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+=============================================================================
+FreeBSD-EN-23:22.vfs                                            Errata Notice
+                                                          The FreeBSD Project
+
+Topic:          ZFS snapshot directories not accessible over NFS
+
+Category:       core
+Module:         vfs
+Announced:      2023-XX-XX
+Affects:        FreeBSD 14.0
+Corrected:      2023-XX-XX XX:XX:XX UTC (stable/14, 14.0-STABLE)
+                2023-XX-XX XX:XX:XX UTC (releng/14.0, 14.0-RELEASE-pXX)
+                2023-XX-XX XX:XX:XX UTC (stable/13, 13.2-STABLE)
+
+For general information regarding FreeBSD Errata Notices and Security
+Advisories, including descriptions of the fields above, security
+branches, and the following sections, please visit
+<URL:https://security.FreeBSD.org/>.
+
+I.   Background
+
+ZFS is one of several filesystems available on FreeBSD.  ZFS supports many
+advanced features, including checksumming, transparent compression, and
+snapshots.
+
+Snapshots of a ZFS dataset can be accessed through a hidden directory,
+.zfs/snapshots, located in the root of the mounted dataset.
+
+II.  Problem Description
+
+When a process attempts to access a snapshot under /<dataset>/.zfs/snapshot,
+the snapshot is automounted.  However, without this patch, the automount does
+not properly set some metadata in the kernel's representation of the mount
+point, which results in the snapshot not being accessible over NFS.
+
+III. Impact
+
+Workflows which rely on ZFS snapshots being accessible over NFS are broken.
+
+IV.  Workaround
+
+No workaround is available.
+
+V.   Solution
+
+<insert solution here>
+
+Upgrade your system to a supported FreeBSD stable or release / security
+branch (releng) dated after the correction date.  A reboot is required after
+the upgrade procedure has been completed.
+
+Perform one of the following:
+
+1) To update your system via a binary patch:
+
+Systems running a RELEASE version of FreeBSD on the amd64 or arm64 platforms,
+or the i386 platfrom on FreeBSD 13 and earlier, can be updated via
+the freebsd-update(8) utility:
+
+# freebsd-update fetch
+# freebsd-update install
+# shutdown -r now
+
+2) To update your system via a source code patch:
+
+The following patches have been verified to apply to the applicable
+FreeBSD release branches.
+
+a) Download the relevant patch from the location below, and verify the
+detached PGP signature using your PGP utility.
+
+# fetch https://security.FreeBSD.org/patches/EN-23:22/vfs.patch
+# fetch https://security.FreeBSD.org/patches/EN-23:22/vfs.patch.asc
+# gpg --verify vfs.patch.asc
+
+b) Apply the patch.  Execute the following commands as root:
+
+# cd /usr/src
+# patch < /path/to/patch
+
+c) Recompile your kernel as described in
+<URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
+system.
+
+VI.  Correction details
+
+This issue is corrected as of the corresponding Git commit hash or Subversion
+revision number in the following stable and release branches:
+
+Branch/path                             Hash                     Revision
+-------------------------------------------------------------------------
+stable/14/                              62304a0c3b8b    stable/14-n265867
+releng/14.0/                            XXXXXXXXXXXX  releng/14.0-nXXXXXX
+stable/13/                              XXXXXXXXXXXX    stable/13-nXXXXXX
+-------------------------------------------------------------------------
+
+For FreeBSD 13 and later:
+
+Run the following command to see which files were modified by a
+particular commit:
+
+# git show --stat <commit hash>
+
+Or visit the following URL, replacing NNNNNN with the hash:
+
+<URL:https://cgit.freebsd.org/src/commit/?id=NNNNNN>
+
+To determine the commit count in a working tree (for comparison against
+nNNNNNN in the table above), run:
+
+# git rev-list --count --first-parent HEAD
+
+For FreeBSD 12 and earlier:
+
+Run the following command to see which files were modified by a particular
+revision, replacing NNNNNN with the revision number:
+
+# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
+
+Or visit the following URL, replacing NNNNNN with the revision number:
+
+<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
+
+VII. References
+
+<other info on the problem>
+
+<URL:https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275215>
+
+The latest revision of this advisory is available at
+<URL:https://security.FreeBSD.org/advisories/FreeBSD-EN-23:22.vfs.asc>