Bug#1022202: linux: rebuild upgrades of running kernel breaks module loading

[Christian Göttsche <cgzones@googlemail.com>]

source: linux
version: 6.0.2-1+b1
severity: important

Upgrading the package of the currently running kernel, e.g. for
rebuilds like 6.0.2-1+b1, breaks module loading until the next reboot.
Trying to load modules by applications, e.g. qemu, will fail:

Oct 21 22:23:23 debianHome kernel: BPF:          type_id=1457 bits_offset=0
Oct 21 22:23:23 debianHome kernel: BPF:
Oct 21 22:23:23 debianHome kernel: BPF: Invalid name
Oct 21 22:23:23 debianHome kernel: BPF:
Oct 21 22:23:23 debianHome kernel: failed to validate module [tun] BTF: -22

Maybe this is hard to fix, due to signature changes, so maybe the
postinst should print a strong reboot recommendation?