From: Pavel Machek <pavel@ucw.cz>
To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
eric.dumazet@gmail.com, xiyou.wangcong@gmail.com, fw@strlen.de
Subject: Re: [PATCH] proc: reject "." and ".." as filenames
Date: Sun, 11 Mar 2018 22:30:58 +0100 [thread overview]
Message-ID: <20180311213057.GA3769@amd> (raw)
In-Reply-To: <20180310001223.GB12443@avx2>
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On Sat 2018-03-10 03:12:23, Alexey Dobriyan wrote:
> Various subsystems can create files and directories in /proc
> with names directly controlled by userspace.
>
> Which means "/", "." and ".." are no-no.
>
> "/" split is already taken care of, do the other 2 prohibited names.
Hmm, patch is probably good idea, but now it means that userspace can
trigger WARN()s, and can hide objects from root by naming them '.' and
'..'... which is not good.
If you know where this happens, it would be nice to fix them in
addition to this patch.
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2018-03-11 21:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-10 0:12 [PATCH] proc: reject "." and ".." as filenames Alexey Dobriyan
2018-03-10 0:19 ` Florian Westphal
2018-03-11 21:30 ` Pavel Machek [this message]
2018-03-11 21:35 ` Alexey Dobriyan
2018-03-11 21:41 ` Pavel Machek
2018-03-12 23:00 ` Andrew Morton
2018-03-13 7:20 ` Alexey Dobriyan
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