https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230962
Bug ID: 230962
Summary: Kernel panic when writing extended attributes with
soft updates enabled
Product: Base System
Version: 11.2-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 196617
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=196617&action=edit
A screenshot of the panic message.
This is a continuation of the following bugreport:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230732
I did some digging to try and get to the root cause. It appears that it has
nothing to do with GELI, I can also reproduce this on a plain UFS volume. The
culprit seem to be extended attributes.
Freebsd panics reproducible with
"panic: softdep_deallocate_dependencies: dangling deps"
when using rsync with the -X option ("preserve extended attributes") to a
volume with soft updates enabled.
This appears to be some kind of race condition - transferring the files
one-by-one works, the panic occurs only when transferring the whole directory.
Turning off soft updates (-n disable) or using rsync without -X prevents the
panic from occurring.
The exact same command worked with 11.1-RELEASE.
The attached screenshot shows the panic message. Please let me know if I can be
of further assistance!
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