cifs: fix memory leak when password is supplied multiple times

Unlikely but possible. When password is supplied multiple times, we have to free the previous allocation.

Signed-off-by Namjae Jeon <[email protected]>

Signed-off-by Ashish Sangwan <[email protected]>

---
 fs/cifs/connect.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

fs/cifs/connect.c +2 -1

index b4b6d10..91512fd 100644
@@ -1583,6 +1583,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
                         * Check if this is a case where the  password
                         * starts with a delimiter
                         */
+                       kfree(vol->password);
                        tmp_end = strchr(data, '=');
                        tmp_end++;
                        if (!(tmp_end < end && tmp_end[1] == delim)) {

@@ -1624,6 +1625,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
                                        options = end;
                        }
 
+                       kfree(vol->password);
                        /* Now build new password string */
                        temp_len = strlen(value);
                        vol->password = kzalloc(temp_len+1, GFP_KERNEL);
--

1.7.7