The issue seems to stem from reading
/proc/net/rtl8822ce/<interface>/sec_cam. This read takes about 40s
before printing seemingly null data, and the io lockup causes issues
with the realtime kernel. I'm not exactly sure why it's causing a null
pointer deref and rt_mutex backtrace though. The rtl8822ce driver is
definitely hitting timeouts when trying to read the sec_cam registers,
but that seems like something the mutexes should handle gracefully.

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https://bugs.launchpad.net/bugs/2103748

Title:
  ubuntu_stress_smoke_test.procfs and ubuntu_ltp:read_all_proc panics
  with realtime flavour (AGX, Nano)

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