[Bug 268830] After 12.3 to 13.1 upgrade, with a ZFS dataset named 'tank/.': mount failures

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 08 Jan 2023 21:10:13 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268830

Graham Perrin <grahamperrin@freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|bugs@FreeBSD.org            |fs@FreeBSD.org
                 CC|                            |grahamperrin@freebsd.org
           Keywords|                            |needs-qa
            Summary|After 12.3 to 13.1 upgrade, |After 12.3 to 13.1 upgrade,
                   |failed to mount zfs         |with a ZFS dataset named
                   |filesystems                 |'tank/.': mount failures
             Status|New                         |Open

--- Comment #1 from Graham Perrin <grahamperrin@freebsd.org> ---
Consider this, from <https://openzfs.github.io/openzfs-docs/man/8/zfs.8.html>: 

    [A-Za-z_.:/ -]


Was bectl(8) in 12.3 used before the attempted upgrade?

<https://www.freebsd.org/cgi/man.cgi?query=bectl&sektion=8&manpath=FreeBSD+12.3-RELEASE>

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