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Date:      Mon, 16 Sep 2019 21:15:22 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 240619] makefs: "ffs_alloccg: map corrupted" error on small filesystem
Message-ID:  <bug-240619-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D240619

            Bug ID: 240619
           Summary: makefs: "ffs_alloccg: map corrupted" error on small
                    filesystem
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: emaste@freebsd.org

While investigating PR196390 I encountered an error during the creation of a
small filesystem:

% (cd /; makefs ~/image ~/metalog)
Calculated size of `/home/emaste/image': 131072 bytes, 8 inodes
Extent size set to 32768
/home/emaste/image: 0.1MB (256 sectors) block size 32768, fragment size 4096
        using 1 cylinder groups of 0.12MB, 4 blks, 256 inodes.
super-block backups (for fsck -b #) at:
 64,
Populating `/home/emaste/image'
makefs: ffs_alloccg: map corrupted: start 1 len 3 offset 206 206

metalog contained the example from PR196390,
. type=3Ddir uname=3Droot gname=3Dwheel mode=3D0755
./etc type=3Ddir uname=3Droot gname=3Dwheel mode=3D0755
./sbin type=3Ddir uname=3Droot gname=3Dwheel mode=3D0755
./usr type=3Ddir uname=3Droot gname=3Dwheel mode=3D0755
./usr/bin type=3Ddir uname=3Droot gname=3Dwheel mode=3D0755
./usr/bin/passwd type=3Dfile uname=3Droot gname=3Dwheel mode=3D04555 size=
=3D7000
./etc/passwd type=3Dfile mode=3D0644 uname=3Droot gname=3Dwheel

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