From 5f8d498d4364f544fee17125787a47553db02afa Mon Sep 17 00:00:00 2001
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Thu, 19 Mar 2015 11:10:54 +0000
Subject: [PATCH] vfs: show_vfsstat: do not ignore errors from show_devname
method
Explicitly check show_devname method return code and bail out in case
of an error. This fixes regression introduced by commit 9d4d65748a5c.
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/proc_namespace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 2256e7e23e678..3f1190d189915 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -199,6 +199,8 @@ static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt)
if (sb->s_op->show_devname) {
seq_puts(m, "device ");
err = sb->s_op->show_devname(m, mnt_path.dentry);
+ if (err)
+ goto out;
} else {
if (r->mnt_devname) {
seq_puts(m, "device ");
--
2.30.2