linux-kernel - [PATCH 3/6] mtd: cs553x_nand: Fix kasprintf() usage

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Date:	Mon,  1 Jun 2015 23:10:51 +0200
From:	Richard Weinberger <richard@....at>
To:	computersforpeace@...il.com
Cc:	dwmw2@...radead.org, maximlevitsky@...il.com,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Richard Weinberger <richard@....at>
Subject: [PATCH 3/6] mtd: cs553x_nand: Fix kasprintf() usage

kasprintf() does a dynamic memory allocation and can fail.
We have to handle that case.

Signed-off-by: Richard Weinberger <richard@....at>
---
 drivers/mtd/nand/cs553x_nand.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/cs553x_nand.c b/drivers/mtd/nand/cs553x_nand.c
index 88109d3..aec6045 100644
--- a/drivers/mtd/nand/cs553x_nand.c
+++ b/drivers/mtd/nand/cs553x_nand.c
@@ -237,17 +237,23 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
 	/* Enable the following for a flash based bad block table */
 	this->bbt_options = NAND_BBT_USE_FLASH;
 
+	new_mtd->name = kasprintf(GFP_KERNEL, "cs553x_nand_cs%d", cs);
+	if (!new_mtd->name) {
+		err = -ENOMEM;
+		goto out_ior;
+	}
+
 	/* Scan to find existence of the device */
 	if (nand_scan(new_mtd, 1)) {
 		err = -ENXIO;
-		goto out_ior;
+		goto out_free;
 	}
 
-	new_mtd->name = kasprintf(GFP_KERNEL, "cs553x_nand_cs%d", cs);
-
 	cs553x_mtd[cs] = new_mtd;
 	goto out;
 
+out_free:
+	kfree(new_mtd->name);
 out_ior:
 	iounmap(this->IO_ADDR_R);
 out_mtd:
-- 
1.8.4.5

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