> Unable to handle kernel NULL pointer dereference at virtual address
> 00000004
> [...]
>
> EIP; c0111720 <interruptible_sleep_on_timeout+30/60>

It accesses a wait queue pointer

>
> Trace; c2810add <[lanstreamer]streamer_open+2cd/8f0>
>
Uninitialized old style waitqueue?
I assume a
    init_waitqueue_head(&streamer_priv->srb_wait);
is missing somewhere.

I've checked the code from 2.4.2/drivers/net/tokenring/lanstreamer.c,
and I don't see a problem. Which driver to you use?

--
    Manfred

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