From: Jesper Juhl <jesper.juhl@gmail.com>
Date: Sat, 13 May 2006 23:42:25 +0000 (+0200)
Subject: mtd: fix memory leak in block2mtd_setup()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a6550e57f9d074511cf420bdb802ab5e56edc3bb;p=openwrt%2Fstaging%2Fblogic.git

mtd: fix memory leak in block2mtd_setup()

There's a mem leak in drivers/mtd/devices/block2mtd.c::block2mtd_setup()

We can leak 'name' allocated with kmalloc in 'parse_name' if leave via
the 'parse_err' macro since it contains a return but doesn't do any
freeing.

Spotted by coverity checker as bug 615.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
---

diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index f54e4bf9b968..45606921364b 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -429,7 +429,8 @@ static inline void kill_final_newline(char *str)
 
 static int block2mtd_setup(const char *val, struct kernel_param *kp)
 {
-	char buf[80+12], *str=buf; /* 80 for device, 12 for erase size */
+	char buf[80+12]; /* 80 for device, 12 for erase size */
+	char *str = buf;
 	char *token[2];
 	char *name;
 	size_t erase_size = PAGE_SIZE;
@@ -441,7 +442,7 @@ static int block2mtd_setup(const char *val, struct kernel_param *kp)
 	strcpy(str, val);
 	kill_final_newline(str);
 
-	for (i=0; i<2; i++)
+	for (i = 0; i < 2; i++)
 		token[i] = strsep(&str, ",");
 
 	if (str)
@@ -460,8 +461,10 @@ static int block2mtd_setup(const char *val, struct kernel_param *kp)
 
 	if (token[1]) {
 		ret = parse_num(&erase_size, token[1]);
-		if (ret)
+		if (ret) {
+			kfree(name);
 			parse_err("illegal erase size");
+		}
 	}
 
 	add_device(name, erase_size);