linux-kernel - [PATCH 2/9] irq: check domain hwirq range for DT translate

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Date:	Wed, 14 Dec 2011 09:28:51 -0600
From:	Rob Herring <robherring2@...il.com>
To:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org
Cc:	Grant Likely <grant.likely@...retlab.ca>, shawn.guo@...escale.com,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kevin Hilman <khilman@...com>,
	Tony Lindgren <tony@...mide.com>,
	Barry Song <baohua.song@....com>,
	Linus Walleij <linus.ml.walleij@...il.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 2/9] irq: check domain hwirq range for DT translate

From: Rob Herring <rob.herring@...xeda.com>

A DT node may have more than 1 domain associated with it, so make sure
the hwirq number is within range when doing DT translation.

Signed-off-by: Rob Herring <rob.herring@...xeda.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/irq/irqdomain.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 200ce83..ae6441e 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct irq_domain *d,
 		return -EINVAL;
 	if (intsize < 1)
 		return -EINVAL;
+	if ((intspec[0] < d->hwirq_base) ||
+	    (intspec[0] >= d->hwirq_base + d->nr_irq))
+		return -EINVAL;
 
 	*out_hwirq = intspec[0];
 	*out_type = IRQ_TYPE_NONE;
-- 
1.7.5.4

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