[Bug 263407] RC3 Guided ZFS on root with encryption unmountable

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263407

--- Comment #26 from commit-hook@FreeBSD.org ---
A commit in branch stable/12 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=9a1efa766781c9dd1eb5975ce3a5c8a64d89cd18

commit 9a1efa766781c9dd1eb5975ce3a5c8a64d89cd18
Author:     Kyle Evans <kevans@FreeBSD.org>
AuthorDate: 2022-04-21 19:57:24 +0000
Commit:     Kyle Evans <kevans@FreeBSD.org>
CommitDate: 2022-04-24 03:49:22 +0000

    stand: zfs: handle holes at the tail end correctly

    This mirrors dmu_read_impl(), zeroing out the tail end of the buffer and
    clipping the read to what's contained by the block that exists.

    This fixes an issue that arose during the 13.1 release process; in
    13.1-RC1 and later, setting up GELI+ZFS will result in a failure to
    boot.  The culprit is this, which causes us to fail to load geom_eli.ko
    as there's a residual portion after the single datablk that should be
    zeroed out.

    PR:             263407
    Reviewed by:    tsoome

    (cherry picked from commit 914dc91d12198352b7878a88d30e2a6373a936e1)

 stand/libsa/zfs/zfsimpl.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

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