linux-kernel - Re: Taint kernel after WARN

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Message-ID: <20080515040635.GA2164@linux-sh.org>
Date:	Thu, 15 May 2008 13:06:35 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Haavard Skinnemoen <hskinnemoen@...el.com>
Cc:	Nur Hussein <nurhussein@...il.com>, linux-kernel@...r.kernel.org,
	randy.dunlap@...cle.com, arjan@...radead.org,
	akpm@...ux-foundation.org, mingo@...e.hu, a.p.zijlstra@...llo.nl,
	kyle@...isc-linux.org, schwidefsky@...ibm.com
Subject: Re: Taint kernel after WARN_ON(condition) v2

On Wed, Feb 13, 2008 at 03:55:20PM +0100, Haavard Skinnemoen wrote:
> On Wed, 13 Feb 2008 22:27:40 +0800
> Nur Hussein <nurhussein@...il.com> wrote:
> 
> > This does not work on architectures where WARN_ON has its own definition. 
> > These archs are:
> > 	1. s390
> > 	2. superh
> > 	3. avr32
> > 	4. parisc
> 
> Hmm. Relying on the generic code in lib/bug.c qualifies as "own
> definition" these days? I think the patch below should take care of all
> four...unless I've misunderstood something.
> 
> Signed-off-by: Haavard Skinnemoen <hskinnemoen@...el.com>
> 
> diff --git a/lib/bug.c b/lib/bug.c
> index 530f38f..0d67419 100644
> --- a/lib/bug.c
> +++ b/lib/bug.c
> @@ -35,6 +35,7 @@
>  
>      Jeremy Fitzhardinge <jeremy@...p.org> 2006
>   */
> +#include <linux/kernel.h>
>  #include <linux/list.h>
>  #include <linux/module.h>
>  #include <linux/bug.h>
> @@ -149,6 +150,7 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
>  			       (void *)bugaddr);
>  
>  		show_regs(regs);
> +		add_taint(TAINT_WARN);
>  		return BUG_TRAP_TYPE_WARN;
>  	}
>  

I was just about to submit the exact same patch, so it looks like this
slipped through the cracks. Andrew, please apply.

Acked-by: Paul Mundt <lethal@...ux-sh.org>
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