Bug#1103397: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame

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From	Greg KH <gregkh@linuxfoundation.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1103397: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame
Date	Wed, 02 Jul 2025 10:10:01 +0200
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Cross-posted to 2 groups.

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On Wed, Jun 25, 2025 at 12:26:17AM +0200, Ben Hutchings wrote:
> On Fri, 2025-06-20 at 18:11 +0200, Greg KH wrote:
> > On Fri, Jun 20, 2025 at 05:56:29PM +0200, Greg KH wrote:
> > > On Sun, Jun 15, 2025 at 09:25:57PM +0200, Ben Hutchings wrote:
> > > > Hi stable maintainers,
> > > > 
> > > > Please apply commit d1e420772cd1 ("x86/pkeys: Simplify PKRU update in
> > > > signal frame") to the stable branches for 6.12 and later.
> > > > 
> > > > This fixes a regression introduced in 6.13 by commit ae6012d72fa6
> > > > ("x86/pkeys: Ensure updated PKRU value is XRSTOR'd"), which was also
> > > > backported in 6.12.5.
> > > 
> > > Now queued up, thanks.
> > 
> > Nope, this broke the build on 6.12.y and 6.15.y, so now dropped.  How
> > did you test this?
> 
> Sorry, I forgot to say this depends on the preceding commit 64e54461ab6e
> ("x86/fpu: Refactor xfeature bitmask update code for sigframe XSAVE").

Ok, thanks, will go try that now...

greg k-h

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Thread

Bug#1103397: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame Ben Hutchings <ben@decadent.org.uk> - 2025-06-15 22:10 +0200
  Bug#1103397: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame Greg KH <gregkh@linuxfoundation.org> - 2025-06-20 18:10 +0200
    Bug#1103397: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame Greg KH <gregkh@linuxfoundation.org> - 2025-06-20 18:30 +0200
      Bug#1103397: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame Ben Hutchings <ben@decadent.org.uk> - 2025-06-25 00:30 +0200
        Bug#1103397: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame Greg KH <gregkh@linuxfoundation.org> - 2025-07-02 10:10 +0200

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