linux-ext4 - Re: [PATCH V4] mke2fs: disallow creating FS on a loop mounted file with no option

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Date:	Mon, 16 Dec 2013 00:49:16 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	Kazuya Mio <k-mio@...jp.nec.com>
Cc:	Andreas Dilger <adilger@...ger.ca>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH V4] mke2fs: disallow creating FS on a loop mounted file
 with no option

On Thu, Nov 07, 2013 at 03:18:05PM +0900, Kazuya Mio wrote:
> When /etc/mtab is a symlink of /proc/mounts, mke2fs without -FF option
> can create a filesystem on the image file that is mounted.
> According to mke2fs man page, we should specify -FF option in this case.
> 
> This patch protects filesystem from unintended mke2fs caused by human error.
> 
> How to reproduce:
>   # mke2fs -t ext4 -Fq fs.img
>   # mount -o loop fs.img /mnt/mp1
>   # mke2fs -t ext4 -Fq fs.img && echo "mke2fs success"
>   mke2fs success
> 
> Signed-off-by: Kazuya Mio <k-mio@...jp.nec.com>

Thanks, applied.

						- Ted
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