linux-kernel - [PATCH] libnvdimm/of_pmem: check the return value of kstrdup()

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Message-ID: <tencent_C1508086CF28C5FD4B834C3393E53271E80A@qq.com>
Date:   Mon, 13 Dec 2021 11:13:05 +0800
From:   Xiaoke Wang <xkernel.wang@...mail.com>
To:     oohall@...il.com
Cc:     nvdimm@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Xiaoke Wang <xkernel.wang@...mail.com>
Subject: [PATCH] libnvdimm/of_pmem: check the return value of kstrdup()

kstrdup() returns NULL when some internal memory erros happen, it is
better to check the return value of it so to catch the memory error in
time.

Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
---
 drivers/nvdimm/of_pmem.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c
index 10dbdcd..33978d2 100644
--- a/drivers/nvdimm/of_pmem.c
+++ b/drivers/nvdimm/of_pmem.c
@@ -31,6 +31,10 @@ 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;
 
--