linux-kernel - Re: [patch 7/8] allow unprivileged mounts

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Message-Id: <E1HfAsR-0002Nw-00@dorka.pomaz.szeredi.hu>
Date:	Sat, 21 Apr 2007 10:23:27 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	akpm@...ux-foundation.org
CC:	ericvh@...il.com, serue@...ibm.com, viro@....linux.org.uk,
	linuxram@...ibm.com, ebiederm@...ssion.com,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	containers@...ts.osdl.org
Subject: Re: [patch 7/8] allow unprivileged mounts

> > 
> > > Define a new fs flag FS_SAFE, which denotes, that unprivileged
> > > mounting of this filesystem may not constitute a security problem.
> > > 
> > > Since most filesystems haven't been designed with unprivileged
> > > mounting in mind, a thorough audit is needed before setting this flag.
> > 
> > Practically speaking, is there any realistic likelihood that any filesystem
> > apart from FUSE will ever use this?
> 
> V9FS people did express an interest in this.  Yeah, I should've CC-ed
> them, but forgot.  Sorry.

And CIFS maybe.  They also have an unprivileged mounting suid hack.
But I'm not very optimistic about CIFS, seeing some of the code,
that's in there.

Miklos
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