netdev - Re: 2.6.30-rc1: e1000: list

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Message-Id: <20090409.005106.96791990.davem@davemloft.net>
Date:	Thu, 09 Apr 2009 00:51:06 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	a.beregalov@...il.com, kernel-testers@...r.kernel.org,
	netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net
Subject: Re: 2.6.30-rc1: e1000: list_add corruption

From: Jarek Poplawski <jarkao2@...il.com>
Date: Thu, 9 Apr 2009 07:12:42 +0000

> On 09-04-2009 06:20, David Miller wrote:
>> From: Alexander Beregalov <a.beregalov@...il.com>
>> Date: Thu, 9 Apr 2009 08:16:00 +0400
>> 
>>> The host has two interfaces
>>> eth0 - e1000, eth1 - forcedeth.
>>> Both are not working after that messages.
>> 
>> It looks like the NAPI pending list is being modified in an illegal
>> state by forcedeth, and mid-stream to a list_del() an e1000 interrupt
>> comes in and this tries to schedule the e1000 NAPI context and we get
>> list corruption.
> 
> Good point! Feel free to send a patch. ;-)

A real shame, since I sent that analysis in hoping someone else
would do the rest of the digging and write the fix. :-/
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