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From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Thu, 5 Oct 2017 14:07:31 +0200
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Subject: Re: [PATCH] vfs: hard-ban creating files with control characters in
 the name
To: Adam Borowski <kilobyte@angband.pl>
Cc: linux-kernel@vger.kernel.org
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> Anything with bytes 1-31,127 will get -EACCES.

You're making a mistake of catering to Unix shells which are pure garbage
as programming languages instead of fixing them or switching to saner
alternatives and then "fixing" kernel to sort-of workaround Unix shells
deficiencies.

Formally, you patch will break every program which creates git-style files
with filenames only fixing up for \0 and '/'. Now such program should
account for low ASCII as well.