linux-kernel - [PATCH 5.18 092/141] irqchip/apple-aic: Fix refcount leak in build_fiq

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Message-Id: <20220620124732.264561958@linuxfoundation.org>
Date:   Mon, 20 Jun 2022 14:50:30 +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, Miaoqian Lin <linmq006@...il.com>,
        Marc Zyngier <maz@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 092/141] irqchip/apple-aic: Fix refcount leak in build_fiq_affinity

From: Miaoqian Lin <linmq006@...il.com>

[ Upstream commit b1ac803f47cb1615468f35cf1ccb553c52087301 ]

of_find_node_by_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: a5e8801202b3 ("irqchip/apple-aic: Parse FIQ affinities from device-tree")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-3-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/irqchip/irq-apple-aic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 12dd48727a15..478d0af16d9f 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -1035,6 +1035,7 @@ static void build_fiq_affinity(struct aic_irq_chip *ic, struct device_node *aff)
 			continue;
 
 		cpu = of_cpu_node_to_id(cpu_node);
+		of_node_put(cpu_node);
 		if (WARN_ON(cpu < 0))
 			continue;
 
-- 
2.35.1