From 6fa2bb0d06ca8636ef687e2eaeeb0c5fd2d3aee8 Mon Sep 17 00:00:00 2001
From: Vasily Averin <vvs@virtuozzo.com>
Date: Fri, 24 Jan 2020 09:10:47 +0300
Subject: [PATCH] help_next should increase position index

[ Upstream commit 9f198a2ac543eaaf47be275531ad5cbd50db3edf ]

if seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output.

https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/orangefs/orangefs-debugfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/orangefs/orangefs-debugfs.c b/fs/orangefs/orangefs-debugfs.c
index 25543a966c48..29eaa4544372 100644
--- a/fs/orangefs/orangefs-debugfs.c
+++ b/fs/orangefs/orangefs-debugfs.c
@@ -273,6 +273,7 @@ static void *help_start(struct seq_file *m, loff_t *pos)
 
 static void *help_next(struct seq_file *m, void *v, loff_t *pos)
 {
+	(*pos)++;
 	gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_next: start\n");
 
 	return NULL;