fs: don't forget to put old mntns in mntns_install

Fixes: 4f757f3cbf54 ("make sure that mntns_install() doesn't end up with referral for root")
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namespace.c b/fs/namespace.c
index 8bd3e4d448b9f07a8aa148c8d08c092f45471a7c..5a4438445bf788e65ade26b741911861d7ea2084 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -3488,6 +3488,8 @@ static int mntns_install(struct nsproxy *nsproxy, struct ns_common *ns)
                return err;
        }
 
+       put_mnt_ns(old_mnt_ns);
+
        /* Update the pwd and root */
        set_fs_pwd(fs, &root);
        set_fs_root(fs, &root);