Re-installing from scratch should resolve the issue. I suspect in most
cases if you install with the 21.10 installer (even though it has the
old kernel) as long as you install updates during the install this issue
probably won't hit you. It mostly seems to occur after a reboot and it's
loading data back from disk again.

As per some of the other comments you'll have a bit of a hard time
copying data off the old broken install.. you need to work through which
files/folders are corrupt and reboot and then exclude those from the
next rsync.


You could use the 22.04 daily build, it will eventually upgrade into the final 
release. However not usually recommended as there may be bugs or other problems 
in those daily images and/or it's not uncommon for the development release to 
sometimes break during the development cycle. Most of the time it doesn't and 
it usually works most of the time, but it's much more likely than using 21.10.

I'd try a re-install with 21.10 as I described. Obviously you'll need to
backup all of your data from the existing install first.

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https://bugs.launchpad.net/bugs/1906476

Title:
  PANIC at zfs_znode.c:335:zfs_znode_sa_init() // VERIFY(0 ==
  sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED,
  &zp->z_sa_hdl)) failed

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