Created attachment 196318 [details]
Screenshot of the panic message
After updating to 11.2-RELEASE, FreeBSD panics when there is heavy disk activity on a GELI volume with soft updates enabled.
I can reproduce this by duplicating a 8TB volume via rsync to the target disk, it panics every time with the same message:
"panic: softdep_deallocate_dependencies: dangling deps"
Disabling soft updates (tunefs -n disable) will allow the operation to finish.
The system is stable otherwise (memtest86 returns ok after a night of testing), and the backup worked flawlessly on 11.1 and a volume without GELI on 11.2.
Attached you will find a screenshot of the panic, unfortunately I was not able to get this in text form.
There has also been a second report with the same issue on reddit:
Please let me know if I can provide any further information, I am happy to help to get this cleared up.
I did some further digging and it seems that GELI is not necessary to reproduce the panic.
I opened a separate bug report with a more detailed description: