alignment faults in 3.6

Ben Hutchings bhutchings at
Fri Oct 12 12:13:27 EDT 2012

On Fri, 2012-10-12 at 16:47 +0100, David Laight wrote:
> > AC was so useless that it has now been reallocated to use by SMAP
> > <>.
> That is a long time coming!
> Wonder when it will appear in any cpus.
> How am I going to get root access when I can't get the kernel
> to execute code at address 0 any more :-)

Moving further off the topic: that is supposed to be prevented by a
separate feature, SMEP, which I think is available in current Intel CPUs
(Ivy Bridge).  Also, unprivileged users are generally not permitted to
mmap() at address 0.


Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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