linux-kernel - [PATCH v2] nvdimm: of_pmem: Check return value and add kfree for kstrdup

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Date:   Tue, 29 Aug 2023 03:16:37 +0000
From:   Chen Ni <nichen@...as.ac.cn>
To:     dan.j.williams@...el.com, vishal.l.verma@...el.com,
        dave.jiang@...el.com, ira.weiny@...el.com, oohall@...il.com
Cc:     aneesh.kumar@...ux.ibm.com, nvdimm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Chen Ni <nichen@...as.ac.cn>
Subject: [PATCH v2] nvdimm: of_pmem: Check return value and add kfree for kstrdup

Check the return value of kstrdup() and add kfree() for kstrdup() to 
avoid memory leak.

Fixes: 49bddc73d15c ("libnvdimm/of_pmem: Provide a unique name for bus provider")
Signed-off-by: Chen Ni <nichen@...as.ac.cn>
---
Changelog:

v1 -> v2:

1.Add a fixes tag.
2.Update commit message.
---
 drivers/nvdimm/of_pmem.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c
index 10dbdcdfb9ce..fe6edb7e6631 100644
--- a/drivers/nvdimm/of_pmem.c
+++ b/drivers/nvdimm/of_pmem.c
@@ -31,11 +31,17 @@ static int of_pmem_region_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	priv->bus_desc.provider_name = kstrdup(pdev->name, GFP_KERNEL);
+	if (!priv->bus_desc.provider_name) {
+		kfree(priv);
+		return -ENOMEM;
+	}
+
 	priv->bus_desc.module = THIS_MODULE;
 	priv->bus_desc.of_node = np;
 
 	priv->bus = bus = nvdimm_bus_register(&pdev->dev, &priv->bus_desc);
 	if (!bus) {
+		kfree(priv->bus_desc.provider_name);
 		kfree(priv);
 		return -ENODEV;
 	}
-- 
2.25.1