Re: [PATCH 0/5] i387: stable kernel backport

H. Peter Anvin
2012-02-22T22:35:08Z

On 02/22/2012 12:54 PM, Linus Torvalds wrote:
>
> This is a reasonably minimal backport of the i387 state save/restore bug.
>
> A few of the commits are just minimal "make it easier to backport" commits
> that don't necessarily fix anything on their own. And a few of the others
> are combinations of what is two commits in the development tree, because
> it turned out to be easier and cleaner that way.
>
> The last one is the one that fixes the x86-32 bug, but the preemption
> fixes are real fixes too, although they are probably not something that
> anybody has necessarily ever hit in reality because the race window is so
> small. Even so, if the fix itself isn't that important, the "make it
> easier to backport the main one" would still be a big argument for it.
>
> I *really* hope that the people who could reproduce this bug will test the
> back-port series too, since I never actually saw the bug personally to
> begin with. And again, big thanks to Raphael who helped pinpoint and debug
> this.
>

Okay, this patchset does *NOT* work. It fails immediately on my system.
I hadn't ever seen it fail so fast.

-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.