irq: check domain hwirq range for DT translate

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@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 200ce832c585..8bd7479b8390 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 (d->nr_irq && ((intspec[0] < d->hwirq_base) ||
+            (intspec[0] >= d->hwirq_base + d->nr_irq)))
+                return -EINVAL;
 
         *out_hwirq = intspec[0];
         *out_type = IRQ_TYPE_NONE;