4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry V. Levin <ldv@xxxxxxxxxxxx> 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 <ldv@xxxxxxxxxxxx> Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/proc_namespace.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/proc_namespace.c +++ b/fs/proc_namespace.c @@ -197,6 +197,8 @@ 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 "); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html