The 5.4 and 5.10 kernels received a patch for PKRU handling, which
landed in 5.4.182 and 5.10.103.
See "x86/fpu: Correct pkru/xstate inconsistency" by Brian Geffon
<bgeffon@google.com>:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.182
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.103

R=jkummerow@chromium.org

Bug: v8:11974
Change-Id: Ie2d4840f9fbd902a0988c94c50ab450485d9117c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3506991Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79405}