linux-kernel - Re: devpts multiple instances feedback

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Message-ID: <20090201164104.0daafdf7@lxorguk.ukuu.org.uk>
Date:	Sun, 1 Feb 2009 16:41:04 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Christoph Hellwig <hch@....de>
Cc:	Christoph Hellwig <hch@....de>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: devpts multiple instances feedback

On Sun, 1 Feb 2009 17:29:58 +0100
Christoph Hellwig <hch@....de> wrote:

> On Mon, Jan 26, 2009 at 09:58:53PM +0000, Alan Cox wrote:
> > > > That was also one of the reasons for the default 000 mode on the pts/ptmx
> > > > device node
> > > 
> > > So just make it 000 but always created it.
> > 
> > That still allows it to be subverted with some security rulesets -
> > remember root can open a 000 file by default.
> 
> root can also mknod device nodes by default.

That depends on your SELinux policy rules
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