linux-kernel - [PATCH] irqchip/tango: Fix possible null ptr reference in tangox_irq

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Date:   Thu, 3 Sep 2020 09:59:52 +0800
From:   Ye Bin <yebin10@...wei.com>
To:     <tglx@...utronix.de>, <jason@...edaemon.net>, <maz@...nel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Ye Bin <yebin10@...wei.com>
Subject: [PATCH] irqchip/tango: Fix possible null ptr reference in tangox_irq_init

In tangox_irq_init allocate chip but not test.

Signed-off-by: Ye Bin <yebin10@...wei.com>
---
 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 34290f09b853..25da120230ad 100644
--- a/drivers/irqchip/irq-tango.c
+++ b/drivers/irqchip/irq-tango.c
@@ -187,6 +187,8 @@ 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)
+		panic("%pOFn: failed to get chip", node);
 	chip->ctl = res.start - baseres->start;
 	chip->base = base;
 
-- 
2.25.4