[Bug 230732] Panic when using soft updates on a GELI volume in 11.2

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sat Aug 18 14:30:18 UTC 2018


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230732

            Bug ID: 230732
           Summary: Panic when using soft updates on a GELI volume in 11.2
           Product: Base System
           Version: 11.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: 2t8mr7kx9f at protonmail.com

Created attachment 196318
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=196318&action=edit
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:
https://www.reddit.com/r/freebsd/comments/8uylxc/softdep_panics_on_112release/

Please let me know if I can provide any further information, I am happy to help
to get this cleared up.

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