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Date: Mon, 3 Dec 2018 23:08:50 -0800 (PST)
From: Don Lewis <truckman@FreeBSD.org>
Subject: Re: stuck with ufs CHECK-HASH errors
To: Kirk McKusick <mckusick@mckusick.com>
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On  3 Dec, Kirk McKusick wrote:
> I am working on a fix. Hopefully have it in no more than a day.

I figured out that ufs_disk_fillout() and therefore sbread() in libufs
is never getting called.  Therefore the superblock used by cgput() is
all zeros.  If I change the call to ufs_disk_fillout_blank() in setup()
to ufs_disk_fillout() then things appear to work much better.