linux-kernel - [PATCH 5.18 0148/1095] irqchip/mips-gic: Check the return value of ioremap() in gic_of

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Date:   Mon, 15 Aug 2022 19:52:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hacash Robot <hacashRobot@...tino.com>,
        William Dean <williamsukatube@....com>,
        Marc Zyngier <maz@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0148/1095] irqchip/mips-gic: Check the return value of ioremap() in gic_of_init()

From: William Dean <williamsukatube@....com>

[ Upstream commit 71349cc85e5930dce78ed87084dee098eba24b59 ]

The function ioremap() in gic_of_init() can fail, so
its return value should be checked.

Reported-by: Hacash Robot <hacashRobot@...tino.com>
Signed-off-by: William Dean <williamsukatube@....com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20220723100128.2964304-1-williamsukatube@163.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/irqchip/irq-mips-gic.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 8a9efb6ae587..1ba0f1555c80 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -783,6 +783,10 @@ static int __init gic_of_init(struct device_node *node,
 	}
 
 	mips_gic_base = ioremap(gic_base, gic_len);
+	if (!mips_gic_base) {
+		pr_err("Failed to ioremap gic_base\n");
+		return -ENOMEM;
+	}
 
 	gicconfig = read_gic_config();
 	gic_shared_intrs = FIELD_GET(GIC_CONFIG_NUMINTERRUPTS, gicconfig);
-- 
2.35.1