linux-kernel - [PATCH 1/2] irqchip/loongson-eiointc: Check hwirq overflow

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Date:   Wed,  3 Aug 2022 12:27:27 +0800
From:   Huacai Chen <chenhuacai@...ngson.cn>
To:     Thomas Gleixner <tglx@...utronix.de>, Marc Zyngier <maz@...nel.org>
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Huacai Chen <chenhuacai@...il.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Huacai Chen <chenhuacai@...ngson.cn>
Subject: [PATCH 1/2] irqchip/loongson-eiointc: Check hwirq overflow

Check hwirq overflow when allocate irq in eiointc domain.

Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
---
 drivers/irqchip/irq-loongson-eiointc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-loongson-eiointc.c b/drivers/irqchip/irq-loongson-eiointc.c
index 80d8ca6f2d46..f8060e58ee06 100644
--- a/drivers/irqchip/irq-loongson-eiointc.c
+++ b/drivers/irqchip/irq-loongson-eiointc.c
@@ -241,8 +241,11 @@ static int eiointc_domain_alloc(struct irq_domain *domain, unsigned int virq,
 	struct eiointc *priv = domain->host_data;
 
 	ret = irq_domain_translate_onecell(domain, arg, &hwirq, &type);
-	if (ret)
-		return ret;
+	if (ret < 0)
+		return -EINVAL;
+
+	if (hwirq >= IOCSR_EXTIOI_VECTOR_NUM)
+		return -EINVAL;
 
 	for (i = 0; i < nr_irqs; i++) {
 		irq_domain_set_info(domain, virq + i, hwirq + i, &eiointc_irq_chip,
-- 
2.31.1