linux-ext4 - Re: [PATCH 1/3] ext4: sanity check the block and cluster size at mount time

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Message-ID: <955b7ea8-2fb2-a958-bb8a-5b5003668765@kyup.com>
Date:   Fri, 18 Nov 2016 09:40:02 +0200
From:   Nikolay Borisov <kernel@...p.com>
To:     Theodore Ts'o <tytso@....edu>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:     bp@...en8.de, stable@...r.kernel.org
Subject: Re: [PATCH 1/3] ext4: sanity check the block and cluster size at
 mount time



On 11/18/2016 06:26 AM, Theodore Ts'o wrote:
> If the block size or cluster size is insane, reject the mount.  This
> is important for security reasons (although we shouldn't be just
> depending on this check).
> 
> Ref: http://www.securityfocus.com/archive/1/539661
> Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1332506
> Reported-by: Borislav Petkov <bp@...en8.de>
> Reported-by: Nikolay Borisov <kernel@...p.com>
> Signed-off-by: Theodore Ts'o <tytso@....edu>
> Cc: stable@...r.kernel.org

I just tested with the 3 patches applied on 4.9-rc4 and could still
reproduce the issue.
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