From: "Drew DeVault" <sir@cmpwn.com>
To: "Matthew Wilcox" <willy@infradead.org>
Cc: <linux-fsdevel@vger.kernel.org>, <linux-api@vger.kernel.org>,
"Aleksa Sarai" <cyphar@cyphar.com>
Subject: Re: [RFC PATCH] fs: introduce mkdirat2 syscall for atomic mkdir
Date: Sat, 27 Feb 2021 21:26:21 -0500 [thread overview]
Message-ID: <C9KT3SWXRPPA.257SY2N4MVBZD@taiga> (raw)
In-Reply-To: <20210228022440.GN2723601@casper.infradead.org>
On Sat Feb 27, 2021 at 9:24 PM EST, Matthew Wilcox wrote:
> Where's the problem? If mkdir succeeds in a sticky directory, others
> can't remove or rename it. So how can an app be tricked into doing
> something wrong?
It's not a security concern, it's just about about making the software
more robust.
1. Program A creates a directory
2. Program A is pre-empted
3. Program B deletes the directory
4. Program A creates a file in that directory
5. RIP
next prev parent reply other threads:[~2021-02-28 2:27 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-28 0:25 [RFC PATCH] fs: introduce mkdirat2 syscall for atomic mkdir Drew DeVault
2021-02-28 2:13 ` Al Viro
2021-02-28 2:21 ` Drew DeVault
2021-02-28 2:58 ` Al Viro
2021-02-28 13:56 ` Drew DeVault
2021-03-01 19:02 ` J. Bruce Fields
2021-03-08 13:50 ` Stefan Metzmacher
2021-02-28 2:24 ` Matthew Wilcox
2021-02-28 2:26 ` Drew DeVault [this message]
2021-02-28 4:03 ` Matthew Wilcox
2021-02-28 13:57 ` Drew DeVault
2021-03-01 19:09 ` J. Bruce Fields
2021-03-01 19:35 ` Matthew Wilcox
2021-03-01 20:10 ` J. Bruce Fields
2021-03-02 8:24 ` Miklos Szeredi
2021-03-02 7:13 ` Amir Goldstein
2021-03-03 2:39 ` Aleksa Sarai
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