Re: [PATCH 3.12 69/72] Revert "fix minor infoleak in get_user_ex()"

From	Greg KH <greg@kroah.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 3.12 69/72] Revert "fix minor infoleak in get_user_ex()"
Date	2016-11-08 11:40 +0100
Message-ID	<sBbYR-8bd-3@gated-at.bofh.it> (permalink)
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On Mon, Nov 07, 2016 at 08:45:59AM -0800, Linus Torvalds wrote:
> So a patch something like this might be a safe way to fix the
> potential infoleak in older kernels.
> 
> THIS IS UNTESTED. It's a very obvious patch, though, so if it compiles
> it probably works. It just initializes the output variable with 0 in
> the inline asm description, instead of doing it in the exception
> handler.
> 
> It will generate slightly worse code (a few unnecessary ALU
> operations), but it doesn't have any interactions with the exception
> handler implementation.

It builds here, so I've queued it up for 4.4-stable, let's see if
the auto-builders have any problems with it.  Thanks for the patch.

greg k-h

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[PATCH 3.12 69/72] Revert "fix minor infoleak in get_user_ex()" Jiri Slaby <jslaby@suse.cz> - 2016-11-07 14:40 +0100
  Re: [PATCH 3.12 69/72] Revert "fix minor infoleak in get_user_ex()" Linus Torvalds <torvalds@linux-foundation.org> - 2016-11-07 18:10 +0100
    Re: [PATCH 3.12 69/72] Revert "fix minor infoleak in get_user_ex()" Greg KH <greg@kroah.com> - 2016-11-08 11:40 +0100

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