[PATCH 5.4 218/240] irqchip/gic-v3: Fix error handling in gic_populate_ppi_partitions

Greg Kroah-Hartman
2022-06-20T14:06:37Z

From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit ec8401a429ffee34ccf38cebf3443f8d5ae6cb0d ]

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@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220601080930.31005-5-linmq006@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 f589ca2480a1..8ce4a2925e92 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1616,7 +1616,7 @@ 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);

--
2.35.1