From: Andrei Vagin <avagin@openvz.org>
Date: Fri, 9 Jun 2017 00:32:29 +0000 (-0700)
Subject: fs: don't forget to put old mntns in mntns_install
X-Git-Tag: Ubuntu-5.0.0-8.9~4723^2
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=4068367c9ca7b515a209f9c0c8741309a1e90495;p=mirror_ubuntu-disco-kernel.git

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 8bd3e4d448b9..5a4438445bf7 100644
--- 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);