[sf-lug] File Permissions - surprises

[Michael Paoli]

Surprises?  What surprises?  ;-)

Been there, done that.
https://www.mpaoli.net/~michael/linux/permissions.html

> From: "Rick Moen" <rick at linuxmafia.com>
> Subject: Re: [sf-lug] File Permissions - surprises
> Date: Tue, 7 Jun 2022 18:09:40 -0700

> Quoting Ken Shaffer (kenshaffer80 at gmail.com):
>
>> Then there's the stuff which changes with kernel params, like
>> fs.protected_regular see:
>> https://unix.stackexchange.com/questions/503111/group-permissions-for-root-not-working-in-tmp
>
> LWN article about that non-default security protection mechanism:
> https://lwn.net/Articles/748141/
> More about that and related kernel-hardening:
> https://blog.frehi.be/2019/01/30/linux-security-hardening-recommendations/
>
> As mentioned on the latter blog, reading Kees Cook's blog on the subject
> is also frequently enlightening.  https://outflux.net/blog/