netdev - Re: [PATCH net-next] af_unix: fix a fatal race with bit fields

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Message-ID: <1367514145.24411.8@snotra>
Date:	Thu, 2 May 2013 12:02:25 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Alan Modra <amodra@...il.com>
CC:	Eric Dumazet <eric.dumazet@...il.com>,
	netdev <netdev@...r.kernel.org>,
	Ambrose Feinstein <ambrose@...gle.com>,
	Paul Mackerras <paulus@...ba.org>,
	Anton Blanchard <anton@...ba.org>,
	<linuxppc-dev@...ts.ozlabs.org>, David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-next] af_unix: fix a fatal race with bit fields

On 04/30/2013 10:54:25 PM, Alan Modra wrote:
> On Tue, Apr 30, 2013 at 07:24:20PM -0700, Eric Dumazet wrote:
> > 	li 11,1
> > 	ld 0,0(9)
> > 	rldimi 0,11,31,32
> > 	std 0,0(9)
> > 	blr
> > 	.ident	"GCC: (GNU) 4.6.3"
> >
> > You can see "ld 0,0(9)" is used : its a 64 bit load.
> 
> Yup.  This is not a powerpc64 specific problem.  See
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52080
> Fixed in 4.8.0 and 4.7.3.

FWIW (especially if a GCC version check is added), it seems to have  
been fixed as far back as 4.7.1, not just 4.7.3.

-Scott
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