linux-kernel - [PATCH] firmware: psci: Fix refcount leak in psci_dt

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Message-Id: <20250318151712.28763-1-linmq006@gmail.com>
Date: Tue, 18 Mar 2025 23:17:12 +0800
From: Miaoqian Lin <linmq006@...il.com>
To: Mark Rutland <mark.rutland@....com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Will Deacon <will@...nel.org>,
	Hanjun Guo <guohanjun@...wei.com>,
	Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: linmq006@...il.com
Subject: [PATCH] firmware: psci: Fix refcount leak in psci_dt_init

Fix a reference counter leak in psci_dt_init() where of_node_put(np) was
missing after of_find_matching_node_and_match() when np is unavailable.

Fixes: bff60792f994 ("arm64: psci: factor invocation code to drivers")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/firmware/psci/psci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index a1ebbe9b73b1..38ca190d4a22 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -804,8 +804,10 @@ int __init psci_dt_init(void)
 
 	np = of_find_matching_node_and_match(NULL, psci_of_match, &matched_np);
 
-	if (!np || !of_device_is_available(np))
+	if (!np || !of_device_is_available(np)) {
+		of_node_put(np);
 		return -ENODEV;
+	}
 
 	init_fn = (psci_initcall_t)matched_np->data;
 	ret = init_fn(np);
-- 
2.39.5 (Apple Git-154)