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From: Miklos Szeredi <miklos@szeredi.hu>
To: jengelh@linux01.gwdg.de
Cc: ebiederm@xmission.com, miklos@szeredi.hu,
	akpm@linux-foundation.org, serue@us.ibm.com,
	viro@ftp.linux.org.uk, linuxram@us.ibm.com,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	containers@lists.osdl.org, hpa@zytor.com
Subject: Re: [patch] unprivileged mounts update
Date: Thu, 26 Apr 2007 22:27:32 +0200	[thread overview]
Message-ID: <E1HhAYu-000361-00@dorka.pomaz.szeredi.hu> (raw)
In-Reply-To: <Pine.LNX.4.61.0704262107130.506@yvahk01.tjqt.qr> (message from Jan Engelhardt on Thu, 26 Apr 2007 21:10:04 +0200 (MEST))

> On Apr 25 2007 11:21, Eric W. Biederman wrote:
> >>
> >> Why did we want to use fsuid, exactly?
> >
> >- Because ruid is completely the wrong thing we want mounts owned
> >  by whomever's permissions we are using to perform the mount.
> 
> Think nfs. I access some nfs file as an unprivileged user. knfsd, by
> nature, would run as euid=0, uid=0, but it needs fsuid=jengelh for
> most permission logic to work as expected.

I don't think knfsd will ever want to call mount(2).

But yeah, I've been convinced, that using fsuid is the right thing to
do.

Miklos

  reply	other threads:[~2007-04-26 20:30 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-25  7:45 Miklos Szeredi
2007-04-25 15:18 ` Miklos Szeredi
2007-04-25 16:55   ` H. Peter Anvin
2007-04-25 17:20     ` Serge E. Hallyn
2007-04-25 17:46       ` Eric W. Biederman
2007-04-25 17:56         ` Serge E. Hallyn
2007-04-25 18:41           ` Eric W. Biederman
2007-04-25 18:52             ` Serge E. Hallyn
2007-04-25 19:33               ` Miklos Szeredi
2007-04-26 14:57                 ` Serge E. Hallyn
2007-04-26 15:23                   ` Miklos Szeredi
2007-04-26 16:19                     ` Serge E. Hallyn
2007-04-26 16:29                       ` Miklos Szeredi
2007-04-26 19:42                         ` Serge E. Hallyn
2007-04-26 19:56                           ` Miklos Szeredi
2007-04-27  2:10                             ` Serge E. Hallyn
2007-04-25 17:21   ` Eric W. Biederman
2007-04-25 17:30     ` Serge E. Hallyn
2007-04-26 19:10     ` Jan Engelhardt
2007-04-26 20:27       ` Miklos Szeredi [this message]
2007-04-27  4:10         ` Eric W. Biederman
2007-04-27  7:01         ` Jan Engelhardt
2007-04-25 19:33   ` Andrew Morton
2007-04-25 19:45     ` Miklos Szeredi

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