Tainted lsmod output

Tainted lsmod output

[Márcio Oliveira]

Hi there,

   Anybody knows why lsmod command shows the fields "Tainted" and "Not 
Tainted" and what means the "P", "PF" and other letter showed in front 
of this field?

Thanks a lot.

Márcio

Re: Tainted lsmod output

[Randy.Dunlap]

On Mon, 12 Sep 2005, Márcio Oliveira wrote:

> Hi there,
>
>    Anybody knows why lsmod command shows the fields "Tainted" and "Not
> Tainted" and what means the "P", "PF" and other letter showed in front
> of this field?
>
> Thanks a lot.

There's a patch for these in current -mm.
For now, you can read kernel/panic.c comments:

 *  'P' - Proprietary module has been loaded.
 *  'F' - Module has been forcibly loaded.
 *  'S' - SMP with CPUs not designed for SMP.
 *  'R' - User forced a module unload.
 *  'M' - Machine had a machine check experience.
 *  'B' - System has hit bad_page.

-- 
~Randy

Re: Tainted lsmod output

[Hugh Dickins]

On Mon, 12 Sep 2005, Randy.Dunlap wrote:
> 
>  *  'P' - Proprietary module has been loaded.
>  *  'F' - Module has been forcibly loaded.
>  *  'S' - SMP with CPUs not designed for SMP.
>  *  'R' - User forced a module unload.
>  *  'M' - Machine had a machine check experience.
>  *  'B' - System has hit bad_page.

The one that puzzles me greatly isn't listed there: 'G'

Hugh

Re: Tainted lsmod output

[Randy.Dunlap]

On Mon, 12 Sep 2005, Hugh Dickins wrote:

> On Mon, 12 Sep 2005, Randy.Dunlap wrote:
> >
> >  *  'P' - Proprietary module has been loaded.
> >  *  'F' - Module has been forcibly loaded.
> >  *  'S' - SMP with CPUs not designed for SMP.
> >  *  'R' - User forced a module unload.
> >  *  'M' - Machine had a machine check experience.
> >  *  'B' - System has hit bad_page.
>
> The one that puzzles me greatly isn't listed there: 'G'

I guess it means GPL.

It's just the opposite of 'P', whereas all of the others
have opposites of ' '.

		snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c",
			tainted & TAINT_PROPRIETARY_MODULE ? 'P' : 'G',
			tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
			tainted & TAINT_UNSAFE_SMP ? 'S' : ' ',
			tainted & TAINT_FORCED_RMMOD ? 'R' : ' ',
 			tainted & TAINT_MACHINE_CHECK ? 'M' : ' ',
			tainted & TAINT_BAD_PAGE ? 'B' : ' ');

-- 
~Randy

Re: Tainted lsmod output

[Hugh Dickins]

On Mon, 12 Sep 2005, Randy.Dunlap wrote:
> On Mon, 12 Sep 2005, Hugh Dickins wrote:
> >
> > The one that puzzles me greatly isn't listed there: 'G'
> 
> I guess it means GPL.
> 
> It's just the opposite of 'P', whereas all of the others
> have opposites of ' '.

I guess the same, but doesn't it seem a strange kind of taint?

Hugh

Re: Tainted lsmod output

[Randy.Dunlap]

On Mon, 12 Sep 2005, Hugh Dickins wrote:

> On Mon, 12 Sep 2005, Randy.Dunlap wrote:
> > On Mon, 12 Sep 2005, Hugh Dickins wrote:
> > >
> > > The one that puzzles me greatly isn't listed there: 'G'
> >
> > I guess it means GPL.
> >
> > It's just the opposite of 'P', whereas all of the others
> > have opposites of ' '.
>
> I guess the same, but doesn't it seem a strange kind of taint?

<tainted> has already been found to be non-0.
Looks like someone decided to reinforce the GPL-ness of
all modules at that point and that some other tainted flag(s)
should be set.

