Date: Mon, 20 Feb 2006 23:50:39 -0600
From: Nathan Lynch <ntl@pobox.com>
To: Greg KH <greg@kroah.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: sysfs-related oops during module unload (2.6.16-rc2)
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Greg KH wrote:
> On Sat, Feb 18, 2006 at 06:47:51PM -0600, Nathan Lynch wrote:
> > Sorry for the delay.
> > 
> > Tested against 2.6.16-rc4-ish, and it seems to do the right thing --
> > modprobe -r says the module is busy while the refcnt attribute is
> > open.  The module is allowed to unload once the file is closed.
> 
> Great, thanks for trying it out and letting me know.

Sure -- do you plan to push this for 2.6.16?

The reason I ask is that the refcnt attribute is world-readable, so a
malicious or silly user can keep the file open until an unwitting
superuser unloads a module...

Far-fetched, I suppose, but I just wanted to make this scenario clear.


Nathan
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