linux-kernel - [PATCH 1/2] virt: fsl: fix missing of_node_put() on early exit from for_each_compatible

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Message-Id: <20241028-fsl_hypervisor-of_node_put-v1-1-dd0621341fb7@gmail.com>
Date: Mon, 28 Oct 2024 18:05:41 +0100
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Arnd Bergmann <arnd@...db.de>, Timur Tabi <timur@...escale.com>, 
 Kumar Gala <galak@...nel.crashing.org>
Cc: linux-kernel@...r.kernel.org, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>, stable@...r.kernel.org
Subject: [PATCH 1/2] virt: fsl: fix missing of_node_put() on early exit
 from for_each_compatible_node()

Early exits from for_each_compatible_node() require explicit calls to
of_node_put() to release the node and avoid leaking the resource. Add
the missing call to of_node_put(np) before the 'goto' instruction that
jumps out of the loop.

Cc: stable@...r.kernel.org
Fixes: 6db7199407ca ("drivers/virt: introduce Freescale hypervisor management driver")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
 drivers/virt/fsl_hypervisor.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c
index e92e2ceb12a4..7c7ec13761ba 100644
--- a/drivers/virt/fsl_hypervisor.c
+++ b/drivers/virt/fsl_hypervisor.c
@@ -846,8 +846,10 @@ static int __init fsl_hypervisor_init(void)
 		}
 
 		dbisr = kzalloc(sizeof(*dbisr), GFP_KERNEL);
-		if (!dbisr)
+		if (!dbisr) {
+			of_node_put(np);
 			goto out_of_memory;
+		}
 
 		dbisr->irq = irq;
 		dbisr->doorbell = be32_to_cpup(handle);

-- 
2.43.0