# Re: \[RFC PATCH\] fs: introduce mkdirat2 syscall for atomic mkdir

- From: Drew DeVault \<hidden\>
- Date: 2021-02-28 02:27:21 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2021/02/200747
- Thread: https://ratatoskr.run/linux-fsdevel/2021/02/200743/t.md

```text
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
```