linux-kernel - [PATCH 4.14 017/104] mtd: nand: qcom: Add a NULL check for devm

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Message-Id: <20180814171516.326734834@linuxfoundation.org>
Date:   Tue, 14 Aug 2018 19:16:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Fabio Estevam <fabio.estevam@....com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Amit Pundir <amit.pundir@...aro.org>
Subject: [PATCH 4.14 017/104] mtd: nand: qcom: Add a NULL check for devm_kasprintf()

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Fabio Estevam <fabio.estevam@....com>

commit 069f05346d01e7298939f16533953cdf52370be3 upstream.

devm_kasprintf() may fail, so we should better add a NULL check
and propagate an error on failure.

Signed-off-by: Fabio Estevam <fabio.estevam@....com>
Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Signed-off-by: Amit Pundir <amit.pundir@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mtd/nand/qcom_nandc.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/mtd/nand/qcom_nandc.c
+++ b/drivers/mtd/nand/qcom_nandc.c
@@ -2544,6 +2544,9 @@ static int qcom_nand_host_init(struct qc
 
 	nand_set_flash_node(chip, dn);
 	mtd->name = devm_kasprintf(dev, GFP_KERNEL, "qcom_nand.%d", host->cs);
+	if (!mtd->name)
+		return -ENOMEM;
+
 	mtd->owner = THIS_MODULE;
 	mtd->dev.parent = dev;