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>

1 files changed, 6 insertions, 3 deletions

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);