From: Wenwen Wang <wenwen@cs.uga.edu>
To: Wenwen Wang <wenwen@cs.uga.edu>
Cc: Marek Vasut <marek.vasut@gmail.com>,
Tudor Ambarus <tudor.ambarus@microchip.com>,
David Woodhouse <dwmw2@infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
linux-mtd@lists.infradead.org (open list:SPI NOR SUBSYSTEM),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] mtd: spi-nor: fix a memory leak bug
Date: Sun, 18 Aug 2019 12:39:53 -0500 [thread overview]
Message-ID: <1566149993-2748-1-git-send-email-wenwen@cs.uga.edu> (raw)
In spi_nor_parse_4bait(), 'dwords' is allocated through kmalloc(). However,
it is not deallocated in the following execution if spi_nor_read_sfdp()
fails, leading to a memory leak. To fix this issue, free 'dwords' before
returning the error.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
---
drivers/mtd/spi-nor/spi-nor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 03cc788..a41a466 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -3453,7 +3453,7 @@ static int spi_nor_parse_4bait(struct spi_nor *nor,
addr = SFDP_PARAM_HEADER_PTP(param_header);
ret = spi_nor_read_sfdp(nor, addr, len, dwords);
if (ret)
- return ret;
+ goto out;
/* Fix endianness of the 4BAIT DWORDs. */
for (i = 0; i < SFDP_4BAIT_DWORD_MAX; i++)
--
2.7.4
next reply other threads:[~2019-08-18 17:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-18 17:39 Wenwen Wang [this message]
2019-08-19 6:03 ` [PATCH] mtd: spi-nor: fix a memory leak bug Tudor.Ambarus
2019-08-19 17:03 ` Wenwen Wang
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