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Date: Fri, 12 Oct 2007 14:48:08 +0200
From: =?iso-8859-1?Q?Bj=F6rn?= Steinbrink <B.Steinbrink@gmx.de>
To: "Robert P. J. Day" <rpjday@mindspring.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: what is the rationale for "TAINT_USER"?
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On 2007.10.12 08:37:04 -0400, Robert P. J. Day wrote:
> On Fri, 12 Oct 2007, Björn Steinbrink wrote:
> 
> > On 2007.10.12 08:04:20 -0400, Robert P. J. Day wrote:
> > >
> > >   i can see what the theoretical purpose for it is here:
> > >
> > > http://kerneltrap.org/node/6656
> > >
> > > but it's not clear how it can possibly be set from userland given
> > > that:
> > >
> > > $ grep -r TAINT_USER *
> > > include/linux/kernel.h:#define TAINT_USER                       (1<<6)
> > > kernel/panic.c:                 tainted & TAINT_USER ? 'U' : ' ',
> > > $
> > >
> > >   am i missing something screamingly obvious?
> >
> > Grepping for "tainted" leads me to:
> >
> > echo 32 > /proc/sys/kernel/tainted
> 
> ???.  i have no idea what you were grepping through to find that
> phrase, but TAINT_USER would seem to be equivalent to echo 64, not
> echo 32, anyway, no?

Oops, yeah, 64... And it didn't lead me to the exact phrase, but the
sysctl handler, which (implicitly) led me to that command. Sorry for
the confusion.

Björn