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Troubleshooting • Kernel hang with Bookworm using raspiBackup and CIFS

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I created a new Bookworm installation about a month ago. I have been using Raspibackup to back it up onto a NAS running Ubuntu 22.04, with the ZFS volume exported via Samba.

Unfortunately, when the backup succeeds, the operation systematically hangs in the "ls" command of the backup.
When the backup fails, it hangs in the "rm" command. Those processes cannot be killed or debugged.

I have been investigating this with the raspiBackup developer at
https://github.com/framps/raspiBackup/issues/760 .

So far, it only happens in raspiBackup. We have not been able to reduce it to a smaller test case, despite our best efforts.

There is no issue on Bullseye. I still have another SSD that I can plug into my SATA dock and boot with it.

It's clearly a regression in Bookworm, possibly in CIFS code, maybe elsewhere. I'm not really sure where to go from here for it to reach the proper developers.

To make things worse, nobody except me has been able to reliably reproduce the problem, though many others have seen it occasionally.

Statistics: Posted by madbrain76 — Sat Jun 08, 2024 2:00 am



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