when launching pppd with my pcmcia V90 modem disconnected), but from [1]
it's not clear to me who is the pppoatm kernel maintainer these days :
anybody knows to whom I should forward this bugreport ?
Best regards,
Vincent
Vince wrote:
> More information.
> Replying to myself... this oops :
>
> - doesn't occur up to 2.5.75-bk3 / 2.5.75-mm1
> - also happens on 2.6.0-test1 :
>
> -------------------------------------------------------------------
> Unable to handle kernel NULL pointer dereference at virtual address
> 00000026
> printing eip:
> c027014b
> *pde = 00000000
> Oops: 0000 [#1]
> CPU: 0
> EIP: 0060:[<c027014b>] Not tainted
> EFLAGS: 00210206
> EIP is at __vcc_connect+0x2b/0x230
> eax: 0000000a ebx: 00000000 ecx: 00000023 edx: c02e81bc
> esi: ce30d200 edi: 00000000 ebp: 00000023 esp: c8297e60
> ds: 007b es: 007b ss: 0068
> Process pppd (pid: 1097, threadinfo=c8296000 task=c8883880)
> Stack: 00000000 c0306a00 c8296000 00000000 cffcf1c0 ce30d200 c9106080
> c0270407
> ce30d200 00000000 00000008 00000023 00200246 0008d200 c8296000
> cffcf1c0
> c8297ee8 c9106080 c026d602 c9106080 00000000 00000008 00000023
> ffffffb3
> Call Trace:
> [<c0270407>] vcc_connect+0xb7/0x1f0
> [<c026d602>] pvc_bind+0xb2/0x150
> [<c0212a75>] sys_connect+0x85/0xc0
> [<c026d74f>] pvc_setsockopt+0x9f/0xf0
> [<c0212f28>] sys_setsockopt+0x78/0xc0
> [<c021360d>] sys_socketcall+0xcd/0x2a0
> [<c0109087>] syscall_call+0x7/0xb
> -----------------------------------------------------------------------
>
-
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This archive was generated by hypermail 2b29 : Wed Jul 23 2003 - 22:00:26 EST