[PATCH V2]irq/core: Add a length limitation

[Liuweni]

 ---
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.
---
Signed-off-by: Liuwenyi<qingshenlwy@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Mike Travis <travis@xxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx

---
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 0832145..b91dcb1 100644
--- 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);
+
 	if (!desc->dir || action->dir || !action->name ||
 					!name_unique(irq, action))
 		return;

 				
--------------
Best Regards,
Liuweni
2009-11-25

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