From: Sven Joachim <svenjoac@gmx.de>
To: Greg KH <greg@kroah.com>
Cc: Ben Hutchings <ben@decadent.org.uk>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       stable-review@kernel.org, stable@kernel.org,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: [stable] [PATCH] Fix 'flush_old_exec()/setup_new_exec()' split
References: <1265245849.3362.1.camel@localhost>
	<1265256174.2952.11.camel@localhost>
	<alpine.LFD.2.00.1002032135380.3707@localhost.localdomain>
	<1265272174.2952.20.camel@localhost>
	<20100204143848.GB15438@kroah.com>
Date: Thu, 04 Feb 2010 19:46:30 +0100
In-Reply-To: <20100204143848.GB15438@kroah.com> (Greg KH's message of "Thu, 4
	Feb 2010 06:38:48 -0800")
Message-ID: <87sk9gbzzt.fsf@turtle.gmx.de>
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On 2010-02-04 15:38 +0100, Greg KH wrote:

> On Thu, Feb 04, 2010 at 08:29:34AM +0000, Ben Hutchings wrote:
>> On Wed, 2010-02-03 at 21:39 -0800, Linus Torvalds wrote:
>> > 
>> > On Thu, 4 Feb 2010, Ben Hutchings wrote:
>> > > 
>> > > I'm using Debian i386 (i.e. 32-bit userland) with a 64-bit kernel.
>> > > After applying commit 221af7f to Debian's kernel source (approximately
>> > > equivalent to 2.6.32.7), the kernel fails to exec init.  After commit
>> > > 7ab02af it can exec init but that immediately segfaults:
>> > 
>> > It sounds like you have picked individual commits.
>> 
>> Yes - I'm one of the kernel package maintainers and we're sticking with
>> 2.6.32-stable.
>> 
>> > But you don't mention commit 05d43ed8a, which is also a required part of 
>> > the series.
>> > 
>> > So you _should_ have a combination of
>> >  - 221af7f87 ("Split 'flush_old_exec' into two functions")
>> >  - 05d43ed8a ("x86: get rid of the insane TIF_ABI_PENDING bit")
>> >  - 7ab02af42 ("Fix 'flush_old_exec()/setup_new_exec()' split")
>> > 
>> > (and there are also additional sparc/ppc versions of that TIF_ABI_PENDING 
>> > bit removal, but they shouldn't matter on your system)
>> 
>> Thanks.  If all the necessary patches are all in the stable queue then
>> we can pick them from there.
>
> They should all be there already, if not, please let me know.

It seems they are all there, but on my system with 64-bit kernel and
32-bit userland, 2.6.32.8-rc1 still panics in the way noticed by Ben.

Sven
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