I can repro this with the latest Focal kernel on:
description: PowerNV
product: 8247-22L (IBM Power System S822L)
Trying to see if I can repro it upstream.
FWIW my opening hypothesis is that something in a percpu data structure
isn't getting updated over hotplug.
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https://bugs.launchpad.net/bugs/1927076
Title:
IPv6 TCP in reuseport_bpf_cpu from ubuntu_kernel_selftests/net crash
P8 node entei (Oops: Exception in kernel mode, sig: 4 [#1])
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