linux-kernel - Re: [PATCH Resend] - SN: validate smp

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Message-Id: <20070508121945.3e8d29c1.akpm@linux-foundation.org>
Date:	Tue, 8 May 2007 12:19:45 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	"John Keller" <jpk@....com>, <linux-kernel@...r.kernel.org>,
	<steiner@....com>, <linux-ia64@...r.kernel.org>
Subject: Re: [PATCH Resend] - SN: validate smp_affinity mask on intr
 redirect

On Tue, 8 May 2007 11:03:20 -0700
"Luck, Tony" <tony.luck@...el.com> wrote:

> +#ifndef is_affinity_mask_valid
> +#define is_affinity_mask_valid() 1
> +#endif
> +
>  int no_irq_affinity;
>  static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
>  				   unsigned long count, void *data)
> @@ -42,6 +46,9 @@ static int irq_affinity_write_proc(struc
>  	if (err)
>  		return err;
>  
> +	if (!is_affinity_mask_valid(new_value))
> +		return -EINVAL;
> 
> This results in a warning:
> kernel/irq/proc.c:49: warning: implicit declaration of function `is_affinity_mask_valid'
> 

It had a dopey little bug:


diff -puN kernel/irq/proc.c~sn-validate-smp_affinity-mask-on-intr-redirect-fix kernel/irq/proc.c
--- a/kernel/irq/proc.c~sn-validate-smp_affinity-mask-on-intr-redirect-fix
+++ a/kernel/irq/proc.c
@@ -28,7 +28,7 @@ static int irq_affinity_read_proc(char *
 }
 
 #ifndef is_affinity_mask_valid
-#define is_affinity_mask_valid() 1
+#define is_affinity_mask_valid(val) 1
 #endif
 
 int no_irq_affinity;
_

-
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