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Date:      Sat, 23 Dec 2023 05:05:19 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 275871] [unionfs] [nullfs] [zfs] corrupt filesystem
Message-ID:  <bug-275871-3630-j13RX5WbDF@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-275871-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-275871-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275871

Jason A. Harmening <jah@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jah@FreeBSD.org
           Assignee|fs@FreeBSD.org              |jah@FreeBSD.org

--- Comment #1 from Jason A. Harmening <jah@FreeBSD.org> ---
The fundamental issue here is that ZFS doesn't correctly respect
cnp->cn_namelen in its mkdir operation, which breaks unionfs shadow directo=
ry
creation.

I've filed https://github.com/openzfs/zfs/issues/15705 to address this
upstream, but in the meantime it can be worked around in unionfs using the
attached patch.

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