From: Wenwen Wang <wenwen@cs.uga.edu>
To: Wenwen Wang <wenwen@cs.uga.edu>
Cc: David Woodhouse <dwmw2@infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
Marek Vasut <marek.vasut@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:MEMORY TECHNOLOGY
DEVICES (MTD)), linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] mtd: sm_ftl: fix memory leaks
Date: Sun, 18 Aug 2019 11:36:44 -0500 [thread overview]
Message-ID: <1566146205-2428-1-git-send-email-wenwen@cs.uga.edu> (raw)
In sm_init_zone(), 'zone->lba_to_phys_table' is allocated through
kmalloc_array() and 'zone->free_sectors' is allocated in kfifo_alloc()
respectively. However, they are not deallocated in the following execution
if sm_read_sector() fails, leading to memory leaks. To fix this issue, free
them before returning -EIO.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
---
drivers/mtd/sm_ftl.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/sm_ftl.c b/drivers/mtd/sm_ftl.c
index dfc47a4..4744bf9 100644
--- a/drivers/mtd/sm_ftl.c
+++ b/drivers/mtd/sm_ftl.c
@@ -774,8 +774,11 @@ static int sm_init_zone(struct sm_ftl *ftl, int zone_num)
continue;
/* Read the oob of first sector */
- if (sm_read_sector(ftl, zone_num, block, 0, NULL, &oob))
+ if (sm_read_sector(ftl, zone_num, block, 0, NULL, &oob)) {
+ kfifo_free(&zone->free_sectors);
+ kfree(zone->lba_to_phys_table);
return -EIO;
+ }
/* Test to see if block is erased. It is enough to test
first sector, because erase happens in one shot */
--
2.7.4
reply other threads:[~2019-08-18 16:36 UTC|newest]
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