4.5-stable review patch. If anyone has any objections, please let me know.
------------------ From: Dmitry V. Levin <[email protected]> commit 5f8d498d4364f544fee17125787a47553db02afa upstream. Explicitly check show_devname method return code and bail out in case of an error. This fixes regression introduced by commit 9d4d65748a5c. Signed-off-by: Dmitry V. Levin <[email protected]> Signed-off-by: Al Viro <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/proc_namespace.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/proc_namespace.c +++ b/fs/proc_namespace.c @@ -199,6 +199,8 @@ static int show_vfsstat(struct seq_file 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 ");
