Subject: Re: 2.6.30-rc1: e1000: list_add corruption

From: David Miller <davem-fT/PcQaiUtIeIZ0/[email-masked]>
Date: Thu, 09 Apr 2009 00:51:06 -0700 (PDT)

From: Jarek Poplawski <[email-masked]>
Date: Thu, 9 Apr 2009 07:12:42 +0000

> On 09-04-2009 06:20, David Miller wrote:
>> From: Alexander Beregalov <[email-masked]>
>> 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. :-/