linux-kernel - Re: [PATCH RFC 0/1] mount: universally disallow mounting over symlinks

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]

Date:   Mon, 13 Jan 2020 03:54:07 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Ian Kent <raven@...maw.net>
Cc:     Aleksa Sarai <cyphar@...har.com>,
        David Howells <dhowells@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        stable@...r.kernel.org,
        Christian Brauner <christian.brauner@...ntu.com>,
        Serge Hallyn <serge@...lyn.com>, dev@...ncontainers.org,
        containers@...ts.linux-foundation.org, linux-api@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 0/1] mount: universally disallow mounting over
 symlinks

On Mon, Jan 13, 2020 at 09:48:23AM +0800, Ian Kent wrote:

> I did try this patch and I was trying to work out why it didn't
> work. But thought I'd let you know what I saw.
> 
> Applying it to current Linus tree systemd stops at switch root.
> 
> Not sure what causes that, I couldn't see any reason for it.

Wait a minute...  So you are seeing problems early in the boot,
before any autofs ioctls might come into play?

Sigh...  Guess I'll have to dig that Fedora KVM image out and
try to see what it's about... ;-/  Here comes a couple of hours
of build...