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>

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index d1ed7f9..1d2a93c 100644 (file)
--- 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;
 }