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Date:      Tue, 21 Mar 2000 19:26:42 +0300
From:      Nikolai Saoukh <nms@otdel-1.org>
To:        Yoshinobu Inoue <shin@nd.net.fujitsu.co.jp>
Cc:        ilmar@ints.ru, freebsd-current@FreeBSD.ORG
Subject:   Re: -current sudden panics :(
Message-ID:  <20000321192642.B8237@Draculina.otdel-1.org>
In-Reply-To: <20000322005136H.shin@nd.net.fujitsu.co.jp>; from shin@nd.net.fujitsu.co.jp on Wed, Mar 22, 2000 at 12:51:36AM %2B0900
References:  <Pine.BSF.4.21.0003210801280.223-300000@ws-ilmar.ints.ru> <20000322005136H.shin@nd.net.fujitsu.co.jp>

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On Wed, Mar 22, 2000 at 12:51:36AM +0900, Yoshinobu Inoue wrote:

> > trace gave this:
> > arpint(c022537b,0,10,10,c0220010) at arpintr+0x9c
> > swi_net_next() at awi_net_next
> > 
> > I'm sending kernel config and dmesg in the attachment. I have INET6 there,
> > but it is not configured by ifconfig.
> > 
> > What's this and how can i avoid this panics?
> 
> Do you have any other hints for the problem?, because at least
> I couldn't reproduce it in my 4.0 and 5.0 machines.
> 
>   -Any kernel crash dump?
>   -Is there any typical situation or condition where the
>    problem happens?
>   -What is your LAN card?

The driver for his card does not set packet header pointer, thus
arp stuff see NULL pointer. small patch will cure this problem
(at least I hope so).

*** if_ed.c.old	Tue Mar 21 19:21:40 2000
--- if_ed.c	Tue Mar 21 19:23:27 2000
***************
*** 2728,2733 ****
--- 2728,2734 ----
  	 */
  	m->m_pkthdr.len = m->m_len = len - sizeof(struct ether_header);
  	m->m_data += sizeof(struct ether_header);
+ 	m->m_pkthdr.header = (void *)eh;
  
  	ether_input(&sc->arpcom.ac_if, eh, m);
  	return;


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