linux-kernel - [patch] off by one bug

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Date:	Sun, 3 Jan 2010 14:14:51 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [patch] off by one bug

if irq == PCF50633_NUM_IRQ that puts us past the end of the array.

Signed-off-by: Dan Carpenter <error27@...il.com>

--- orig/drivers/mfd/pcf50633-core.c	2010-01-03 14:10:10.000000000 +0200
+++ devel/drivers/mfd/pcf50633-core.c	2010-01-03 14:10:31.000000000 +0200
@@ -217,7 +217,7 @@ static struct attribute_group pcf_attr_g
 int pcf50633_register_irq(struct pcf50633 *pcf, int irq,
 			void (*handler) (int, void *), void *data)
 {
-	if (irq < 0 || irq > PCF50633_NUM_IRQ || !handler)
+	if (irq < 0 || irq >= PCF50633_NUM_IRQ || !handler)
 		return -EINVAL;
 
 	if (WARN_ON(pcf->irq_handler[irq].handler))
@@ -234,7 +234,7 @@ EXPORT_SYMBOL_GPL(pcf50633_register_irq)
 
 int pcf50633_free_irq(struct pcf50633 *pcf, int irq)
 {
-	if (irq < 0 || irq > PCF50633_NUM_IRQ)
+	if (irq < 0 || irq >= PCF50633_NUM_IRQ)
 		return -EINVAL;
 
 	mutex_lock(&pcf->lock);
--
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