linux-kernel - Re: [RFC PATCH] vfs: syscalls: Add create_automount() and remove

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAHk-=whfoWHvL29PPXncxV6iprC4e_m6CQWQJ1G4-JtR+uGVUA@mail.gmail.com>
Date:   Wed, 19 Feb 2020 11:07:28 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Al Viro <viro@...iv.linux.org.uk>, coda@...cmu.edu,
        linux-afs@...ts.infradead.org, CIFS <linux-cifs@...r.kernel.org>,
        "open list:NFS, SUNRPC, AND..." <linux-nfs@...r.kernel.org>,
        linux-btrfs <linux-btrfs@...r.kernel.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] vfs: syscalls: Add create_automount() and remove_automount()

On Wed, Feb 19, 2020 at 10:55 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Why don't you just use mkdir with S_ISVTX set, or something like that?

Actually, since this is apparently a different filetype, the _logical_
thing to do is to use "mknod()".

Yes, yes, it will require a new case (and maybe a per-filesystem
callback or a flag or something) in "may_mknod()" and "do_mknodat()"
to let those new kinds through, but it sounds like mknod() is actually
what you're doing.

You presumably need a new type _anyway_ for stat() and/or the filldir
d_type field. Or do you always want to make it look exactly like a
directory to all user space?

                  Linus