Looking at lttng-modules upstream I saw that this got fixed by them for Xenial in some middle way (that and there was a later patch to cast things to uint_64):
commit af59031181f353ba1b46d2a085fcb9b74c69c170
Author: Michael Jeanson <email address hidden>
Date: Fri Feb 5 15:21:55 2021 -0500
Looking at lttng-modules upstream I saw that this got fixed by them for Xenial in some middle way (that and there was a later patch to cast things to uint_64):
commit af59031181f353b a1b46d2a085fcb9 b74c69c170
Author: Michael Jeanson <email address hidden>
Date: Fri Feb 5 15:21:55 2021 -0500
fix: UTS_UBUNTU_ RELEASE_ ABI is close to overflow