linux-kernel - Re: [stable] [PATCH] Fix 'flush_old_exec()/setup_new

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Message-ID: <20100204222522.GF20379@decadent.org.uk>
Date:	Thu, 4 Feb 2010 22:25:22 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Sven Joachim <svenjoac@....de>, Greg KH <greg@...ah.com>,
	stable-review@...nel.org, stable@...nel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [stable] [PATCH] Fix 'flush_old_exec()/setup_new_exec()' split

On Thu, 2010-02-04 at 11:11 -0800, Linus Torvalds wrote: 
> 
> On Thu, 4 Feb 2010, Sven Joachim wrote:
> > 
> > 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.
> 
> Ok. Greg - please skip these patches from stable for now. I'll try to 
> figure out what's up.
> 
> Sven/Ben: is /sbin/init (or wherever debian puts it) a regular ELF file? 
> Shared libraries? Anything at all special about it? I wonder why it seems 
> to have issues, when other 32-bit programs don't.

In a Debian initramfs, /init is a script interpreted by /bin/sh.

I've now tested i386 userland on an x86_64 kernel with all the relevant
patches on top of 2.6.32.7:

fdpic-respect-pt_gnu_stack-exec-protection-markings-when-creating-nommu-stack.patch
split-flush_old_exec-into-two-functions.patch
sparc-tif_abi_pending-bit-removal.patch
x86-get-rid-of-the-insane-tif_abi_pending-bit.patch
fix-flush_old_exec-setup_new_exec-split.patch
powerpc-tif_abi_pending-bit-removal.patch

This works perfectly, so far as I can see.

Ben.

-- 
Ben Hutchings
friends: People who know you well, but like you anyway.


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