linux-kernel - [irqchip: irq/irqchip-fixes] irqchip/apple-aic: Fix refcount leak in build_fiq

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Message-ID: <165479342813.4207.13989343963234082027.tip-bot2@tip-bot2>
Date:   Thu, 09 Jun 2022 16:50:28 -0000
From:   "irqchip-bot for Miaoqian Lin" <tip-bot2@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Miaoqian Lin <linmq006@...il.com>, Marc Zyngier <maz@...nel.org>,
        tglx@...utronix.de
Subject: [irqchip: irq/irqchip-fixes] irqchip/apple-aic: Fix refcount leak in
 build_fiq_affinity

The following commit has been merged into the irq/irqchip-fixes branch of irqchip:

Commit-ID:     b1ac803f47cb1615468f35cf1ccb553c52087301
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/b1ac803f47cb1615468f35cf1ccb553c52087301
Author:        Miaoqian Lin <linmq006@...il.com>
AuthorDate:    Wed, 01 Jun 2022 12:09:26 +04:00
Committer:     Marc Zyngier <maz@...nel.org>
CommitterDate: Thu, 09 Jun 2022 17:36:57 +01:00

irqchip/apple-aic: Fix refcount leak in build_fiq_affinity

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
---
 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 12dd487..478d0af 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;