linux-kernel - [irqchip: irq/irqchip-fixes] irqchip/gic-v3: Fix error handling in gic_populate_ppi

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Date:   Thu, 09 Jun 2022 16:50:26 -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/gic-v3: Fix error handling in
 gic_populate_ppi_partitions

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

Commit-ID:     ec8401a429ffee34ccf38cebf3443f8d5ae6cb0d
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/ec8401a429ffee34ccf38cebf3443f8d5ae6cb0d
Author:        Miaoqian Lin <linmq006@...il.com>
AuthorDate:    Wed, 01 Jun 2022 12:09:28 +04:00
Committer:     Marc Zyngier <maz@...nel.org>
CommitterDate: Thu, 09 Jun 2022 17:36:57 +01:00

irqchip/gic-v3: Fix error handling in gic_populate_ppi_partitions

of_get_child_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
When kcalloc fails, it missing of_node_put() and results in refcount
leak. Fix this by goto out_put_node label.

Fixes: 52085d3f2028 ("irqchip/gic-v3: Dynamically allocate PPI partition descriptors")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-5-linmq006@gmail.com
---
 drivers/irqchip/irq-gic-v3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 2be8dea..1d5b475 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1932,7 +1932,7 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
 
 	gic_data.ppi_descs = kcalloc(gic_data.ppi_nr, sizeof(*gic_data.ppi_descs), GFP_KERNEL);
 	if (!gic_data.ppi_descs)
-		return;
+		goto out_put_node;
 
 	nr_parts = of_get_child_count(parts_node);