netdev - Re: oops with 2.6.23.1, marvel, software raid, reiserfs and samba

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Message-Id: <E1J3s76-000166-00@gondolin.me.apana.org.au>
Date:	Sun, 16 Dec 2007 19:56:56 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	akpm@...ux-foundation.org (Andrew Morton)
Cc:	jeff@...funit.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: oops with 2.6.23.1, marvel, software raid, reiserfs and samba

Andrew Morton <akpm@...ux-foundation.org> wrote:
>
>> Dec  7 17:20:53 sata_fileserver kernel: Code: 6c 39 df 74 59 8d b6 00 
>> 00 00 00 85 db 74 4f 8b 55 cc 8d 43 20 8b 0a 3b 48 18 0f 88 f4 05 00 
>> 00 89 ce 2b 70 18 8b 83 90 00 00 00 <0f> b6 50 0d 89 d0 83 e0 02 3c 
>> 01 8b 43 50 83 d6 ff 39 c6 0f 82

This means that skb->network_header == NULL so this line crashes:

	if (tcp_hdr(skb)->syn)
		offset--;

> That's a networking crash.  Do the oops traces which you're getting all look
> like this one?

What's spooky is that I just did a google and we've had reports
since 1998 all crashing on exactly the same line in tcp_recvmsg.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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