linux-kernel - Re: [0/3] 2.6.27.52 stable review

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Date:	Sat, 14 Aug 2010 17:24:36 +1000
From:	Grant Coady <gcoady.lk@...il.com>
To:	Greg KH <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk
Subject: Re: [0/3] 2.6.27.52 stable review

On Fri, 13 Aug 2010 17:11:58 -0700, you wrote:

>On Sat, Aug 14, 2010 at 09:47:08AM +1000, Grant Coady wrote:
>> Hi Greg,
>> 
>> I scraped the patches out of the messages and edited Makefile :)
>> 
>> On Fri, 13 Aug 2010 16:07:12 -0700, you wrote:
>> 
>> >On Sat, Aug 14, 2010 at 08:36:34AM +1000, Grant Coady wrote:
>> >> On Fri, 13 Aug 2010 14:47:04 -0700, you wrote:
>> >> 
>> >> >NOTE!
>> >> >
>> >> >If I could get some people to please test this -rc release?  It contains
>> >> >a few core changes that I couldn't validate myself as I don't seem to
>> >> >have a machine that will even boot the .27 kernel anymore after my move.
>> 
>> Machine is running, but there's a lot of these in the dmesg:
>> 
>> WARNING: at include/linux/security.h:1826 acct_stack_growth+0xe7/0xf0()
>> Modules linked in:
>> Pid: 320, comm: khelper Not tainted 2.6.27.52-rc1a #57
>>  [<c011b54f>] warn_on_slowpath+0x5f/0x90
>>  [<c0145a53>] __alloc_pages_internal+0x93/0x420
>>  [<c01456bd>] buffered_rmqueue+0x11d/0x210
>>  [<c015e09a>] allocate_slab+0x4a/0xd0
>>  [<c015e149>] setup_object+0x29/0x30
>>  [<c015e204>] new_slab+0xb4/0x130
>>  [<c015e6ec>] __slab_alloc+0xac/0x120
>>  [<c01529e7>] acct_stack_growth+0xe7/0xf0
>>  [<c0152afa>] expand_stack+0x7a/0x90
>>  [<c014fc61>] do_anonymous_page+0x121/0x130
>>  [<c0150268>] handle_mm_fault+0x1b8/0x1e0
>>  [<c014e724>] get_user_pages+0xe4/0x270
>>  [<c0166ac9>] get_arg_page+0x49/0xc0
>>  [<c0166e5b>] copy_strings+0xdb/0x180
>>  [<c0166f29>] copy_strings_kernel+0x29/0x40
>>  [<c0167dae>] do_execve+0xde/0x1d0
>>  [<c0101f1f>] sys_execve+0x2f/0x60
>>  [<c0103036>] syscall_call+0x7/0xb
>>  [<c011007b>] ioapic_register_intr+0x10b/0x110
>>  [<c0106bfc>] kernel_execve+0x1c/0x30
>>  [<c0128efc>] ____call_usermodehelper+0x5c/0xc0
>>  [<c0128ea0>] ____call_usermodehelper+0x0/0xc0
>>  [<c0103b1b>] kernel_thread_helper+0x7/0x1c
>>  =======================
>> ---[ end trace 62e879f3daf4be6a ]---
>
>I'm guessing that 2.6.27.51 didn't cause those warnings as well?

Not in .51, the .51 dmesg is up now too:

 http://bugsplatter.id.au/kernel/boxen/deltree/dmesg-2.6.27.51a.gz


>
>That's a warning that current->mm is null.  I don't know enough about
>the mm subsystem to say if this is normal or not, and I don't at first
>glance, see how this patch could have caused this to happen.
>
>Anyone else have an idea?
>
>thanks,
>
>greg k-h
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