[Bug 275731] panic in zfs: VERIFY(buf[i] == 0) failed
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Date: Wed, 20 May 2026 21:01:26 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275731
John F. Carr <jfc@mit.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://bugs.freebsd.org/bu
| |gzilla/show_bug.cgi?id=2953
| |77
--- Comment #4 from John F. Carr <jfc@mit.edu> ---
I am convinced now that this is a bug with deduplication.
If I leave dedup=verify and disable the buf[0] assertion I get file corruption
during a parallel build, a .o file is full of nulls. The exact file is
unpredictable.
If I set dedup=off on the active filesystems everything is fine. No assertion
and no data loss. Tested on 15 and CURRENT.
Sometimes the data that should be 0 appears to be ASCII text interpreted as a
64 bit integer.
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