CIFS: Fix memory leak in cifs_do_mount

and simplify error handling code.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 10 insertions, 9 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index d1ed7f9946d..1d2a93c60e7 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -556,9 +556,8 @@ cifs_do_mount(struct file_system_type *fs_type,
 
         sb = sget(fs_type, NULL, set_anon_super, NULL);
         if (IS_ERR(sb)) {
-                kfree(cifs_sb);
                 root = ERR_CAST(sb);
-                goto out;
+                goto out_cifs_sb;
         }
 
         /*
@@ -569,7 +568,7 @@ cifs_do_mount(struct file_system_type *fs_type,
         cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
         if (cifs_sb->mountdata == NULL) {
                 root = ERR_PTR(-ENOMEM);
-                goto err_out;
+                goto out_super;
         }
 
         sb->s_flags = flags;
@@ -581,21 +580,23 @@ cifs_do_mount(struct file_system_type *fs_type,
                              flags & MS_SILENT ? 1 : 0);
         if (rc) {
                 root = ERR_PTR(rc);
-                goto err_out;
+                goto out_super;
         }
 
         sb->s_flags |= MS_ACTIVE;
 
         root = dget(sb->s_root);
-out:
-        cifs_cleanup_volume_info(&volume_info);
-        return root;
+        goto out;
 
-err_out:
+out_super:
         kfree(cifs_sb->mountdata);
+        deactivate_locked_super(sb);
+
+out_cifs_sb:
         unload_nls(cifs_sb->local_nls);
         kfree(cifs_sb);
-        deactivate_locked_super(sb);
+
+out:
         cifs_cleanup_volume_info(&volume_info);
         return root;
 }