cifs: always zero out smb_vol before parsing options

Currently, the code relies on the callers to do that and they all do,
but this will ensure that it's always done.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 87fa16549f27..290c13442f75 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1122,6 +1122,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
         separator[1] = 0;
         delim = separator[0];
 
+        /* ensure we always start with zeroed-out smb_vol */
+        memset(vol, 0, sizeof(*vol));
+
         /*
          * does not have to be perfect mapping since field is
          * informational, only used for servers that do not support
@@ -3314,7 +3317,6 @@ expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
                         mdata = NULL;
                 } else {
                         cleanup_volume_info_contents(volume_info);
-                        memset(volume_info, '\0', sizeof(*volume_info));
                         rc = cifs_setup_volume_info(volume_info, mdata,
                                                         fake_devname);
                 }
@@ -3336,7 +3338,6 @@ cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
         if (cifs_parse_mount_options(mount_data, devname, volume_info))
                 return -EINVAL;
 
-
         if (volume_info->nullauth) {
                 cFYI(1, "Anonymous login");
                 kfree(volume_info->username);
@@ -3373,7 +3374,7 @@ cifs_get_volume_info(char *mount_data, const char *devname)
         int rc;
         struct smb_vol *volume_info;
 
-        volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
+        volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
         if (!volume_info)
                 return ERR_PTR(-ENOMEM);