From 147aedbb01ebaed587181b2bb769307df104ee82 Mon Sep 17 00:00:00 2001
From: Wengang Wang <wen.gang.wang@oracle.com>
Date: Tue, 19 Nov 2024 09:45:00 -0800
Subject: [PATCH] ocfs2: update seq_file index in ocfs2_dlm_seq_next

commit 914eec5e980171bc128e7e24f7a22aa1d803570e upstream.

The following INFO level message was seen:

seq_file: buggy .next function ocfs2_dlm_seq_next [ocfs2] did not
update position index

Fix:
Update *pos (so m->index) to make seq_read_iter happy though the index its
self makes no sense to ocfs2_dlm_seq_next.

Link: https://lkml.kernel.org/r/20241119174500.9198-1-wen.gang.wang@oracle.com
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/ocfs2/dlmglue.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 42465693d..345dbe901 100755
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3101,6 +3101,7 @@ static void *ocfs2_dlm_seq_next(struct seq_file *m, void *v, loff_t *pos)
 	struct ocfs2_lock_res *iter = v;
 	struct ocfs2_lock_res *dummy = &priv->p_iter_res;
 
+	(*pos)++;
 	spin_lock(&ocfs2_dlm_tracking_lock);
 	iter = ocfs2_dlm_next_res(iter, priv);
 	list_del_init(&dummy->l_debug_list);