linux-kernel - [PATCH] PCI: of: Fix memory leak when of_changeset_create

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Date:   Thu, 14 Sep 2023 11:15:51 -0700
From:   Lizhi Hou <lizhi.hou@....com>
To:     <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <herve.codina@...tlin.com>
CC:     Lizhi Hou <lizhi.hou@....com>, <bhelgaas@...gle.com>,
        <robh@...nel.org>
Subject: [PATCH] PCI: of: Fix memory leak when of_changeset_create_node() failed

Destroy and free cset when failure happens.

Fixes: 407d1a51921e ("PCI: Create device tree node for bridge")
Reported-by: Herve Codina <herve.codina@...tlin.com>
Closes: https://lore.kernel.org/all/20230911171319.495bb837@bootlin.com/
Signed-off-by: Lizhi Hou <lizhi.hou@....com>
---
 drivers/pci/of.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 2af64bcb7da3..67bbfa2fca59 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -663,7 +663,6 @@ void of_pci_make_dev_node(struct pci_dev *pdev)
 	np = of_changeset_create_node(cset, ppnode, name);
 	if (!np)
 		goto failed;
-	np->data = cset;
 
 	ret = of_pci_add_properties(pdev, cset, np);
 	if (ret)
@@ -673,12 +672,17 @@ void of_pci_make_dev_node(struct pci_dev *pdev)
 	if (ret)
 		goto failed;
 
+	np->data = cset;
 	pdev->dev.of_node = np;
 	kfree(name);
 
 	return;
 
 failed:
+	if (cset) {
+		of_changeset_destroy(cset);
+		kfree(cset);
+	}
 	if (np)
 		of_node_put(np);
 	kfree(name);
-- 
2.34.1