linux-kernel - Re: [PATCH V2]irq/core: Add a length limitation

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Date:	Wed, 25 Nov 2009 15:08:02 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Liuweni <qingshenlwy@...il.com>
cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, xgr178 <xgr178@....com>,
	strongzgy <strongzgy@...il.com>,
	qingshenlwy <qingshenlwy@....com>, rusty <rusty@...tcorp.com.au>,
	travis <travis@....com>, adobriyan <adobriyan@...il.com>
Subject: Re: [PATCH V2]irq/core: Add a length limitation

On Wed, 25 Nov 2009, Liuweni wrote:

>  ---
> In this version, I modify the code by Ingo's suggestion, 
> and less code add. 
> The code will check the irqaction->name's length 
> and avoid Using too long name without any notice.
>
> --- a/kernel/irq/proc.c
> +++ b/kernel/irq/proc.c
> @@ -196,6 +196,8 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
>  	char name [MAX_NAMELEN];
>  	struct irq_desc *desc = irq_to_desc(irq);
>  
> +	WARN_ON(strlen(action->name) < MAX_NAMELEN);
> +

This is going to warn on every action->name which is actually used in
the kernel except for the ones which are too long.

Thanks,

	tglx


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