-- 
~Randy

Re: Tainted lsmod output

[Valdis.Kletnieks]

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On Mon, 12 Sep 2005 20:58:01 BST, Hugh Dickins said:
> On Mon, 12 Sep 2005, Randy.Dunlap wrote:
> > On Mon, 12 Sep 2005, Hugh Dickins wrote:
> > >
> > > The one that puzzles me greatly isn't listed there: 'G'
> > 
> > I guess it means GPL.
> > 
> > It's just the opposite of 'P', whereas all of the others
> > have opposites of ' '.
> 
> I guess the same, but doesn't it seem a strange kind of taint?

Somebody had an automated log-parsing tool, and wanted to make sure there
were guaranteed at least 2 non-whitespace tokens on the line so they wouldn't
have to deal with parsing 'Tainted:       \n'?


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Re: Tainted lsmod output

[Horst von Brand]

Valdis.Kletnieks@vt.edu wrote:
> On Mon, 12 Sep 2005 20:58:01 BST, Hugh Dickins said:
> > On Mon, 12 Sep 2005, Randy.Dunlap wrote:
> > > On Mon, 12 Sep 2005, Hugh Dickins wrote:
> > > > The one that puzzles me greatly isn't listed there: 'G'

> > > I guess it means GPL.
> > > 
> > > It's just the opposite of 'P', whereas all of the others
> > > have opposites of ' '.

> > I guess the same, but doesn't it seem a strange kind of taint?

> Somebody had an automated log-parsing tool, and wanted to make sure there
> were guaranteed at least 2 non-whitespace tokens on the line so they wouldn't
> have to deal with parsing 'Tainted:       \n'?

That's a lame excuse for messing up the kernel and mistifying the heck out
of users. Either "Tainted: <some gunk>" or "Not tainted" (or just nothing)?
-- 
Dr. Horst H. von Brand                   User #22616 counter.li.org
Departamento de Informatica                     Fono: +56 32 654431
Universidad Tecnica Federico Santa Maria              +56 32 654239
Casilla 110-V, Valparaiso, Chile                Fax:  +56 32 797513

Re: Tainted lsmod output

[J. Bruce Fields]

On Mon, Sep 12, 2005 at 05:27:03PM -0400, Horst von Brand wrote:
> Valdis.Kletnieks@vt.edu wrote:
> > Somebody had an automated log-parsing tool, and wanted to make sure there
> > were guaranteed at least 2 non-whitespace tokens on the line so they wouldn't
> > have to deal with parsing 'Tainted:       \n'?
> 
> That's a lame excuse for messing up the kernel and mistifying the heck out
> of users. Either "Tainted: <some gunk>" or "Not tainted" (or just nothing)?

That's precisely what is does.  It's just that when there's taint other
than proprietary-module taint, it puts a "G" in that column instead of a
blank.  Which is oddly inconsistent, but whatever.

--b.

const char *print_tainted(void)
{
	static char buf[20];
	if (tainted) {
		snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c",
			tainted & TAINT_PROPRIETARY_MODULE ? 'P' : 'G',
			tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
			tainted & TAINT_UNSAFE_SMP ? 'S' : ' ',
			tainted & TAINT_FORCED_RMMOD ? 'R' : ' ',
 			tainted & TAINT_MACHINE_CHECK ? 'M' : ' ',
			tainted & TAINT_BAD_PAGE ? 'B' : ' ');
	}
	else
		snprintf(buf, sizeof(buf), "Not tainted");
	return(buf);
}

Re: Tainted lsmod output

[Dave Jones]

On Mon, Sep 12, 2005 at 04:16:45PM -0400, Valdis.Kletnieks@vt.edu wrote:

 > Somebody had an automated log-parsing tool, and wanted to make sure there
 > were guaranteed at least 2 non-whitespace tokens on the line so they wouldn't
 > have to deal with parsing 'Tainted:       \n'?

That situation is impossible to hit. It'd be not tainted in that case.
The 'G' only gets shown if at least 1 other taint flag (typically 'M'
in my experience) is also set.

		Dave