linux-kernel - Re: 2.6.22-rc6-mm1 -- BUG - EIP: [<c01a77a1>] sysfs_addrm

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Message-ID: <469484E1.6040000@gmail.com>
Date:	Wed, 11 Jul 2007 16:21:05 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Miles Lane <miles.lane@...il.com>
CC:	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.22-rc6-mm1 -- BUG - EIP: [<c01a77a1>] sysfs_addrm_finish+0x1c2/0x226
 SS:ESP 0068:c5ff9db8

Miles Lane wrote:
>> Thanks a lot.  Just in case, if you remove the patch (patch -R -p1), the
>> oops goes away, right?
> 
> I double-checked.  I can boot fine after building without your patch.
> Also, I reproduced the initial BUG I reported (triggered by
> "modprobe -r ipw2200").

This is creepy.  I was able to reproduce the oops here with your
configuration file and making buffers for kallsyms static solved the
problem.  It isn't stack overflow.  At maximum those arrays added 254
bytes to the stack and when the oops occurs stack area was left more
than enough.  I'll keep looking into why that happened but the attached
patch should get us going on the original subject.

Thanks.

-- 
tejun

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