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Subject: [Bug 211823] [patch] fsck_ffs incorrectly failing in check_cgmagic
Date: Fri, 09 Sep 2016 09:06:27 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211823

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kib@FreeBSD.org,
                   |                            |mckusick@mckusick.com

--- Comment #1 from Konstantin Belousov <kib@FreeBSD.org> ---
I do not see how this patch can be right.  You strip off high 16 bits from =
the
superblock' fs_ipg value and then compare truncated value to UFS1' niblk
cylgroup value.  This is plain wrong.

For UFS1, fs_ipg must be less than 2^15, so the values fit.

I have no idea what OpenBSD does there, but this is not how FreeBSD UFS
operates.  I suspect that binary layout of superblock or cg header on OpenB=
SD
is different.

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