Comment 1 for bug 1968096

Thanks for raising this. First of all I've noticed that the kernel in use is pretty outdated (package 'linux-meta-hwe-5.4 (5.4.0.90.101~18.04.80', changelog date 22 Oct 2021) and about half a year old - the current one is '5.4.0-107-generic' (package '5.4.0.107.121~18.04.92').
The delta between 5.4.0.107.121 and 5.4.0.90.101 are 12 updated kernels with ~2000 commits and more than 20 are NFS related and also some about vfs.
Hence I need to ask to update the system to the latest 'linux-image-generic-hwe-18.04' in 'bionic-updates' (5.4.0-107-generic) to be on the latest (and supported) level.
(A test with '5.4.0.108.122~18.04.93' from 'bionic-proposed' would be ideal on top.)

It also looks like a kernel dump was created, could you please share this dump (ideally from the current kernel) for further analysis (either via IBM Box or Canonical's anon. ftp 'http://archive.admin.canonical.com/')?