ocfs2: use regular seq_show_option for osb_cluster_stack

While cleaning up seq_show_option_n()'s use of strncpy, it was noticed
that the osb_cluster_stack member is always NUL-terminated, so there is no
need to use the special seq_show_option_n() routine.  Replace it with the
standard seq_show_option() routine.

Link: https://lkml.kernel.org/r/20230726215919.never.127-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 988d1c0..6b90642 100644 (file)
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1517,8 +1517,7 @@ static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
                seq_printf(s, ",localflocks,");
 
        if (osb->osb_cluster_stack[0])
-               seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
-                                 OCFS2_STACK_LABEL_LEN);
+               seq_show_option(s, "cluster_stack", osb->osb_cluster_stack);
        if (opts & OCFS2_MOUNT_USRQUOTA)
                seq_printf(s, ",usrquota");
        if (opts & OCFS2_MOUNT_GRPQUOTA)