linux-kernel - Re: recent -git: BUG in free_thread

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Date:	Wed, 23 Jul 2008 13:31:09 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Vegard Nossum <vegard.nossum@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: recent -git: BUG in free_thread_xstate

On Wed, Jul 23, 2008 at 01:07:04PM -0700, Vegard Nossum wrote:
> Hi,
> 
> I just got this on c010b2f76c3032e48097a6eef291d8593d5d79a6 (-git from
> yesterday):

Do you see this in 2.6.26 aswell? I suspect it is coming from post 2.6.26
changes.

> 
> BUG: unable to handle kernel paging request at 00664381
> IP: [<c010b274>] free_thread_xstate+0x4/0x30
...

> EIP is at arch/x86/kernel/process.c:36:
> 
>         if (tsk->thread.xstate) {
> 

It looks like the kernel stack of that process got corrupted, corrupting the
task pointer in thread_info. Can you send us your config file?

thanks,
suresh
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