linux-ext4 - [Bug 194567] ext4 no longer mounts

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Date:   Wed, 15 Feb 2017 06:29:12 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 194567] ext4 no longer mounts

https://bugzilla.kernel.org/show_bug.cgi?id=194567

Theodore Tso (tytso@....edu) changed:

           What    |Removed                     |Added
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                 CC|                            |tytso@....edu

--- Comment #3 from Theodore Tso (tytso@....edu) ---
Created attachment 254761
  --> https://bugzilla.kernel.org/attachment.cgi?id=254761&action=edit
ext4: fix fencepost in s_first_meta_bg validation

Oops, thanks for reporting the bug.  This fix should take care of your issue.

I was able to reproduce such a file system using:


export MKE2FS_FIRST_META_BG=2
mke2fs -t ext4 -b 4096 -N 90112 -I 128 -L DB -m 0 -O
dir_index,extent,filetype,flex_bg,^has_journal,large_file,^resize_inode,sparse_super,uninit_bg,meta_bg,^metadata_csum,^64bit
/tmp/test.img 8388608

I'm not sure how it got into that state, but I'm guess it involved online
resizing?

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