PAC key changes when kernel code is preempted

[Derrick McKee]

Hi,

I am noticing that when kernel code is preempted, PAC keys seem to
change when resuming execution.  For instance, when I read
APDAKeyHi_EL1 and APDAKeyLo_EL1, sleep, and read them again, the
values are different.  Is this the intended behavior?  If so, how can
I ensure that the keys do not change?  The different keys are causing
PAC authentication to fail on pointers signed using the stale key.
Thanks.

--
Derrick McKee
Email: derrick.mckee at gmail.com