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Re: kern/29360: vfs.generic.usermount and mount(8) general questions
The following reply was made to PR kern/29360; it has been noted by GNATS.
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: Elad Efrat <elad%NetBSD.org@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, tech-kern%NetBSD.org@localhost,
Antti Kantee <pooka%NetBSD.org@localhost>
Subject: Re: kern/29360: vfs.generic.usermount and mount(8) general questions
Date: Sun, 6 Sep 2009 20:11:59 +0200
On Sun, Sep 06, 2009 at 01:02:02PM -0400, Elad Efrat wrote:
> On Sun, Sep 6, 2009 at 5:20 AM, Manuel
> Bouyer<bouyer%antioche.eu.org@localhost> wrote:
> >> Does anyone see any drawbacks to this approach? If not, I'll change
> >> the relevant code.
> > Yes, that would mean a user could mount his own FS over e.g. /tmp, or
> > /var/mail. that's bad.
> Forgot about those world-writable-but-sticky directories. Righto. :)
> > I think that checking the user owns the mount point is the right thing to
> > do.
> > I think a sysctl to control whenever to check for group ownerchip instead
> > of user ownerchip would work, though. It's up to the admin to carefully
> > choose a group for devices and mount points :)
> I agree with Antti here about the sysctl, but I want to replace the
> root check, eventually. What do you guys think about replacing the
> owner/root check with a kauth action that does the same in a
> bsd44-suser listener?
Fine with me
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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