Re: FAILED: patch "[PATCH] x86/shstk: Prevent deadlock during shstk sigreturn" failed to apply to 6.6-stable tree

["Edgecombe, Rick P" <rick.p.edgecombe@intel.com>]

On Mon, 2026-05-04 at 10:42 +0200, gregkh@linuxfoundation.org wrote:
> The patch below does not apply to the 6.6-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.
> 
> To reproduce the conflict and resubmit, you may use the following commands:
> 
> git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
> git checkout FETCH_HEAD
> git cherry-pick -x 9874b2917b9fbc30956fee209d3c4aa47201c64e
> # <resolve conflicts, build, test, etc.>
> git commit -s
> git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026050437-throat-unrivaled-2769@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
> 
> Possible dependencies:

This didn't apply because of the other related fix "x86: shadow stacks: proper
error handling for mmap lock" was missing from those stable trees. But it also
doesn't work because the vma refcount infrastructure the patch uses is missing. 

I just sent out backports for the other fix, but I'm still working on what to do
about this one.