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Date: Sun, 14 Oct 2001 19:22:58 +0300
From: Ville Herva <vherva@mail.niksula.cs.hut.fi>
To: Alexander Viro <viro@math.psu.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: mount --bind and -o [re: nosuid/noexec/nodev handling]
Message-ID: <20011014192258.R1074@niksula.cs.hut.fi>
In-Reply-To: <20011014185908.P1074@niksula.cs.hut.fi> <Pine.GSO.4.21.0110141201540.6026-100000@weyl.math.psu.edu>
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In-Reply-To: <Pine.GSO.4.21.0110141201540.6026-100000@weyl.math.psu.edu>; from viro@math.psu.edu on Sun, Oct 14, 2001 at 12:06:02PM -0400
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On Sun, Oct 14, 2001 at 12:06:02PM -0400, you [Alexander Viro] claimed:
> 
> 
> On Sun, 14 Oct 2001, Ville Herva wrote:
> 
> > Ummh, is there a reason for this behaviour?
> > 
> > $ mount --bind -o noexec /bin /home/sftp/bin
> 
> Broken - mount --bind ignores flags.  Create a binding, then remount it.
> IOW, two mount(2) calls are needed.

FYI, this causes the last mount process to hang in D state (kill -KILL does
not affect it):

$ mount --bind -o nosuid,noexec,ro /bin /tmp/test
$?mount --bind -o nosuid,noexec,ro /bin /tmp/test
$ mount --bind -o remount,nosuid,noexec,ro /tmp/test

This is 2.4.10-ac10.

 
-- v --

v@iki.fi
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