[PATCH -next] irqchip/tango: Fix potential NULL pointer dereference
From: YueHaibing
Date: Tue Jan 29 2019 - 03:01:36 EST
There is a potential NULL pointer dereference in case kzalloc()
fails and returns NULL.
Fixes: 4bba66899ac6 ("irqchip/tango: Add support for Sigma Designs SMP86xx/SMP87xx interrupt controller")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
drivers/irqchip/irq-tango.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/irqchip/irq-tango.c b/drivers/irqchip/irq-tango.c
index ae28d86..a63b828 100644
--- a/drivers/irqchip/irq-tango.c
+++ b/drivers/irqchip/irq-tango.c
@@ -191,6 +191,8 @@ static int __init tangox_irq_init(void __iomem *base, struct resource *baseres,
panic("%pOFn: failed to get address", node);
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
chip->ctl = res.start - baseres->start;
chip->base = base;
--
2.7.0