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

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

[Ben Hutchings]

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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.

Ben.

-- 
Ben Hutchings
73.46% of all statistics are made up.

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Re: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame

[Greg KH]

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.

greg k-h

Re: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame

[Greg KH]

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?

greg k-h

Re: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame

[Ben Hutchings]

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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").

Ben.

-- 
Ben Hutchings
The most exhausting thing in life is being insincere.
                                                 - Anne Morrow Lindberg

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Re: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame

[Greg KH]

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

Re: [stable 6.12+] x86/pkeys: Simplify PKRU update in signal frame

[Larry Wei]

Thank you all! ❤️ Debian.

Probe URL: https://linux-hardware.org/?probe=070604e5c4
larry@zx2:~/Downloads$ fastfetch
         _,met$$$$$gg.          larry@zx2
      ,g$$$$$$$$$$$$$$$P.       ---------
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   ,$$P'              `$$$.     Host: GDC-1461 (TBD)
',$$P       ,ggs.     `$$b:    Kernel: Linux 6.12.37+deb13-amd64
`d$$'     ,$P"'   .    $$$     Uptime: 27 mins
  $$P      d$'     ,    $$P     Packages: 8774 (dpkg)
  $$:      $$.   -    ,d$$'     Shell: bash 5.2.37
  $$;      Y$b._   _,d$P'       DE: GNOME 48.2
  Y$$.    `.`"Y$$$$P"'          WM: Mutter (X11)
  `$$b      "-.__               WM Theme: Yaru
   `Y$$b                        Theme: Yaru [GTK2/3/4]
    `Y$$.                       Icons: Yaru [GTK2/3/4]
      `$$b.                     Font: Cantarell (11pt) [GTK2/3/4]
        `Y$$b.                  Cursor: Yaru (24px)
          `"Y$b._               Terminal: /dev/pts/10
              `""""             CPU: ZHAOXIN KaiXian KX-6000G/4 (4) @ 
3.30 GHz
                                GPU: Zhaoxin KX-6000G C-1080 GPU
                                Memory: 2.65 GiB / 30.60 GiB (9%)
                                Swap: 0 B / 980.00 MiB (0%)
                                Disk (/): 121.87 GiB / 466.48 GiB (26%) 
- ext4
                                Local IP (wlp5s0): 192.168.31.203/24
                                Battery (BASE-BAT): 100% [AC Connected]
                                Locale: en_US.UTF-8




On 7/2/25 16:06, Greg KH wrote:
> Ok, thanks, will go try that now...